Lighting device for cosmetic applications and use of the lighting device for cosmetic applications

Abstract

A lighting device for hair comprises a support device (110) defining an interior space (111) with an outer contour (112), wherein the interior space (111) of the support device (110) is dimensioned such that the support device (110) is suitable for at least partially surrounding a human head at a distance therefrom. A plurality of light sources (310, 320, 330) are distributed on the support device (110, 350), wherein each light source (310, 320, 330) is configured to emit a light cone (312, 322, 332) directed toward the interior space (111).

Description

2025-INV-0047 -1 - Lighting device for cosmetic applications and use of the lighting device for cosmetic applications

[0001] The invention relates to a lighting device for head hair and scalp, in particular a lighting device to assist photoinduced bleaching of hair for cosmetic and hair care applications. The invention also relates to the use of a lighting device for the optical excitation of a photosensitizer contained in a bleaching agent. The lighting device is particularly suitable for use in beauty salons and hair salons. BACKGROUND

[0002] Hair bleaching is a widely used procedure in hair cosmetics. An oxidizing agent is applied to the hair for a period of time sufficient to achieve the desired degree of bleaching. Typically, a hydrogen peroxide solution with a concentration of 1 to 12% by weight is used as the oxidizing agent. The hydrogen peroxide solution is applied to the hair under alkaline conditions and bleaches the hair by oxidizing melamine, the pigment that gives hair its color.

[0003] To enhance the bleaching effect, a persulfate-based formulation, also known as a "booster," can be added to the hydrogen peroxide solution. Suitable persulfates include sodium, potassium, or ammonium persulfate salts in powder form, which are mixed into the hydrogen peroxide solution before application. The mixed product is then applied to the hair and left on for a specific time to achieve the desired level of lightening.

[0004] It is known to enhance the chemical bleaching effect based on hydrogen peroxide solution and persulfates by a physical component. For example, EP 3 137 171 B1 discloses a method for bleaching hair, comprising (i) a step of applying a composition containing one or more chemical oxidizing agents, and (ii) a step of irradiating the hair with UV-VIS radiation after application of the composition.

[0005] The bleaching of hair under the influence of light is also described in WO 2021 / 185911 A1, WO 2021 / 185920 A1, and US 2021 / 0030643 A 1, whereby the required irradiance is high and therefore undesirable damage can occur. 2025-INV-0047 -2-

[0006] Furthermore, the use of light for medical purposes is known, for example from US 6,663,659 B2 and EP 3 328492 B1. For instance, US 7,722,656 B1 describes a device for stimulating hair growth using light sources in the infrared range (2500 nm to 10000 nm). The use of light as a heat source in cosmetic treatments is described in DE 42 35436 B2.

[0007] US 10,994,156 B2 describes a method for dyeing hair using a polymer-based dye that is activated by UV radiation. This may involve a device, such as a cap, which incorporates appropriate light sources.

[0008] US patent 8,387,271 B2 discloses a hairdryer which, in addition to the actual hair blower, has LEDs that emit light in the near-infrared range.

[0009] From US patent 4,352,248, a vaporizer for hair treatments is known in which a mist is generated by means of an ultrasonic atomizer, which is heated by means of a heater to generate steam, before the heated steam is supplied to an interior hood for the treatment of head hair.

[0010] With existing devices, in addition to the desired bleaching effect from irradiation, the required light intensity can also damage the scalp and hair. Furthermore, the bleaching effect is uneven because not all sections of the hair are illuminated uniformly. Therefore, improvements are needed. SOLUTION

[0011] According to one embodiment described herein, a lighting device for hair, for example head hair, is provided. The lighting device comprises a support structure that defines an interior space with an outer contour, the interior space of the support structure being dimensioned such that the support structure is suitable for at least partially surrounding a human head at a distance. A plurality of light sources emitting radiation in the range of 230 nm to 1000 nm, in particular from 380 nm to 1000 nm, in particular from 380 nm to 900 nm, in particular from 380 nm to 800 nm, in particular from 380 nm to 450 nm, in particular from 390 nm to 430 nm, and in particular from 400 nm to 420 nm, are arranged distributed on the support structure, each light source being configured to emit a cone of light directed towards the interior space. The lighting device further comprises a control device for controlling the light sources.The light sources are like this. 2025-INV-0047 -3- arranged and controllable by the control device such that light cones of adjacent light sources partially overlap in a virtual area spaced from the outer contour and have an average irradiance of 5 to 70 mW / cm² 2 , especially 10 to 50 mW / cm² 2 and in particular 25 to 40 mW / cm² 2 in the virtual area, wherein the virtual area extends from the outer contour at a distance of 1 to 70 cm, in particular 1 to 50 cm, in particular 3 to 50 cm, and in particular 5 to 25 cm, and the virtual area is intended to represent the contour of a human head with hair. The distance of the virtual area from the outer contour is also referred to as distance D.

[0012] The hair illuminator is particularly suitable and adapted to support photoinduced chemical bleaching of hair for hair cosmetic applications, wherein the radiation emitted by the light sources excites a photosensitizer, which, through this excitation, is enabled to generate singlet oxygen. The radiation emitted by the illuminator excites the photosensitizer as a chemical component to generate singlet oxygen as a bleaching agent. The radiant power of the radiation emitted by the light sources can be adjusted accordingly for this excitation.In particular, the radiation output, and especially the irradiance acting on the head, can be reduced compared to previously known methods where the radiation directly leads to bleaching, since bleaching does not occur directly through the action of the radiation on the hair but indirectly via the radiation-induced excitation of the photosensitizer. This reduces damage to the hair and scalp. Furthermore, the reduced irradiance improves comfort for both the client and the stylist.

[0013] The applications, procedures and uses described here are cosmetic applications and uses, not therapeutic applications, procedures or uses.

[0014] The radiation emitted by the light sources of the illumination device, in particular the wavelength range and the applied irradiance, is adapted to the photosensitizer for the generation of singlet oxygen. Unlike ordinary triplet oxygen (a diradical), singlet oxygen is an excited form of oxygen that possesses a double bond and behaves like an electron-deficient olefin. Particularly when using phenalenones as photosensitizers, it is possible to expose the hair to generate singlet oxygen at a relatively low irradiance by illuminating it in the range of 390 nm to 430 nm, and especially in the range of 400 nm to 420 nm. This irradiance is significantly lower than that typically required for photo-assisted radical imaging, as described, for example, in US 2021 / 0030643 A1. 2025-INV-0047 -4-

[0015] According to one embodiment, which can be combined with all embodiments described here, the arrangement of the light sources, in particular the lateral distance between the light sources, is selected and the control device can be controlled in such a way that the average irradiance is between 5 and 70 mW / cm². 2 at a distance of 1 to 70 cm, in particular 1 to 50 cm, in particular 5 to 50 cm, and in particular 5 to 25 cm. The radiation of the light sources can be in the range of 390 nm to 430 nm, and in particular from 400 nm to 420 nm.

[0016] According to one embodiment, which can be combined with all the embodiments described here, the arrangement of the light sources, in particular the lateral distance between the light sources, is selected and the control device can be controlled in such a way that the average irradiance is between 10 and 50 mW / cm². 2at a distance of 1 to 50 cm, in particular 3 to 50 cm or in particular 5 to 50 cm, in particular 3 to 25 cm, for example 3 to 15 cm, and in particular from 5 to 25 cm. For example, the average irradiance of 10 to 50 mW / cm² can be achieved. 2 This can be achieved at a distance of 3 to 50 cm, in particular 3 to 25 cm, for example 3 to 15 cm. The radiation from the light sources can be in the range of 390 nm to 430 nm, and in particular from 400 nm to 420 nm.

[0017] According to one embodiment, which can be combined with all embodiments described here, the arrangement of the light sources, in particular the lateral distance between the light sources, is selected and the control device can be controlled in such a way that the average irradiance is between 25 and 45 mW / cm². 2at a distance of 1 to 50 cm, in particular 3 to 50 cm or in particular 5 to 50 cm, in particular 3 to 25 cm, for example 3 to 15 cm, and in particular from 5 to 25 cm. For example, the average irradiance of 25 to 45 mW / cm² can be achieved. 2 This can be achieved at a distance of 3 to 50 cm, in particular 3 to 25 cm, for example 3 to 15 cm. The radiation from the light sources can be in the range of 390 nm to 430 nm, and in particular from 400 nm to 420 nm.

[0018] According to one embodiment, which can be combined with all embodiments described here, the arrangement of the light sources, in particular the lateral distance between the light sources, is selected and the control device can be controlled in such a way that the average irradiance is between 25 and 45 mW / cm². 2at a distance of 5 to 20 cm, and especially from 5 to 15 cm. For example, the average irradiance can be 30 to 40 mW / cm². 2 This can be achieved at a distance of 5 to 20 cm. The radiation from the light sources can be in the range of 390 nm to 430 nm, and especially from 400 nm to 420 nm. 2025-INV-0047 -5-

[0019] The support device can be designed, in particular, to surround the human head on two sides, for example, on the left and right sides relative to the human head. The support device can also be designed, in particular, to surround the human head on three sides, for example, on the left and right sides and the top side, i.e., above the head. The interior space is sufficiently large to accommodate a human head with hair. The outer contour of the interior space and the virtual surface representing a human head with hair are therefore spaced apart from each other.

[0020] The light sources emit radiation in the range of > 230 nm to < 1000 nm, preferably in the range of > 380 nm to < 1000 nm. In particular, a range of > 380 nm to < 800 nm is suitable, for example, > 380 nm to < 780 nm. Furthermore, suitable ranges are those of > 380 nm to < 490 nm, especially in the range of > 390 nm to < 430 nm, and particularly in the range of > 400 nm to < 420 nm. For many applications, a range of > 380 nm to < 800 nm has proven suitable.

[0021] According to an embodiment described herein, an illumination device is used for the optical excitation of a photosensitizer contained in a bleaching agent to stimulate it to form singlet oxygen, wherein the bleaching agent comprises: (A) at least one first photosensitizer capable of generating singlet oxygen upon light excitation, (B) at least one persulfate salt, (C) at least one alkalizing agent, and (E) at least one hydrogen peroxide source.

[0022] Further embodiments, modifications, uses and advantages will become apparent to the person skilled in the art from the following detailed description. FIGURES

[0023] The accompanying drawings illustrate embodiments and, together with the description, serve to explain the principles of the solution described herein, without the embodiments being intended to restrict the scope of protection defined by the claims. The elements of the drawings are relative to each other and not necessarily to scale. Figure 1 shows a side view of a lighting device according to one embodiment. Figure 2 shows a top view of the lighting device from Figure 1. 2025-INV-0047 -6- Figure 3 shows a lighting device to illustrate the arrangement of the light sources. Figure 4 shows a lighting device to illustrate the superposition of light cones from adjacent light sources. Figure 5 shows a schematic view of an arrangement for evaluating the distribution of irradiance. Figures 6A to 6F show the distribution of irradiance in the virtual area as a function of the distance D between the light sources and the virtual area for the arrangement shown in Figure 5. Figure 7 shows another schematic view of an arrangement for evaluating the distribution of irradiance. Figures 8A and 8B show the distribution of irradiance in the virtual area as a function of the distance D between the light sources and the virtual area for the arrangement shown in Figure 7. Figure 9 shows the mean irradiance as a function of distance D for the arrangement shown in Figure 7. Figures 10A to 10C show another lighting device according to one embodiment. Figures 11A to 11G show another lighting device according to one embodiment. Figures 12A to 12F show another lighting device according to one embodiment. Figures 13A and 13B show a modification of the lighting device of Figures 12A to 12F. 2025-INV-0047 -7- Figure 14 shows a further modification of the lighting device of Figures 12A to 12F. Figure 15 shows an overview of the control of the lighting device according to one embodiment. Figures 16A to 16C show a further modification of the lighting device of Figures 12A to 12F. Figures 17A to 17C show a further modification of the lighting device of Figures 12A to 12F. Figure 18 shows an internal coating or lining of the interior of a lighting device. DETAILED DESCRIPTION

[0024] With reference to Figures 1 and 2, a lighting device 100 for head hair comprises a support device 110 with a plurality of light sources and a control device for controlling the light sources. The support device 110 defines an interior space 111 with a virtual outer contour 112, which delimits the interior space 111.

[0025] According to one embodiment, which can be combined with all embodiments described here, the support device 110 has at least two adjustable wing elements 113a, 113b, which are located on opposite sides of the head when the lighting device 100 is used as intended, and at least one head element 114a, 114b, which is located above or behind the head when the lighting device 100 is used as intended, wherein a plurality of light sources are arranged distributed on each wing element 113a, 113b and on the head element 114a, 114b.

[0026] The support device 110 can be constructed in one piece or in multiple parts. The embodiment of a lighting device 100 shown in Figure 1 depicts a multi-part support device 110 with two lateral wing elements 113a, 113b and two centrally arranged head elements 114a and 114b. The wing elements 113a, 113b and the head elements 114a and 114b, which together are also simply referred to as elements, are individually attached to a curved support 117 of the support device 110, which 2025-INV-0047 -8- is supported by a stand 115. Individual or all elements 113a, 113b, 114a and 114b can be movably attached to the support 117 in order to change the positions of the elements 113a, 113b, 114a and 114b relative to the support 117 or relative to the support device 110.

[0027] The inner surfaces of elements 113a, 113b, 114a, and 114b, specifically the light-emitting surfaces of the individual light sources, define the virtual outer contour 112 of the interior space 111. As shown in Figure 1, the interior space 111 is sufficiently large so that elements 113a, 113b, 114a, and 114b surround a human head with sufficient clearance. The wing elements 113a and 113b are attached to the support 117, for example, via a pivot joint 116. The pivot joint 116 allows, for example, lateral pivoting to vary the distance between the wing elements 113a and 113b (see Figure 2) and to adjust the height of the wing elements 113a. If the lighting device 100 has several spaced-apart elements 113a, 113b, 114a and 114b, the virtual outer contour 112 continues conceptually between the individual elements 113a, 113b, 114a and 114b.This is indicated in Figures 1 and 2 by the dashed line 112. The virtual outer contour 112 can thus be understood as a (curved) surface that connects the light-emitting surfaces of the individual light sources.

[0028] The rotary joint 116 can allow free rotation. Alternatively, it is possible for the rotary joint 116 to have a detent setting with predefined detents. It is also possible to switch between free rotation and rotation with predefined detents. The rotary joint 116 can, for example, allow pivoting in the lateral direction, in the vertical direction, and rotation along an axis extending longitudinally from the respective element 113a, 113b, 114a, and 114b.

[0029] The head elements 114a, 114b can also be attached to the support 117 via a swivel joint. Alternatively, the head elements 114a, 114b can be rigidly attached to the support 117. The support 117, connected to the stand 115, can have a height adjustment mechanism to change the overall height of the support device 110 and adapt it to the height of, for example, a seated person. Alternatively, the stand 115 can include a height adjustment mechanism, or, as indicated in Figure 1, the support 117 and the stand 115 together can form a height adjustment mechanism. The height adjustability of the support device 110 simultaneously changes the vertical position of all elements 113a, 113b, 114a, and 114b. In addition, the wing elements 113a, 113b, for example, can be adjusted in height by pivoting them vertically.The wing elements 113a, 113b can therefore be pivoted in both lateral and vertical directions, for example. 2025-INV-0047 -9-

[0030] Each of the elements 113a, 113b, 114a, and 114b can each have a plurality of light sources arranged on the respective surface of the elements 113a, 113b, 114a, and 114b facing the interior 111. The light sources of each of the elements 113a, 113b, 114a, and 114b are spaced apart from one another and radiate towards the interior 111. The radiation pattern of each light source can be described as a light cone, although this is not to be interpreted restrictively.

[0031] By changing the position of elements 113a, 113b, 114a, and 114b, the size of the interior space 111, and thus the virtual outer contour 112, can be adjusted. The support device 110, with the arrangement of elements 113a, 113b, 114a, and 114b, is dimensioned such that it is suitable for surrounding a human head at a distance. In particular, elements 113a, 113b, 114a, and 114b are spaced apart from a head located in the interior space 111.

[0032] The light sources are arranged and controllable by the control device in such a way that the light cones of adjacent light sources partially overlap in a virtual area spaced from the outer contour 112 and have an average irradiance (illuminance) of 5 to 70 mW / cm². 2 , especially 10 to 50 mW / cm² 2 and in particular 25 to 40 mW / cm² 2in the virtual area. The virtual area represents the contour of a human head, as can be seen, for example, in Figure 1. The position of the elements 113a, 113b, 114a and 114b can be adjusted, in particular, such that the virtual area has an average distance of 1 to 50 cm, in particular 5 to 50 cm, in particular 5 to 25 cm, for example 5 to 15 cm, from the outer contour 112.

[0033] The outer shape of an adult's head can be considered the virtual surface. This outer shape can be understood as the enveloping surface that covers the head and hair. A medium-sized head can be assumed. Medium-sized heads are familiar from the clothing industry and are described, for example, by head circumference. A head circumference of 57 to 58 cm can be considered a medium size. To this circumference, the circumference resulting from the hair is then added. This calculation assumes wet hair, possibly folded or placed on foil, as long hair is often folded during bleaching. The enveloping surface is therefore larger than that of a head without hair. A professional working in this field can easily determine, perhaps by consulting stylists, the average size of the enveloping surface and thus the average "volume" of the head.This average size, which defines the virtual area, is taken as the starting point for dimensioning the interior space 111, in particular as the starting point for the spacing of elements 113a, 113b, 114a and 114b from the virtual area. Elements 113a, 113b, 114a and 114b are then positioned such that... 2025-INV-0047 -10- The light cones of adjacent light sources overlap to such an extent that a largely uniform irradiance results in the virtual area, and the irradiance lies within the desired range. It is assumed that the head is located centrally in the interior space 111; that is, with reference to the embodiment shown in Figures 1 and 2, the head is positioned centrally between the wing elements 113a, 113b and is approximately the same distance from the head elements 114a, 114b as it is from the wing elements 113a, 113b. The basic idea is that the irradiance acting on the surface of the head, which is represented by the virtual area, is largely uniform.

[0034] The distance of the outer contour set by the selected position of elements 113a, 113b, 114a and 114b from the virtual surface is chosen in particular so that a person does not feel confined and can still move their head freely.

[0035] The virtual surface is curved according to the shape of the head. The arrangement of elements 113a, 113b, 114a, and 114b should follow the shape of the head. If separate and spaced elements 113a, 113b, 114a, and 114b are used, it is possible that the virtual surface (head shape) will not be uniformly illuminated. However, at least some areas of the virtual surface (head shape) will be illuminated largely evenly. By adjusting elements 113a, 113b, 114a, and 114b, overall uniform illumination can be achieved.

[0036] According to one embodiment, which can be combined with all embodiments described herein, the position of the wing elements 113a, 113b and / or the head element(s) 114a, 114b is adjustable in detents. Optionally, when moving the elements 113a, 113b, 114a and 114b into one of the detents, the intensity of the individual LEDs or all LEDs of the respective element 113a, 113b, 114a and 114b can be adjusted simultaneously, depending on the detent. Each detent can correspond to a predefined distance of the respective element 113a, 113b, 114a and 114b from the virtual surface (head). To facilitate operation, a desired irradiance can be specified and the current supply to the LEDs can be adjusted by the control device depending on the detent levels, so that the desired irradiance is achieved regardless of the selected detent level (position of the respective element 113a, 113b, 114a and 114b).For this purpose, the control device of all elements, or the control device of the respective element 113a, 113b, 114a and 114b, can be configured to query or record the current detent position of the element(s) 113a, 113b, 114a and 114b. For this purpose, measuring transmitters, for example incremental encoders or absolute encoders, can be provided, which assign an output value to each detent position that can be queried or recorded by the control device. 2025-1 NV-0047 -11-

[0037] The overlap of the light cones from adjacent light sources can be selected such that the irradiance in the virtual area fluctuates by only 1 to 30% around a mean value. A suitable range is 10 to 50 mW / cm² for the mean irradiance. 2 and in particular 25 to 40 mW / cm² 2 , for example 25 to 35 mW / cm² 2 or 30 to 35 mW / cm² 2 or 30 to 40 mW / cm²2The irradiance lies within the virtual area. Those skilled in the art are familiar with methods for determining the average irradiance, for example, by taking measurements at various points within the virtual area. The lateral distance between adjacent light sources can be chosen depending on the maximum radiant intensity of the light sources. A typical minimum lateral distance might be 5 cm, for example, if each light source has a collimator (lens device) for focusing or spreading the emitted light. Collimators (lens devices) can be used, for example, to spread the radiation emitted by the light sources, thus allowing for a greater lateral distance between the light sources compared to light sources without collimators. This ensures uniform irradiance even at a greater lateral distance. Without collimators (lens devices), the minimum lateral distance might be approximately 3 cm.The maximum lateral distance between adjacent light sources is not greater than 10 cm, in particular, to ensure uniform illumination. The values ​​mentioned above refer to light sources attached to elements 113a, 113b, 114a, and 114b.

[0038] The light sources emit particularly in a range of 380 nm to 800 nm and are oriented such that they each emit a cone of light directed towards the interior. Narrowband light sources are suitable, especially LEDs, including both conventional LEDs (inorganic semiconductors) and OLEDs (organic semiconductors). The light sources emit with a bandwidth of no more than ±35 nm, in particular no more than ±25 nm, for example no more than ±15 nm, and in particular no more than ±10 nm around their nominal emission wavelength. When an emission wavelength is mentioned, the nominal emission wavelength, i.e., the one with the highest intensity, is meant. In the following, the term LEDs will be used for simplicity, but this is not the only term.According to one embodiment, LEDs with a spectral intensity distribution are used in particular, where the area of ​​highest intensity, i.e. the intensity range above 75% of the maximum intensity, has a spectral width of ± 25 nm.

[0039] Within the scope of this disclosure, the terms “electromagnetic radiation”, “radiation” and “light” are used synonymously and refer to the specified wavelength ranges. 2025-INV-0047 -12-

[0040] Those skilled in the art know that the terms irradiance and illuminance physically describe the same thing: the power emitted per unit area (luminous flux). In radiology, the term irradiance is more commonly used, while in photometry, illuminance is preferred, as the radiant power is weighted according to the luminous efficacy curve of the human eye. To adjust the power emitted at the site of action, i.e., the hair, for photoinduced chemical bleaching, it is possible to vary the radiant power of individual LEDs, change the number or spatial density of the LEDs, or adjust the distance between the LEDs and the virtual surface. Since the lighting device is used for the light-induced excitation of the photosensitizer, irradiance is the relevant term here.

[0041] If the spatial distribution of the LEDs is determined by their arrangement on the support device 110, the irradiance can be adjusted by modifying the radiant power via the control device 130 and / or the distance of the LEDs from the virtual surface. Furthermore, individual LEDs can be switched off to vary the spatial density of the active LEDs. The LEDs can be controlled all together, in groups, or individually. For example, LEDs located at the edge of the respective elements 113a, 113b, 114a, and 114b can be controlled separately from LEDs located further away from the edge to compensate for edge effects of the irradiation by the respective element 113a, 113b, 114a, and 114b. It is also possible to adjust the density of the spatial arrangement of the LEDs to reduce edge effects.

[0042] The groups can be accessed independently of each other in terms of location and / or time.

[0043] According to one embodiment, which can be combined with all embodiments described here, the LEDs are controlled in groups by the control device 130. The control device 130 is not shown in Figures 1 and 2. The control device 130 can be provided as a separate unit, but it can also be implemented by several control devices, one for each element 113a, 113b, 114a, and 114b. In the latter case, the respective control device can, for example, be integrated into the respective element 113a, 113b, 114a, and 114b, thus enabling individual control of each element 113a, 113b, 114a, and 114b.

[0044] According to one embodiment, which can be combined with all embodiments described here, the LEDs (light sources) comprise first light sources with a first emission wavelength and second light sources with a second emission wavelength different from the first emission wavelength. For simplicity, the first 2025-INV-0047 -13- Light sources are referred to as first LEDs and second light sources as second LEDs, without being limited to this.

[0045] For example, the first emission wavelength can be in the range of 380 nm to 450 nm, particularly in the range of 400 nm to 420 nm. If all LEDs have the same emission wavelength, then these ranges are suitable for all LEDs. The first LEDs, or, in the case of the same emission wavelength, all LEDs, emit in a wavelength range suitable for exciting a photosensitizer. A preferred emission wavelength for exciting the photosensitizer is 405 nm. If the UV component is too high due to the emission bandwidth of the LEDs (or the first LEDs), LEDs with an emission wavelength of 415 nm can also be used.

[0046] According to one embodiment, which can be combined with all other embodiments described herein, the lighting device is used for bleaching hair, wherein a bleaching agent is applied to the hair. The bleaching agent comprises (A) at least a first photosensitizer capable of generating singlet oxygen upon light excitation, (B) at least one persulfate salt, (C) at least one alkalizing agent, and (E) at least one hydrogen peroxide source.

[0047] In the context of this disclosure, the term “photosensitizer” describes a compound that absorbs electromagnetic radiation, preferably visible light, UV light and / or infrared light, and generates singlet oxygen. According to one embodiment, which can be combined with all other embodiments described herein, the photosensitizer comprises at least one phenalenone.

[0048] According to one embodiment, which can be combined with all other embodiments described herein, the bleaching agent comprises at least a second photosensitizer capable of generating singlet oxygen upon light excitation.

[0049] Phenalenones are known to generate singlet oxygen, see e.g. J. Photochem. Photobiol. A: Chem, 79 (1994) 11-17 and New J. Chem., 1999, 23, 85-93.

[0050] In one embodiment, the phenalenones are unsubstituted phenalenone or unsubstituted phenalenones that are substituted, preferably at position 2 of the phenalenone ring, with at least one organic component that is combined with at least one 2025-1 NV-0047 -14- is substituted with a positively charged nitrogen atom and / or at least one neutral, protonable nitrogen atom and at least one negatively charged functional group.

[0051] According to one embodiment, which can be combined with all other embodiments described herein, the first photosensitizer is selected from the group consisting of phenalenones, turmeric, flavins, riboflavins, phenoxazines, phenothiazines, phthalocyanines, naphthalocyanines, xanthenes, chlorophyll A, chlorophyll B, porphyrins, coumarins, pyrenes, perylene, acridine orange, and tetrapyrroles. In addition to the first photosensitizer, the bleaching agent may also contain a second photosensitizer selected from the group consisting of turmeric, flavins, riboflavins, phenoxazines, phenothiazines, phthalocyanines, naphthalocyanines, xanthenes, chlorophyll A, chlorophyll B, porphyrins, coumarins, pyrenes, perylene, acridine orange, and tetrapyrroles. In particular, different first and second photosensitizers are used. For example, the first photosensitizer can be a phenalenone and the second photosensitizer can be selected from the group mentioned above.

[0052] Phenalenones are known to generate singlet oxygen, as described, for example, in J. Photochem. Photobiol. A: Chem, 79 (1994) 11-17 and New J. Chem., 1999, 23, 85-93.

[0053] In one embodiment, suitable flavins are disclosed in EP 2 723 342 A1, EP 2 723 743 A1, EP 2 723 742 A1 and US 2019 / 0111168 A1.

[0054] In one embodiment, suitable curcumins are disclosed in US 2019 / 0111168 A1. Suitable curcumin derivatives and their preparation are also described in CA 2 888 140 A1, and suitable curcumin-3,5-dione derivatives and their preparation are similarly described in EP 2 698 368 A1.

[0055] In one embodiment, the phenoxazine is preferably Nile blue.

[0056] In one embodiment, the phenothiazines are preferably selected from the group consisting of methylene blue, toluidine blue, 1,9-dimethylmethylene blue and methylene green.

[0057] In one embodiment, the phthalocyanines are preferably selected from the group consisting of zinc phthalocyanine, aluminum phthalocyanine, zinc phthalocyanine tetrasulfonate and tetrakis(p-trimethylammonium)phthalocyanine zinc chloride.

[0058] In one embodiment, the xanthenes are preferably selected from the group consisting of pyronin G, eosin B, eosin Y and rose bengal. 2025-INV-0047 -15-

[0059] In one embodiment, the porphyrins are preferably selected from the group consisting of 5,10,15,20-tetrakis(1-methyl-4-pyridinio)porphyrin-tetra(p-toluenesulfonate) and tetrakis(p-trimethylammoniumphenyl)porphyrin chloride.

[0060] In one embodiment, the tetrapyrroles are preferably selected from the group consisting of chlorin, chlorin e6 and bacteriochlorin.

[0061] In one embodiment, the at least one phenalenone (A) preferably generates singlet oxygen when exposed to electromagnetic radiation with a wavelength in the range of > 230 nm to < 1000 nm, particularly in the range of > 380 nm to < 1000 nm, particularly in the range of > 380 nm to < 780 nm, particularly in the range of > 380 nm to < 490 nm, particularly in the range of > 390 nm to < 430 nm, and particularly in the range of > 400 nm to < 420 nm. The most suitable wavelength for the photosensitizer to generate singlet oxygen is selected based on the specific chemical nature of the photosensitizer.

[0062] In one embodiment, the at least one phenalenone (A) is preferably dissolved in at least one polar solvent before being mixed with the other components of the bleaching agent.

[0063] The bleaching agent contains a persulfate salt (B). In one embodiment, the at least one persulfate salt (B) is selected from the group consisting of alkaline earth metal persulfate salts, alkali metal persulfate salts, and ammonium persulfate salts, which exhibit oxidizing activity, i.e., generate active oxygen, when combined with an aqueous composition comprising hydrogen peroxide. Examples of alkali metal persulfate salts are lithium persulfate, sodium persulfate, potassium persulfate, and cesium persulfate. Examples of alkaline earth metal salts are magnesium persulfate and calcium persulfate. In another embodiment, the at least one persulfate salt (B) is preferably selected from the group consisting of ammonium persulfate, sodium persulfate, and potassium persulfate. The persulfate salts are generally in particulate form and have an average particle size in the range of > 0.1 pm to < 200 pm.

[0064] In a preferred embodiment, the at least one alkalizing agent (C) is selected from the group consisting of ammonia, alkanolamines, and inorganic alkalizing agents. In a preferred embodiment, the alkanolamines are selected from primary amines having a C2-C6 alkyl base bearing at least one hydroxyl group. Preferred alkanolamines are selected from the group consisting of monoethanolamine, 3-aminopropan-1-ol, 2-amino-1-propanol, 4-aminobutan-1-ol, 5-aminopentan-1-ol, 1-aminopropan-2-ol, 1-aminobutan-2-ol, 1-aminopentan-2-ol, 1- 2025-INV-0047 -16- aminopentan-3-ol, 1-aminopentan-4-ol, 3-amino-2-methylpropan-1-ol, 1-amino-2-methylpropan-2-ol, 3-aminopropan-1,2-diol and 2-amino-2-methylpropan-1,3-diol.

[0065] In one embodiment, the bleaching agent preferably comprises at least one additive (D) selected from the group consisting of sources of carbonate ions or hydrogen carbonate ions or carbamates, aluminosilicates, surfactants, chelating agents, thickeners, fillers, amino acids, hydrolyzed proteins, fatty substances, saturated acyclic terpenes with 10 to 40 carbon atoms, C3-C20 monocarboxylic acids and C3-C10 di- or tricarboxylic acids.

[0066] Further preferred photosensitizers, persulfates and alkalizing agents, as well as preferred combinations, concentrations and other components are contained in WO 2024 / 246147 A 1 (with priority of EP application 23 177 117.1 of the applicant dated 02.06.2023), the full disclosure of which is hereby incorporated.

[0067] As demonstrated in the examples of WO 2024 / 246147 A1, a photosensitizer enables improved bleaching without causing additional damage to the hair. Specifically, the examples in WO 2024 / 246147 A1 showed that using a photosensitizer in a bleaching agent allows for stronger bleaching without causing additional damage. The bleaching strength was determined photometrically (expressed as AL in the examples of WO 2024 / 246147), and the hair damage was determined by Fourier-transform infrared spectroscopy (FTIR spectroscopy) and expressed as AFTIR. It is therefore also possible to bleach hair more gently while achieving the same bleaching strength.

[0068] The results of WO 2024 / 246147 also show that no additional hair damage was observed after irradiation with an irradiance in the preferred range. The experiments in WO 2024 / 246147 were conducted with a light source emitting at 415 nm and an irradiance of 35 mW / cm². 2 carried out.

[0069] As explained above, the LEDs, or the first LEDs, serve to excite the photosensitizer. However, irradiation by the first LEDs does not lead to physical bleaching of the hair through direct action of the radiation emitted by the first LEDs. This is where the present approach, in which the radiation excites the first and / or second photosensitizer, differs from previously known irradiation devices in which the incident radiation directly leads to bleaching. For example, in the aforementioned EP 3 137 171 B1, in Example 1 ("Example 1 - bleaching", paragraphs

[0134] until

[0136] ) explains that the hair is exposed to an irradiance of 751 mW / cm² 2 was irradiated for 15 min at 365 nm. In the further examples of EP 3 137 171 B1, an irradiance between 400 and 2025-INV-0047 -17- 1200 mW / cm 2worked (see example, table in paragraph)

[0176] Such high levels of radiation lead to physical bleaching with corresponding damage to the hair.

[0070] In contrast, the lighting device described here only uses an irradiance of 5 to 70 mW / cm². 2 , especially 10 to 50 mW / cm² 2 and especially 25-40 mW / cm² 2 This method is designed so that only the photosensitizer is stimulated; physical bleaching of the hair is not intended. When using the lighting device described here, bleaching occurs chemically. The exposure serves only to stimulate the photosensitizer. Therefore, a significantly lower irradiance can be used, thus reducing hair damage. Furthermore, the radiation exposure of the person's scalp is reduced.

[0071] Furthermore, the thermal stress from LED irradiation on the head is still tolerable at the desired irradiation intensity. This is not the case with EP 3 137 171 B1. Therefore, individual strands of hair must be treated there as well.

[0072] Since the lighting device described here is intended only to stimulate the photosensitizer, the entire volume of hair does not necessarily need to be exposed uniformly. In the case of EP 3 137 171 B1, individual strands of hair must be irradiated with a light source positioned very close to the respective strand to achieve the desired effect, as otherwise deeper hair would not receive sufficient irradiance. This is not necessary with the lighting device described here, since only the photosensitizer is stimulated, and diffusion processes allow the photosensitizer to reach even deeper hair. Light-assisted bleaching of the entire head is also simpler with the lighting device described here than the strand-by-strand exposure required by EP 3 137 171 B1.

[0073] According to one embodiment, which can be combined with all other embodiments described herein, the first emission wavelength differs from the second emission wavelength by at least 100 nm, in particular by at least 200 nm.

[0074] According to one embodiment, which can be combined with all other embodiments described herein, the first emission wavelength differs from the second emission wavelength by a maximum of 600 nm, in particular by a maximum of 400 nm. The second emission wavelength can therefore differ from the first emission wavelength by at least 100 nm and at most 600 nm, by at least 100 nm and at most 400 nm, by at least 200 nm and at most 600 nm, or by at least 2025-INV-0047 -18- The wavelengths can be distinguished between 200 nm and at most 400 nm. The second emission wavelength can be longer than the first emission wavelength.

[0075] According to one embodiment, which can be combined with all other embodiments described herein, the second light sources emit in a range above 450 nm, in particular above 500 nm, and especially above 550 nm.

[0076] The second set of LEDs emits longer wavelength radiation (light) compared to the first set and can be used for wellness applications, such as creating a pleasant light tone or emitting warming radiation. These second LEDs can emit in the red and near-infrared range, for example, in a range between 650 nm and 900 nm.

[0077] According to one embodiment, the first emission wavelength is in a range of 380 nm to 450 nm, in particular from 380 nm to 450 nm, and in particular from 400 nm to 420 nm, and the second emission wavelength is in a range above 500 nm, and in particular above 550 nm, for example in a range between 600 nm and 900 nm, for example in a range between 600 nm and 700 nm.

[0078] With reference to Figures 3 and 4, the arrangement of the LEDs is explained in more detail. Figure 3 shows an arrangement of LEDs according to an embodiment in which first and second LEDs are used. The first LEDs 210a, 210b, 210c emit light with a first wavelength, for example, 405 nm or 415 nm. The second LEDs 220a, 220b, 220c emit light with a second wavelength, for example, between 600 nm and 700 nm, or between 600 nm and 650 nm. LEDs capable of emitting light at different wavelengths can also be used. By appropriately controlling the LEDs, the desired first or second wavelength can then be selected.This makes it possible to use identical LEDs for the first and second LEDs, with the control signal separating the first LEDs (210a, 210b, 210c), which emit light with a first wavelength, and the second LEDs (220a, 220b, 220c), which emit light with a second wavelength. This allows the ratio of first LEDs (210a, 210b, 210c) to second LEDs (220a, 220b, 220c) to be dynamically adjusted by the control signal.

[0079] For example, LEDs can be used that emit light with a wavelength of 405 nm or light with a wavelength of 415 nm, depending on the control signal. It is also possible to combine two or more LEDs with different wavelengths into a single LED base unit, with each LED base unit representing a light source with a variable wavelength. This can be achieved by controlling the respective base unit. 2025-INV-0047 -19- The intensity and wavelength of each base unit (light source) can be individually adjusted. Several base units can be grouped together as mentioned above.

[0080] It is also possible to use first LEDs that emit light at a first wavelength, second LEDs that emit light at a second wavelength, and third LEDs that emit light at a third wavelength, where the first, second, and third wavelengths are different. In this case as well, LEDs that can emit light at different wavelengths depending on their control signal can be used.

[0081] Both the first LEDs 210a, 210b, 210c and the second LEDs 220a, 220b, 220c are arranged in groups or zones, namely in a first lighting zone (group) 210a or 220a, which runs in a ring shape around the outer edge of the lighting device 200, in a third lighting zone (group) 210c or 220c, which is located in the inner area of ​​the lighting device 200, and a second lighting zone (group) 210b or 220b, which runs in a ring shape around the third lighting zone 210c or 220c and is arranged between the third lighting zone 210c or 220c and the first lighting zone 210a or 220a. The LEDs of the first lighting zone 210a and 220a are drawn as squares, the LEDs of the second lighting zone 210b and 220b are drawn as hexagons, and the LEDs of the third lighting zone 210c and 220c are drawn as circles. For clarity, the first and second LEDs are shown with different hatching patterns.

[0082] The lighting device 200 shown in Figure 3 can, for example, represent one of the elements 113a, 113b, 114a, 114b. The first LEDs 210a, 210b, 210c and the second LEDs 220a, 220b, 220c can be controlled independently of one another by the control device. The control device is not shown in Figure 3. Additionally, the individual groups (lighting zones) can be controlled independently of one another. In the embodiment shown in Figure 3, there are therefore a total of six groups of LEDs that can be individually controlled.

[0083] In the embodiment shown in Figures 1 and 2, it is advantageous to increase the density of the light sources at the periphery compared to the center, to supply the light sources at the periphery with a stronger current (i.e., to control them more strongly via the control device), and / or to select a slightly different emission direction compared to the light sources in the center. This allows areas of the head that are not directly covered by the respective elements 113a, 113b, 114a, and 114b to be illuminated by appropriate alignment and control of the light sources. Thus, the intermediate area can also be illuminated. Figure 1, for example, indicates that the head elements 114a and 114b illuminate an area larger than their lateral extent. The area covered by the respective element 113a, 113b, 2025-INV-0047 -20- The area illuminated by 114a, 114b can partially overlap with an area illuminated by a neighboring element 113a, 113b, 114a, 114b. For example, it is possible to increase the density of the light sources, i.e., to reduce their lateral spacing compared to the light sources in the middle and to allow the outer light sources to radiate slightly outwards. This can be combined with group (zone) control.

[0084] Figure 4 shows a lighting device according to one embodiment to illustrate the superposition of the light cones 312, 323, 332 of adjacent LEDs 310, 320, 330. The light cones 312, 322, 332 are shown with dotted lines, the respective optical axis 313, 323, 333 of the individual LEDs 310, 320, 330 is shown with dashed lines, and the virtual surface 360, which represents the outer shape of a head, is shown with dashed lines.

[0085] The LEDs 310, 320, and 330 are arranged on a support device 350, in this case with equal lateral spacing. However, the lateral spacing can also vary. For example, the lateral distance can decrease towards the edge of the lighting device 300. The LEDs 310, 320, and 330 can be individually controlled via a control device 340, as shown in Figure 4. Each LED 310, 320, or 330 can also represent a group of LEDs, as shown, for example, in Figure 3.

[0086] Each LED 310, 320, 330 can be equipped with a lens device (collimator) 311, 321, 331 to focus the emitted radiation and form more tightly focused light cones 312, 322, 332. The lateral spacing (distance between adjacent LEDs) of the individual LEDs 310, 320, 330 is chosen such that the light cones 312, 322, 332 of adjacent LEDs 310, 320, 330 overlap in the virtual area 360. The LEDs 310, 320, 330 can also have different lens devices, for example, with different degrees of light focusing, in order to compensate for edge effects.

[0087] By using the lens devices 311, 321, 331, it is possible to position the LEDs at a greater distance from the virtual surface (head surface). Likewise, it is possible to widen the respective light cone 312, 322, 332 more significantly using the lens devices 311, 321, 331, in order to achieve a uniform irradiance even at shorter distances.

[0088] Figure 5 shows a schematic view of an arrangement for evaluating the irradiance distribution. For this purpose, LEDs 530 are arranged in a plane 500, which here represents the outer contour. The LEDs 530 are arranged in a grid, with the LEDs 530 being closer together at the left and right edges. This is advantageous, for example, for elements 113a, 113b, 114a, and 114b. The irradiance is 2025-INV-0047 -21- then determined for various virtual surfaces 510, 520 which are located at a predefined distance D from the outer contour.

[0089] LEDs are assumed to be Lambertian emitters with a rectangular base of 1 mm x 1 mm. The virtual areas 510 and 520 shown are assumed to be detector areas and correspond in size to the extent of the LED grid shown (plus one LED spacing). The detector areas, i.e., the virtual areas 510 and 520, are assumed to be at various distances from the LED grid, with distances D from 0 mm to 100 mm in 5 mm increments.

[0090] The simulated results are given as irradiance distributions in W / mm². 2 shown on the respective detector surface, i.e. the virtual surface placed at a certain distance D, with the results slightly smoothed.

[0091] Figures 6A to 6F show simulations of the irradiance as a function of the distance D of a virtual surface 510, 520 from the lighting device (in the plane 500). The distance D is shown above the illustration in each case and is 5 mm (Figure 6A), 30 mm (Figure 6B), 45 mm (Figure 6C), 55 mm (Figure 6D), 70 mm (Figure 6E), and 85 mm. (Figure 6F). As can be seen in Figure 6A, the spatial density of the LEDs is higher at both the right and left edges. However, it is also possible to choose a uniform spatial distribution of the LEDs. The lateral spacing of the LEDs in the center was approximately 50 mm.

[0092] At a distance D of 5 mm (Figure 6A), the exposure is still strongly point-like. The light cones do not yet overlap.

[0093] At a distance D of 30 mm (Figure 6B) the light cones already overlap, but the spatial distribution of the irradiance is still uneven.

[0094] At a distance D of 45 mm (Figure 6D), a very uniform distribution of irradiance is already achieved, which improves further with increasing distance D. At 70 mm (Figure 6E), a homogeneous distribution of irradiance is visible in the central area. By appropriately controlling the LEDs, this homogeneous distribution can also be extended to the edge of the area.

[0095] The color and gray values ​​shown in Figures 6A to 6F have been rescaled for each figure and therefore do not allow a direct absolute comparison between them. The scale value is always indicated on the right. The irradiance curve along the vertical line is also shown there. In Figures 6A and 6B, a clearly wavy profile is still visible; that is, the distribution of the underlying LED grid is still discernible up to a distance D of 30 mm. In Figures 6C to 6F, the profile is already significantly more homogeneous. However, the irradiance gradually decreases. 2025-INV-0047 -22- with distance D. In addition, the edge fall-off increases with increasing distance D. If the 530 LEDs are arranged closer together, a uniform distribution is achieved even at distances of less than 30 mm. To prevent excessive irradiation, the 530 LEDs can be supplied with a correspondingly lower current to reduce their emission intensity.

[0096] The following irradiance values ​​were determined at the location of the crosshairs shown in Figures 6A to 6F and are listed in Table 1. The crosshairs are positioned at the projection point of an LED 530 on the virtual surface. It can be seen that a very high irradiance is still present at a distance D of 5 mm. At distances D of 20 mm and 25 mm, the irradiance is already in a range where damage is only conditionally likely, even though at these distances D, with the lateral spacing of the LEDs 530 chosen here, the irradiance is still very uneven (see Figure 6B for distance D = 30 mm). Table 1

[0097] The control device 340 is used, in particular, to adjust the average current supplied to the individual LEDs 310, 320, 330. Pulse-width modulation of the current can be used for this control.

[0098] To verify the above simulation, a lighting device with LTPL-C034UVH405 LEDs and an emission wavelength of 405 nm was used. 2025-INV-0047 -23- The maximum optical output power per LED was approximately 1000 mW. It was confirmed that at a distance D of 1 to 70 cm, particularly at a distance D of 3 to 25 cm, and especially at a distance D of 3 to 15 cm, a sufficiently uniform distribution of irradiance can be achieved which is sufficient to excite a photosensitizer to the formation of singlet oxygen.

[0099] The following radiometric considerations can be used as a basis for the arrangement of the LEDs.

[0100] A flat, square grid of LEDs with spacing a (without limiting the size of the grid, i.e., without considering edge effects) and an LED output flux (power) P produces an average radiant intensity E of E = P / a 2 .

[0101] The target irradiance E should be 50 mW / cm² 2 Assuming a power output of P = 1000 mW for each LED, this results in... a lateral distance a between adjacent LEDs of a = 45 mm, or 20 cm 2 Area per LED.

[0102] In this idealized case, the irradiance at a distance D from the LEDs (approximately 1.2 * a) no longer depends on the lateral distance from the LEDs. The light at a point on the detector (virtual area) is simply composed of contributions from an increasing number of LEDs, with the individual contribution of each LED decreasing with distance D.

[0103] However, with a limited size of the LED grid, a distance-dependent loss of light intensity and edge falloff must be expected, as already seen in connection with Figures 5 and 6A to 6F. Therefore, the LED spacing can preferably be set smaller.

[0104] Figures 7, 8A and 8B illustrate a simulation based on this.

[0105] Figure 7 shows another schematic view of an arrangement for evaluating the irradiance distribution. For this purpose, LEDs 730 are arranged in a plane 700, which here represents the outer contour. The LEDs 730 are arranged in a regular 7x7 grid. The virtual areas 720 and 740 are positioned at a distance D from the outer contour, with their area being smaller than that of the outer contour. This allows for the evaluation of edge effects. 2025-INV-0047 -24- avoid. The perpendicular projection 710 of the virtual surfaces 720, 740 onto the plane 700 is shown as a dotted line.

[0106] For the irradiance distribution shown in Figures 8A and 8B, the 7 x 7 LEDs were assumed to be spaced 35 mm apart laterally. This placed one LED in the center.

[0107] The detector size corresponds to the size of the virtual areas 720, 740 shown in Figure 7, each of which has a size corresponding to a square with a side length of 3 LED spacings, i.e. 105 mm x 105 mm.

[0108] Figure 8A shows the irradiance distribution for two virtual surfaces spaced at a distance of D = 30 mm and D = 50 mm, respectively. Simulations showed that a sufficiently homogeneous distribution is present even at a distance of 30 mm, becoming even more uniform with increasing distance D. The profile along the vertical line is shown on the right. The irradiance varied slightly within each virtual plane. The regions are shown in Table 2. Table 2

[0109] The target value is 50 mW / cm² 2Irradiance was still achieved even at a distance D = 100 mm, but with a lateral spacing of 35 mm between the LEDs instead of the ideally calculated 45 mm. Therefore, it is more advantageous to set the lateral spacing of adjacent LEDs slightly smaller than the ideal spacing a. The lateral spacing of adjacent LEDs can thus be, for example, between 0.7 * a and 0.9 * a. By specifying the radiant intensity (power) P of the LEDs and the desired irradiance E, the preferred average lateral spacing a can be determined. If a lower irradiance is desired, e.g., 30 mW / cm², the lateral spacing can be adjusted accordingly. 2 , then this can be achieved by appropriately adjusting the control of the LEDs, without having to adjust the 2025-INV-0047 -25- spatial distribution of the LEDs is required. Thus, in the above example, an irradiance of, for example, 30 mW / cm² can optionally be used. 2 or 50 mW / cm2 This can be achieved at a distance D of, for example, 20 cm, by controlling the LEDs accordingly, for example by controlling the current using pulse width modulation via the control device.

[0110] Figure 9 shows the mean irradiance E (avg .) of the simulation as a function of the distance D, where the extent of the virtual area is 105 mm x 105 mm, as assumed in the preceding simulation.

[0111] A lighting device according to a further embodiment is explained with reference to Figures 10A to 10C, wherein Figure 10A shows a 3-dimensional overall view, Figure 10B shows a 3-dimensional sectional view, and Figure 10C shows a modification.

[0112] The lighting device 900 comprises a support device 910, which is designed in a hood-like or bowl-like shape. As shown in Figure 10A, the support device 910 comprises a plurality of curved first webs 911 extending radially from a central point 913. If the support device 910 is viewed as a downwardly open hemispherical shell, then the central point 913 is located above the head 950 indicated in Figure 10A. The first webs 911 extend laterally and downwardly from the central point 913, curving around approximately the upper half of the head 950.

[0113] Second ribs 912 run around the head, here formed in the form of concentric rings 912, with the ring with the largest diameter located at the lower end of the first ribs 911. From the lower end of the first ribs 911 towards the center point 913, the diameter of the rings 912 decreases.

[0114] The support structure 910, composed of radially arranged arcuate first struts 911 and annular second struts 912 intersecting the first struts 911, creates a curved network to which the LEDs (light sources) 920 can be attached. Since, when the illumination direction is used as intended, the center point 913 is at the top and the support structure 910 is curved downwards, the first struts 911 can also be referred to as meridians (circles of longitude) and the second struts 912 as parallels. The support structure 910 therefore generally has the form of an approximately hemispherical network.

[0115] The shape does not have to be strictly hemispherical. It is also possible to design the support device 910 with a more oval shape.

[0116] The bending radius of the first webs 911 is chosen such that the support device 910 runs spaced around the head 950. On the inside of the first and second webs 2025-INV-0047 -26- A plurality of LEDs 920 are arranged on 911, 912, radiating towards the interior of the hemispherical support structure 910. As already explained, the curved surface defined by the LEDs 920 represents the outer contour of the interior. In the embodiment shown here, the individual LEDs 920 are attached to the second ribs (rings) 912, but not to the first ribs 911, so that the lighting device 900 has groups of ring-shaped LEDs 920. However, the LEDs 920 can also be arranged on the first ribs 911 or on the first ribs 911 and the rings 912.

[0117] The LEDs 920 can be arranged so that the lateral distance between adjacent LEDs 920 is approximately the same. However, it is also possible to vary the lateral distances. For example, the lateral distances of the LEDs in the area of ​​the back of the head and in the upper region, i.e., towards the center 913, can be smaller than in the area of ​​the front of the head in order to reduce the strain on the facial area from the radiation emitted by the LEDs 920.

[0118] As explained above in connection with Figures 3 and 4, LEDs 920 emitting light of different wavelengths can be used. The explanations given in connection with Figures 3, 4, 5, 6A to 6F, 7 and 8A to 8B also apply analogously to the LEDs 920 of the lighting device 900.

[0119] The optical axis of the LEDs 920, which is not shown in Figures 10A to 10C, is essentially oriented perpendicular to the outer contour, so that the LEDs 920 shine perpendicularly onto the virtual plane, which is represented here by the schematically indicated head.

[0120] Figure 10C schematically shows an extension 915 of the support device 910. The support device 910 can extend further downwards in the area of ​​the back of the head and neck, creating a lighting device 900 that completely surrounds the upper part of the head 950 and only the lateral and posterior areas of the lower part of the head 950. No support device is arranged in the area of ​​the face.

[0121] The extension 915 can be formed by lengthening some of the first bridges 911 and by adding partial rings (not shown) connected to the extended first bridges 911. LEDs can be attached to the partial rings, to the extended first bridges 911, or to both. This modification makes it possible to illuminate even long hair. 2025-INV-0047 -21-

[0122] The irradiation device 100, 900 can be used for the optical excitation of a photosensitizer contained in a bleaching agent to stimulate it to form singlet oxygen for bleaching hair. The bleaching agent comprises (A) at least one first photosensitizer capable of generating singlet oxygen upon light excitation, (B) at least one persulfate salt, (C) at least one alkalizing agent, and (E) at least one hydrogen peroxide source. The bleaching agent is applied to the hair and then irradiated using the irradiation device 100, 900, for example, for a period of 1 min to 60 min, in particular 3 min to 40 min, and in particular 5 min to 30 min. It is also possible to select shorter or longer irradiation times, for example 1 min to 15 min, 3 min to 20 min, or 10 min to 60 min.

[0123] Further details regarding preferred photosensitizers and the bleaching agent are explained above. Reference is also made to WO 2024 / 246147 A1, mentioned above, the full disclosure of which is hereby incorporated.

[0124] For longer hair, individual strands can be placed on foils, and then the bleaching agent applied to the strands. The foils support the hair strands and make it easier to treat them individually. For irradiation, the foils can be folded over the hair, especially if it is longer. This increases the "volume" of the head, i.e., the area covered. This increase in "volume" can also be taken into account when sizing the 100, 900 light fixture, as explained above.

[0125] The films used are primarily translucent, especially those that allow visible light to pass through. This allows the light emitted by the LEDs to reach deeper strands of hair, resulting in even bleaching.

[0126] With reference to Figures 11A to 11G, a lighting device 1100 according to a further embodiment is shown. Here, the terms "top," "bottom," "front," "back," "side," etc., are used in their normal meanings, with "back" referring to the side to which the support device is attached to a stand. The opposite side is the front side, or simply "front."

[0127] The lighting device 1100 according to Figures 11A to 11G has a support device 1110 which, in its design, is essentially shell-shaped or helmet-shaped and can almost completely surround a human head, leaving the face uncovered. The support device 1110 is height-adjustable on a 2025-INV-0047 -28- Stand 1115 is attached. At its lower end, stand 1115 has a frame 1120 with rollers so that the entire device can be moved easily.

[0128] The stand 1115 further comprises a telescopic column 1122, which carries a holding device 1105 at its upper end. The holding device 1105, in turn, carries the support device 1110, which can be arranged to be horizontally displaceable on the holding device 1105 via an arm 1106. The height of the support device 1110 can be adjusted via the telescopic column 1112. This can be done manually or by means of a lifting device (not shown in detail here). For this purpose, the stand 1115 can have operating elements 1123, for example pushbuttons, by means of which predefined height settings or any desired height settings can be controlled by a motor. This is shown in Figure 11G.

[0129] The control device can be housed in the holding device 1105 or in the support device 1110. Therefore, the control device is not visible in Figures 11A to 11G.

[0130] The lighting device 1100 is designed to have a closed outer form. In particular, the support device 1110 can have a head element 1114 and two wing elements 1113 arranged on the head element 1114. The head element 1114 and the two wing elements 1113 together form a closed outer form, with the two wing elements 1113 in particular defining a lower access opening 1116 to the interior 1111.

[0131] The head element 1114 can have the form of a shell open downwards, i.e., towards the interior 1111. Additionally, the head element 1114 can have a downwardly extending fastening section 1118 on its rear side, i.e., towards the stand 1115, which extends downwards over the edge of the "shell".

[0132] The fastening section 1118 can, for example, be used to fasten the support structure 1110 to the stand 1115.

[0133] In particular, the fastening section 1118 of the head element 1114 can be connected to the holding device 1105. For this purpose, the fastening section 1118 of the head element 1114 can, for example, be rigidly connected to the arm 1106. The arm 1106 extends from the outside of the fastening section 1118 of the head element 1110 towards the holding device 1105 and is mounted in the holding device 1105 so as to be horizontally displaceable. The holding device 1105 can have operating elements 1107 by means of which a horizontal displacement of the arm 1106 relative to the holding device 1105 is effected. 2025-INV-0047 -29- can be achieved, for example, by controlling an actuator. This makes it easier for the user to operate.

[0134] The wing elements 1113 can be pivotably arranged on the head element 1114. When the lighting device 1110 is used as intended, the head element 1114 surrounds, in particular, the upper part of the head. When the lighting device 1110 is used as intended, the two wing elements 1113 are located on opposite sides of the head. By pivoting the wing elements 1113 laterally, the clear width of the access opening 1116 can be increased, thus facilitating access to the interior 1111. Furthermore, the customer undergoing cosmetic treatment with the lighting device 1110 does not feel as if they have to put their head through an excessively narrow access opening. This improves customer acceptance. In addition, the pivotable wing elements 1113 facilitate cleaning of the interior 1111 after use.

[0135] As already explained in connection with Figure 10C, the support device 1110 of the lighting device 1100 can further comprise an extension 1160, which can be arranged, for example, at a rear lower end of the head element 1113. The extension 1160 can be removably arranged on the head element 1113, for example, by means of a magnetic holder 1161. For this purpose, magnets can be provided on the head element 1113 and / or on the extension 1160, which enable secure attachment and alignment of the extension 1160 on the head element 1113.

[0136] In particular, the fastening section 1118 of the head element 1114 can have a fastening interface 1117 at its lower end, to which the extension 1160 can be detachably attached with its fastening interface 1163. Figure 11E shows the extension 1160 removed from the head element 1113 of the support device 1110.

[0137] The mounting interface 1163 of the extension 1160 can have magnets 1161 which interact with magnets (not shown) of the mounting interface 1117 of the mounting section 1118 and securely hold the extension 1160 to the head element 1114. Furthermore, the mounting interface 1163 of the extension 1160 can have electrical contacts 1161, for example pins, which make contact with corresponding electrical contacts of the mounting interface 1117 of the extension 1160.

[0138] The wing elements 1113 can, for example, be pivotably mounted on the fastening section 1118, in particular on each side edge 1119 of the fastening section 1118. 2025-INV-0047 -30-

[0139] The wing elements 1113 can be pivoted outwards, particularly to the side. Each wing element 1113 can be pivoted outwards individually. As can be seen, for example, in Figures 11A, 11B, and 11F, each wing element 1113 tapers towards its front end. This ensures that the customer's view "outwards" is not obstructed. At the same time, it ensures that the wing elements 1113 extend further downwards in the side area, thus allowing illumination of the head and hair.

[0140] The ability to open the wing elements 1113 outwards improves both customer access to the interior 1111 and facilitates cleaning. Furthermore, the wing elements 1113 allow the user, such as a stylist, easier access to the customer's head and hair during a treatment. This enables them to manipulate specific sections of hair, such as to apply cosmetic products, or simply to monitor the progress of the treatment. This eliminates the need to remove the lighting device 1100, which would interrupt the treatment and extend its duration.

[0141] The enclosed helmet or hood shape of the lighting device ensures even illumination and a controlled environment inside the 1111. Furthermore, the enclosed design facilitates cleaning.

[0142] The two wing elements 1113 and the head element 1114 each have an inner surface which together define and surround the interior space 1111, particularly when the two wing elements 1113 are closed. The inner surfaces can merge almost seamlessly into one another. This can also apply to the extension 1160, i.e., its inner surface also defines and surrounds the interior space 1111.

[0143] The head element 1114 and the two wing elements 1113 each have a plurality of LEDs 1130 (light sources), as shown in Figure 11F, whereby, as already described above, the arrangement and type of the light sources can vary. For example, it is possible that LEDs for emitting light in different wavelength ranges (first and second light sources) are arranged in patterns in both the head element 1114 and the two wing elements 1113. If the lighting device 1110 has the extension 1160, it can also have LEDs.

[0144] Figure 11C shows a section along a sagittal plane of the lighting device 1100, and Figure 11D shows a section along a frontal plane of the lighting device 1100. The sagittal plane cuts the lighting device 1100, viewed from the front, into a right and left half. In contrast, the 2025-INV-0047 -31- In the frontal plane, the lighting device 1100 is divided into a front and a rear half. These sectional views show that the lighting device 1100 is designed to surround a human head 1150 such that the head 1150 is approximately equidistant from the outer contour 1112 of the interior space 1111. Figures 11C and 11D indicate the front distance Dv, the rear distance Dh, the upper distance Do, and the lateral distances Ds of the head 1150 from the outer contour 1112 of the interior space 1111. The surface of the head is considered the virtual surface here.

[0145] The front distance Dv, the rear distance Dh, the top distance Do, and the lateral distances Ds are specific values ​​of the distance D and lie approximately in the same range, although they may differ slightly. For example, the lateral distances Ds may be somewhat larger than the top distance Do, since a small lateral distance, in particular, can be perceived as restrictive by the person in question. To prevent different distances from causing uneven exposure, the LEDs (not shown in Figures 11C and 11D) can be controlled differently by the control device to counteract uneven exposure.

[0146] In the lighting device 1100 shown in Figures 11C and 11D, a head 1150 with a head circumference of 58 cm is depicted. The upper distance Do between the outer contour 1112 and the scalp can be, for example, between 10 and 15 cm, for example, 11.5 cm. The lateral distances Ds, which here are taken between the respective ear and the outer contour, can also be, for example, between 10 and 15 cm, for example, 13.5 cm. Accordingly, the anterior distance Dv and the posterior distance Dh can each also be, for example, between 10 and 15 cm, for example, 12.8 cm each. The posterior distance Dh is measured from the point of the head 1150 projecting furthest to the rear, while the anterior distance Dv is measured from the forehead area immediately above the eyes.

[0147] The interior space 1111 can therefore have an approximately semi-spherical outer contour 1112. The outer contour 1112 can have a mean diameter, measured at a mean height, of, for example, between 42 and 50 cm.

[0148] In Figures 11C and 11D, the LEDs are not shown separately. However, as explained above in connection with Figures 3 to 5, 6A to 6F, 7, 8A, 8B and 9, they can be arranged and controlled accordingly.

[0149] Figure 11 H shows once again that the LEDs can be controlled in groups. For this purpose, the LEDs 1130 are divided into group A and group B as an example. The LEDs 1130 of group A are, for example, arranged in the area of ​​the extension 1160. 2025-INV-0047 -32- In contrast, LEDs 1130 of group B are located in the area of ​​the head element 1114 and the wing elements 1113. In Figure 11H, the LEDs of group A are off, while those of group B are on. If, for example, a customer has rather short hair, then only the LEDs 1130 of group B (head element 1114 and wing elements 1113) need to be activated, but not the LEDs 1130 of group A (extension 1160). This reduces light exposure and energy consumption, which leads to less heat generation inside the interior 1111.

[0150] Basically, the LEDs 1130 can be divided into any group, for example the LEDs in the head element 114 can form a group, the LEDs of each wing element 1113 can form a group, and the LEDs 1130 of the extension 1160 can also form a group, so that there are at least four groups of LEDs in total.

[0151] Each of these elements can also have two groups of LEDs, for example, one group of the first LEDs mentioned above and one group of the second LEDs mentioned above. The groups can be arranged in interpenetrating patterns, such that, for example, LEDs from the two groups alternate. The spatial density of LEDs in the two groups can be the same or different. For example, the density of the first LEDs, which emit in a range of 390 nm to 430 nm, especially in a range of 400 nm to 420 nm, can be greater than that of the second LEDs, which emit in a range above 550 nm, for example in a range between 600 nm and 900 nm.

[0152] As explained above, third LEDs can also be provided, emitting in a third wavelength range that differs from the first wavelength range of the first LEDs and the second wavelength range of the second LEDs. These third LEDs can also be arranged in patterns, with the spatial density of the LEDs in the third group being equal to or different from the spatial density of the LEDs in the first and / or second groups.

[0153] For example, the first LEDs of the first group and the second LEDs of the second group can be arranged alternately in horizontal strips.

[0154] It is also possible that the first group of LEDs contains subgroups that can be individually controlled. Likewise, each LED, or at least a pair of LEDs in the first group, can be individually controlled to achieve the most homogeneous illumination possible. This is particularly advantageous for the LEDs in the first group that excite the photosensitizer. 2025-INV-0047 -33-

[0155] In principle, the LEDs of the second or even the third group can also be subdivided into individual subgroups that can be controlled separately.

[0156] The lighting device described here allows for group or individual control of the LEDs, thereby enabling homogeneous illumination of the head with a defined energy input. This makes it possible for the first time to achieve light-assisted homogeneous illumination around the entire head, particularly when using photoinduced singlet oxygen generation with photosensitizers such as the phenalenones and phenalenone derivatives mentioned here.

[0157] With reference to Figures 12A to 12F, a lighting device 1200 according to a further embodiment is described. This embodiment may be a modification of the embodiment shown in Figures 11A to 11H, so that these can be considered together. This embodiment differs from the embodiments described above, particularly in the specific design of the support device. However, the type and arrangement of the LEDs correspond in principle to the embodiments already described above, so reference is made to these in full. Figures 12A to 12F show various views and partial views of the lighting device 1200. The following description is given with reference to these figures.

[0158] The lighting device 1200 comprises a support device 1210, which essentially corresponds to the design of the support device 1110 of the lighting device 1100. Figure 12A shows a parlor chair in addition to the lighting device 1200 only for size comparison. The lighting device 1200 can be arranged such that the support device 1210 is positioned above the backrest of the parlor chair to surround the customer's head.

[0159] When the support device 1210 is mentioned below, this refers to both the internal structure and the internal structure concealed by the outer shell of the support device 1210.

[0160] As already explained, for example, in connection with the embodiment of Figures 11A to 11D, the lighting device 1200 comprises a stand 1215 which has a frame 1220 on casters at its lower end to allow the lighting device 1200 to be positioned freely in space. The stand 1215 further comprises a telescopic column 1222 which has a holding device 1205 at its upper end. The holding device 1205 serves, on the one hand, to hold the support device 1210 of the lighting device 1200. In addition, the holding device 1205 can accommodate at least part of the control device (not shown). 2025-INV-0047 -34- However, the control device can also be partially or completely housed in the support device 1210.

[0161] The telescopic column 1222 allows the height of the support device 1210 to be adjusted. As already explained in connection with Figures 11A to 11D, a lifting device (not shown) can be integrated into the stand 1215 for this purpose. The support device 1205 can also have a control panel 1270 with operating elements, such as pushbuttons, via which predefined height settings or any desired height settings can be controlled. This control panel 1270 is shown in Figure 12D. The control panel 1270 can, for example, have several pushbuttons 1271 via which a preset height setting can be selected. The presets can be adjusted. By pressing the corresponding pushbutton 1271, the telescopic column 1222 is extended or retracted by means of the lifting device. The control panel 1270 can also have a display 1272, which can show the current or selected height setting.Additionally, the control panel 1270 can also have push buttons 1273 for variable height adjustment. This makes it possible to control a freely selectable height.

[0162] As can be seen in Figure 12D, the holding device 1205 has a base body, the lower end of which is connected to the telescopic column 1222. A lateral holding arm 1206 is attached to the upper end of the holding device 1205, which is connected to and supports the support device 1210. In particular, the arm 1206 is connected to a fastening section 1218, as already described in connection with Figures 11A to 11H, so reference can be made to the corresponding descriptions therein. The fastening section 1218 can, as shown in Figure 12D, be part of the head element 1214, and in particular be connected to an upper section of the head element 1214. The holding device 1205 has an outer casing into which the control panel 1270 with its buttons 1271, 1273 and the display 1272 is integrated.

[0163] The support device 1210 surrounds and defines an interior space 1211 with an access opening 1216 at its lower end. Compared to the access opening 1116 of the embodiment shown in Figures 11A to 11D, the access opening 1216 has a greater opening width. The access opening 1116 is narrower because the wing elements 1113 taper slightly downwards. In contrast, the wing elements 1213 extend straight downwards, so the access opening 1216 is not further constricted.

[0164] As can be seen in Figures 12A to 12G, the lighting device 1200, like the lighting device 1100, comprises a head element 1214 and two side wing elements 1213. The wing elements 1213 are pivotably attached to a rear end of the 2025-INV-0047 -35- The head element 1214 is attached and can each be pivoted outwards and to the side about a vertical axis. The wing elements 1213 are curved and continue the round cross-sectional shape of the head element 1214 downwards without restricting the access opening 1216.

[0165] The head element 1214 has a shape approximately resembling a spherical hemisphere, with the hemisphere open at the bottom. The wing elements 1213 extend the shape of the head element 1214 downwards in an approximately cylindrical form. As can be seen, for example, in Figures 12B, 12E, and 12F, a plurality of LEDs 1230 are arranged, for example, in patterns, on the inner surface of the head element 1214 and the two wing elements 1213. In Figures 12B and 12F, an attempt has been made to depict the LEDs 1230 as illuminated. As explained above, identical LEDs or LEDs emitting in different wavelength ranges can be arranged on the respective inner surfaces of the wing elements 1213 and the head element 1214.For example, it is possible that first LEDs, which emit in a first wavelength range, and second LEDs, which emit in a second wavelength range, are evenly distributed on the inner sides.

[0166] Furthermore, the support structure 1210 can have an extension 1260 which, as explained above, can be detachably attached to a lower rear end of the head element 1214. In particular, this can be done via a magnetic mount. If the extension 1260 also has LEDs 1230 on its inner surface, the magnetic mount can also have electrical contacts to supply and control the LEDs 1230 of the extension 1260.

[0167] The head element 1214 and the two wing elements 1213, when closed, define and enclose the interior space 1211 of the support device 1210. With the optional extension 1260, the interior space 1211 is extended downwards, with this extension occurring primarily at the rear of the support device 1210. The interior surfaces of the head element 1214, the wing elements 1213, and the optional extension 1260 can seamlessly merge into one another.

[0168] For example, in Figure 12F, the wing elements 1213 are pivoted laterally outwards, thus facilitating access to the interior 1211. This also improves access for the customer. At the same time, the interior 1111 is easier to clean.

[0169] The lighting device 1200 further includes a fog device 1290, which may, for example, be integrated into the support structure 1210 and covered by the outer shell of the support structure 1210, so that the fog device 1290 is not directly visible. 2025-INV-0047 -36-

[0170] The fogging device 1290 has one or more fog outlets 1291 and a water tank 1292, which may be removable. Additionally, the fogging device 1290 has an atomizer to convert the water contained in the water tank 1292 into a fog of fine droplets, which can then be released through the one or more fog outlets 1291. Figure 12E shows several fog outlets 1291 directed towards the interior 1211, through which the fog can be released into the interior 1211.

[0171] A cover 1293 can be provided on the outer casing of the support device, allowing access to the water tank 1292. Preferably, the water tank 1292 is removable to facilitate both filling and cleaning. Figure 12G shows the lighting device 1200 with the cover 1293 open, giving the user access to the water tank 1292.

[0172] The 1290 fogging device is specifically designed to produce a "cold" fog. The term "cold" refers to ambient temperature and indicates that an additional heat source is not necessary, although it can be used optionally. The atomizer can be either a high-pressure or ultrasonic atomizer, as in these cases water is not heated and evaporated to create a fog. A cold fog has the advantage of providing a cooling effect while gently moisturizing the hair. This is beneficial for many hair care applications.

[0173] However, it is also possible that the generated cold fog is additionally heated by a heater. For example, the fog could be heated after it has formed, or the water could be heated before the fog is generated. The heater could, for instance, heat the water in water tank 1292 to reach the desired temperature.

[0174] The lighting device 1200 can further include one or more fan devices 1240 to move air through the interior 1211. For example, one fan device can be arranged in the head element 1214 and another fan device in each of the wing elements 1213. The fan devices can be controlled individually or together. Figures 12C and 12D, for example, show a fan device 1240 in the head element 1214 with air inlets 1241. It can also be seen that the wing elements 1213 also have air inlets 1242 and fan devices (not shown in detail). In addition, one or more air outlets 1243 can also be present in the head element 1214.

[0175] It is generally possible that one or more fan devices 1240 draw air from the interior 1211 and expel it to the outside, for example via the air outlets. 2025-INV-0047 -37- 1243 but also via the openings 1241, which then serve as air outlets. In this case, the air inlets 1242 of the wing elements 1213 can also serve as air outlets.

[0176] It is also possible that the one or more fan devices 1240 draw in air from the outside via the air inlets 1242 and 1241 and discharge it into the interior 1211.

[0177] The direction of the airflow caused by the one or more fan devices 1240 can, in principle, be selectively reversed, so that, as described above, air can be blown through the support device 1210 into the interior 1211 or air can be drawn from the interior 1211 through the support device 1210 and discharged to the outside.

[0178] The single or multiple 1240 fan units can perform several functions. Firstly, they can be used exclusively for ventilating and regulating the temperature of the 1230 LEDs and their associated electronics to prevent overheating. This also prevents unwanted heating of the interior 1211, which the customer might find bothersome. Secondly, the single or multiple 1240 fan units can also be used solely for ventilating the interior 1211. In this case, the 1240 fan units can also be used for heat treatment of the hair if the air is additionally heated by a heating element.However, it is also possible that one or more fan devices 1240 perform both functions, for example by first using air drawn in from the outside to cool the LEDs 1230 and the associated electronics, and then heating it to the desired temperature by the heating device before the heated air is released into the interior 1211.

[0179] For ease of operation, the lighting device 1200 can have one or more operating elements 1281, 1282, 1283, 1284 on its front. Figure 12B shows a switch 1281 for turning the lighting device 1200 on and off, a display 1285, and various pushbuttons. For example, the cooling function can be activated or deactivated via pushbutton 1282, with the cooling being achieved in particular by the emission of cold fog generated by the fog device 1290. Different programs can be selected via pushbutton 1284. The selected program's duration can be easily adjusted using pushbutton 1283. Of course, the type and number of operating elements used, as well as their arrangement, are not limited to the embodiment shown in Figure 12B. The operating elements 1281, 1282, 1283, 1284 can, for example, also be located on the rear or side. 2025-INV-0047 -38- of the head element 1214. It is also possible to integrate the operating elements 1281, 1282, 1283, 1284 into the holding device 1205.

[0180] The fog device 1290, as well as the LEDs 1230 and the fan devices 1240, can be controlled via the control device.

[0181] Figures 13A and 13B show a modification of the lighting device shown in Figures 12A to 12G. Therefore, the same reference numerals are used. The lighting device of Figures 13A and 13B has a more spherical outer shape and a slightly differently designed stand 1215 with a holding device 1205 that merges flush with the outer shell of the support structure 1210 along its front longitudinal side.

[0182] Figure 14 shows a further modification of the lighting device shown in Figures 12A to 12G. Here, too, the outer shape is more spherical. In addition, the water tank 1292 is located at the upper end of the support device 1210 and is accessible by opening the lid 1293. Furthermore, the operating elements on the front are arranged slightly differently.

[0183] Figure 15 shows a schematic overview of the control of the lighting devices described here. As explained above, the lighting devices comprise a control device 1555, which can be operated via control elements 1580. The control elements 1580 can be, for example, the switch 1281, the pushbuttons 1282 to 1284, and the display 1285 from Figure 12B. However, the present embodiments are not limited to these, and the control elements 1580 can be selected as desired. For example, a touchscreen can perform the function of the control elements, including a display.

[0184] The control device 1555 can centrally control the function of all functional elements. The functional elements shown here are, in particular, the LEDs 1530, the fog device 1590, and the fan device 1540, as described above. Further functional elements are possible. The interior 1511 of the support device for the lighting devices is shown schematically, with the boundary defined by a head element 1514 indicated by dotted lines and the boundary defined by a wing element 1513 by dashed lines.

[0185] As can be seen in Figure 15, the fog device 1590, the fan device 1540, and several LEDs 1530 are integrated into the head element 1514. The fog device 1590 has access to the interior 1511 via the fog outlet 1591. The fog device 1590 has an optional heater 1593. Similarly, the fan device 1540 has an optional heater 1543. Both the optional heater 1593 and the optional heater 1543 are also controlled by the control device 1555. 2025-INV-0047 -39-

[0186] The wing element 1513 only has LEDs 1530, but can also have a fan device as described above.

[0187] The control device 1555 can, for example, include a memory 1557 and a processor 1556 for executing an executable computer program stored in the memory 1557. Individual parameters of the computer program or specific sequences of the computer program can be changed and / or selected by the user via the controls 1580.

[0188] Memory 1557 can store various sequences for cosmetic treatments, which can be selected by the user via the control elements 1580. After selection by the user, the processor 1556 executes the selected program with the chosen parameters for controlling the functional elements.

[0189] For example, a sequence for controlling the LEDs for the exposure of a photosensitizer for hair bleaching can be stored and selected via the control elements 1580. When the corresponding program is executed, the control device 1555 regulates the intensity of the LEDs 1530 so that the desired irradiance is within the range described above. It is possible for the intensity to vary over time, or for example, for the first and second LEDs to be activated at different times.

[0190] Additionally, during illumination by the LEDs, the control device 1555 can activate the fog device 1590, causing it to generate fog which is then released into the interior 1511 through the fog outlets 1591. The activation of the fog device 1590 can also be delayed in time compared to the activation of the LEDs 1530.

[0191] If required or desired, the control device can simultaneously or subsequently control the fan device 1540 to ventilate the interior 1511.

[0192] The control device 1555 allows for various cosmetic treatment sequences. For example, it is possible to activate only the LEDs 1530 that emit in a longer wavelength range and deactivate other LEDs. For instance, only the second set of LEDs mentioned above, which emit primarily in the red and infrared wavelength ranges, can be activated, while the first set of LEDs remains off. Simultaneously, the fan device 1540 can be activated, optionally with the additional activation of the heating device 1543, so that warm air is directed into the interior while illuminated by the second set of LEDs. 2025-INV-0047 -40- This allows, for example, a wellness treatment so that a customer who has wet hair, for instance, does not catch a cold.

[0193] In principle, all of the aforementioned functional elements can be activated and deactivated simultaneously, sequentially, or repeatedly by the control device 1555. This enables a wide range of applications, meaning that users only need the lighting devices described here for various cosmetic treatments. This reduces the equipment requirements for beauty salon operators. At the same time, personnel costs can also be reduced, as the lighting devices can perform different treatments. Therefore, the lighting devices enable time-, cost-, and energy-saving treatments, since the individual functional elements can be controlled appropriately.

[0194] Figures 16A to 16C show a further modification of the lighting device 1200 of Figures 12A to 12F.

[0195] In the lighting device 1200, as shown in Figure 16A, the water tank 1292 can also be housed in or attached to the mounting device 1205. The fog device can then also be housed in the mounting device 1205. Hoses can then lead, for example, from the fog device arranged in the mounting device 1205 to the fog outlets 1291.

[0196] As can be seen in Figure 16C, the water tank 1292 can be removed for filling or cleaning.

[0197] As can also be seen in Figure 16C, the retaining arm 1206 can be pivotally arranged on the holding device 1205 in order to easily adjust the height of the support device 1210. As described above, the retaining arm 1206 is connected to the fastening section 1218 of the head element 1214.

[0198] It is also possible that the extension 1260 is permanently connected to the head element 1214, i.e., it is not designed as a removable extension.

[0199] The holding device 1205 can, as shown in Figure 16C, have a control panel 1280 with a push button 1282 for activating and deactivating the fog device 1290, as well as a display 1285, specifically indicator LEDs, for showing the operating status. Figures 16A and 16B show that a control panel is also provided on the front of the support structure 1210, as already described above.

[0200] The wing elements 1213 can be locked in their closed position by suitable means, so that the wing elements 1213 do not move during a cosmetic treatment. 2025-INV-0047 -41- to prevent accidental outward opening. A release mechanism 1255 may be provided on the outside of the head element 1214 to unlock the locking device and allow the respective wing element 1213 to be opened.

[0201] Figures 17A to 17C show a further modification of the lighting device of Figures 12A to 12F.

[0202] Figure 17A shows another possible configuration of a lighting device 1200 with a support structure 1210, which comprises a head element 1214, two wing elements 1213 pivotably arranged on the head element 1214, and an extension 1260 detachably attached to the head element 1214. In particular, the two wing elements 1213 can be pivotably mounted laterally outwards on the mounting section 1218 of the head element 1212. The removable extension 1260 can be connected to the mounting interface 1217 located at the lower end of the mounting section 1218, for example via a magnetic holder, as already explained above. Furthermore, the lighting device 1200 can have a stand 1215 which supports the support structure 1210.

[0203] The support structure 1210 also features air outlets 1243 on the head section 1214 to allow the heat generated by the LEDs to be dissipated to the outside. As explained above, a fan device can be provided in the head element 1214 for this purpose.

[0204] Figure 17A shows the support structure 1210 with the wing elements 1213 open. A plurality of LEDs 1230 (light sources) are arranged on the inner surfaces of the head element 1214, the mounting section 1218 of the head element 1214, the wing elements 1213, and the extension 1260. The inner surfaces of these elements together define the interior 1211 of the support structure 1210. This is particularly evident in Figure 17C.

[0205] The inner surfaces of head element 1214, wing elements 1213, and extension 1260 together form a smooth surface that is very easy to clean. These inner surfaces can be coated, for example, with a coating made of a largely inert material. A silicone coating made of a transparent silicone material would be suitable for this purpose.

[0206] Figure 18 shows an interior coating or lining of the interior 1211, using a specific implementation as an example. The silicone coating is recognizable by its glossy surface. In principle, any silicone material is suitable, provided it is transparent to the desired wavelength range. The interior coating also covers the LEDs, preventing accidental contact between the user and the LEDs. 2025-INV-0047 -42-

[0207] In principle, other plastic materials besides silicone can be used, for example, acrylates. However, silicone materials have the advantage of being easy to apply, somewhat softer, and therefore more comfortable to use. They are also more resistant to cleaning agents.

[0208] The support structure 1210, or parts thereof, can be manufactured by press molding or additive manufacturing. It is also possible, for example, to manufacture only the wing elements using additive manufacturing, while the others are manufactured by press molding.

[0209] For example, the elements in the form of a plastic shell made of ABS (acrylonitrile butadiene styrene copolymer) can be manufactured using additive manufacturing processes or by compression molding.

[0210] The inner coating can be applied directly to the inside of the respective element or produced as a separate layer and then, for example, glued on.

[0211] Figure 17B further shows that the water tank 1292 can be integrated into the holding device 1206, i.e., it is not removable. The water tank 1292 is filled via a closable opening 1293.

[0212] Figure 17C further shows that the wing elements 1213 can each have a handle or a handle element 1256 so that the user, for example the stylist, can easily open the wing elements 1213.

[0213] Figure 17C also shows the distributed arrangement of fog outlets 1291, particularly on the inside of all elements (head element including mounting section, wing elements). However, it is also possible that the fog outlets 1291 are arranged only in the head element including the mounting section, and that the wing elements do not have any fog outlets.

[0214] Figure 17C also shows magnets 1264 at the mounting interface 1217 of the mounting section 1218 for attaching the extension 1260 (not shown in Figure 17C). The magnets 1264 interact with the corresponding magnets of the extension.

[0215] The lighting devices described here advantageously enable the performance of various cosmetic or hair cosmetic treatments. The necessary components are suitably integrated into the lighting devices. Therefore, the lighting devices can also be described as multi-purpose devices, as they allow for at least two uses. In particular, the 2025-INV-0047 -43- Lighting devices enable the simultaneous or sequential execution of treatments, particularly those using light, such as bleaching hair with a photosensitizer to generate singlet oxygen, and treatments using a mist. Furthermore, these devices can also be used for drying hair with heated air (air device with heating element) and / or for treatment with warm or hot mist. The various functions can be centrally controlled via the control unit, allowing them to be performed in a desired sequence.

[0216] The lighting devices described here (multi-purpose devices) offer a number of advantages for both the user, for example the stylist, and the customer.

[0217] For example, combining two functions allows for faster treatment, which benefits both the client and the stylist. In particular, the combination of light and cold mist accelerates chemical processes (e.g., coloring or conditioning treatments). Cold mist helps keep the hair evenly moisturized, which is especially advantageous for bleaching. It prevents or reduces hair drying and also provides a cooling effect.

[0218] It is therefore particularly preferred that the fogging device is configured to provide cold fogging.

[0219] In cosmetic treatments, such as during exposure to lightening agents, cold fogging does not need to be continuously active. It is sufficient if the fogging device is activated automatically at regular intervals, for example at pre-selected intervals, or as needed.

[0220] The lighting devices (multi-purpose devices) also offer optimized heat / humidity control compared to conventional methods. This reduces waiting times. For example, applying heat during a cosmetic hair coloring treatment can be beneficial to the coloring process. For this purpose, the corresponding LEDs (light sources), which emit in a wavelength range of 600 to 700 nm, can be activated to gently warm the hair. The LEDs used to activate a photosensitizer can remain inactive. If photosensitizers are also used during hair coloring, then both the LEDs for activating the photosensitizer and the LEDs for heat treatment can be activated. The respective intensity of the LEDs can be adjusted as needed via the control device. 2025-INV-0047 -44-

[0221] Even during cosmetic hair coloring treatments, the hair can be repeatedly moistened by the misting system to ensure optimal conditions for the chemical processes. Improving these conditions can, for example, reduce the number of necessary sessions, as a sufficiently even bleaching result can be achieved in a single session. Previously, this wasn't always possible, often requiring two or more bleaching treatments to achieve a satisfactory result. This represents a significant improvement and a gentler treatment.

[0222] Furthermore, these lighting devices (multi-purpose devices) also allow for gentler application. In particular, the cool mist and controllable temperature prevent heat damage to the hair. Even moisture distribution ensures less stress on the hair structure and scalp.

[0223] Furthermore, the lighting devices (multi-purpose devices) offer increased comfort for both the user and the client. In particular, the helmet-shaped support structure with side flaps allows for easier access for stylists and clients. The water tank, which can be located, for example, on the support structure or in the holder, allows the stylist easy handling and cleaning.

[0224] In particular, low-noise fans are used to further improve customer comfort and well-being, ensuring even air distribution during treatment.

[0225] The lighting devices (multi-purpose devices) thus offer a high degree of flexibility overall, as various applications can be combined. In particular, the combination of light, mist, steam, and hot air allows for various services (e.g., color enhancement, care, styling) within a single device. This means the stylist only needs one device to offer a variety of cosmetic treatments. Furthermore, this opens up entirely new application possibilities for cosmetic treatments, as devices with various integrated functions were previously unavailable.

[0226] The lighting devices (multi-purpose devices) allow for easy adjustment of parameters for treating different hair types and for any application. This enables the stylist to address individual needs. For example, it may be that during a specific treatment 2025-INV-0047 -45- a greater input of moisture is desired to ensure a very gentle treatment.

[0227] The lighting devices (multi-purpose devices) also feature an innovative design and improve handling. The outwardly enclosed design of the support structure (helmet shape with a closed shell) ensures uniform illumination and a controlled environment, as the conditions inside can be very well controlled, which is advantageous, for example, for uniform bleaching or dyeing.

[0228] The side flaps facilitate targeted interventions by the stylist without interrupting the process.

[0229] The inner coating or lining, especially made of a silicone material, not only improves the visual appearance but also significantly simplifies the daily cleaning of the lighting device. Furthermore, the inner coating protects the light sources (LEDs) from accidental contact, thus also protecting the customer from potentially very warm LEDs when they are active.

[0230] The individual control options of the LEDs enable homogeneous illumination of the head with defined energy input, which for the first time allows homogeneous brightening (bleaching) around the entire head, especially when using photoinduced singlet oxygen generation with photosensitizers such as phenalenones and phenalenone derivatives.

[0231] The inner coating or lining with silicone not only allows for effective control of the temperature input to the head, but also increases user comfort when caring for the device, e.g. by simply washing out bleach residues on the inside. EXECUTION FORMS

[0232] In light of the above explanations, various embodiments are described below in a list, which can be suitablely combined with all embodiments described herein. Embodiment 1: Lighting device for hair, in particular for head hair, comprising: 2025-INV-0047 -46- a support device defining an interior space with an outer contour, wherein the interior space of the support device is dimensioned such that the support device is suitable to surround a human head at a distance, a plurality of light sources emitting radiation in the range of 230 nm to 1000 nm, in particular from 380 nm to 1000 nm, in particular from 380 nm to 900 nm, in particular from 380 nm to 800 nm, in particular from 380 nm to 450 nm, and in particular from 400 nm to 420 nm, and which are distributed on the support device, wherein each light source is configured to emit a cone of light directed towards the interior space, and a control device for controlling the light sources, wherein the light sources are arranged and controllable by the control device,that light cones from neighboring light sources partially overlap in a virtual area spaced from the outer contour and have an average irradiance of 5 to 70 mW / cm, 2 , especially 10 to 50 mW / cm² 2 and in particular 25 to 40 mW / cm² 2 in the virtual area, wherein the virtual area extends from the outer contour at a distance of 1 to 70 cm, in particular 1 to 50 cm, in particular 3 to 50 cm, in particular 5 to 25 cm, and the virtual area is intended to represent the contour of a human head. Embodiment 2: Lighting device according to embodiment 1, wherein the Light sources can be controlled in groups by the control device. embodiment 3: Lighting device according to one of the previous Embodiments wherein the light sources comprise first light sources with a first emission wavelength and second light sources with a second emission wavelength different from the first emission wavelength. embodiment 4: Lighting device according to one of the previous Embodiments wherein the light sources are arranged to emit radiation with different wavelengths, such that by selectively controlling the light sources, one part of the light sources emits radiation with a first wavelength and another part of the light source emits radiation with a second wavelength. Embodiment 5: Lighting device according to embodiment 3 or 4, wherein the first emission wavelength differs from the second emission wavelength by at least 100 nm, in particular by at least 200 nm. 2025-INV-0047 -M- Embodiment 6: Lighting device according to one of embodiments 3 to 5, wherein the first emission wavelength differs from the second emission wavelength by a maximum of 600 nm, in particular by a maximum of 400 nm. embodiment 7: Lighting device according to one of the previous Embodiments wherein the light sources or the first light sources emit in a range of 380 nm to 450 nm, in particular in a range of 400 nm to 420 nm. Embodiment 8: Lighting device according to one of embodiments 3 to 7, wherein the second light sources emit in a range above 450 nm, in particular above 500 nm and in particular above 550 nm. embodiment 9: Lighting device according to one of the previous Embodiments wherein each light source has a lens device to shape the light cone directed towards the interior. embodiment 10: Lighting device according to one of the previous Embodiments, wherein the support device has at least two adjustable wing elements which, when the lighting device is used as intended, are located on opposite sides of the head, and at least one head element which, when the lighting device is used as intended, is located above the head, wherein a plurality of light sources are arranged distributed on each wing element and on the head element. Embodiment 11: Lighting device according to embodiment 10, wherein the The wing elements and / or the head element are adjustable in increments. Embodiment 12: Lighting device according to embodiment 10 or 11, wherein the light sources have a smaller lateral distance to the edge of one or each of the wing elements and / or the head element than in the center of the respective element. In particular, the light sources of each of the elements may have a smaller lateral distance to the edge compared to the center of the respective element. Embodiment 13: Lighting device according to one of embodiments 10 to 12, wherein the light sources of one or each of the wing elements and / or the head element at the edge have a different direction of emission than the light elements in the center of the respective element. For example, the light sources at the edge may emit light outwards compared to the light sources in the center. For example, the optical axis of the light sources at the edge may be inclined outwards relative to the optical axis of at least one light source in the center. 2025-INV-0047 -48- Embodiment 14: Lighting device according to one of embodiments 10 to 13, wherein the wing elements are pivotably mounted on the head element, in particular pivotably mounted outwards. embodiment 15: Lighting device according to one of the previous Embodiments wherein the control device is configured to vary the radiant power of individual light sources, groups of light sources, or all light sources over time. embodiment 16: Lighting device according to one of the previous Embodiments wherein the light sources are LEDs. Embodiment 17: Lighting device according to one of embodiments 1 to 9, wherein the support device is shell-shaped, for example in the form of a curved net of struts, and is adapted to completely surround at least an upper part of a human head at a distance. Embodiment 18: Lighting device according to embodiment 16, wherein the The support device comprises a plurality of radially arranged and curved first struts and a plurality of ring-shaped second struts connecting the first struts, with the light sources being attached to the first and / or the second struts. Embodiment 19: Lighting device according to embodiment 16 wherein the The support device has a closed outer shell. embodiment 20: Lighting device according to one of embodiments 16 to 18, wherein the support device has a downwardly extending extension with light sources to also surround the back of the head and neck of the human head. embodiment 21: Lighting device according to one of embodiments 16 to 19, wherein the outer contour of the interior of the support device is approximately semi-spherical and has a mean diameter of approximately 42 to 50 cm. Embodiment 22: Use of a lighting device according to one of the previous embodiments for optically stimulating a photosensitizer contained in a bleaching agent during the bleaching of hair in order to stimulate it to form singlet oxygen, wherein the bleaching agent comprises: (A) at least a first photosensitizer capable of generating singlet oxygen upon light excitation, (B) at least one persulfate salt, (C) at least one alkalizing agent, and 2025-INV-0047 -49- (E) at least one hydrogen peroxide source. Embodiment 23: Use according to embodiment 22, wherein the first photosensitizer is selected from the group comprising phenalenones, turmeric, flavins, riboflavins, phenoxazines, phenothiazines, phthalocyanines, naphthalocyanines, xanthenes, chlorophyll A, chlorophyll B, porphyrins, coumarins, pyrenes, perylenes, acridine orange and tetrapyrroles, wherein the photosensitizer particularly comprises a phenalenone. Embodiment 24: Use according to embodiment 22 or 23, wherein the bleaching agent comprises a second photosensitizer selected from the group consisting of turmeric, flavins, riboflavins, phenoxazines, phenothiazines, phthalocyanines, naphthalocyanines, xanthenes, chlorophyll A, chlorophyll B, porphyrins, coumarins, pyrenes, perylene, acridine orange and tetrapyrroles, wherein the photosensitizer particularly comprises a phenalenone. Embodiment 25: Use according to one of embodiments 22 to 24, wherein the hair is placed on translucent films during optical excitation. Embodiment 26: Lighting device for cosmetic applications, in particular for cosmetic hair applications, especially for head hair, comprising: a support device defining an interior open on one side with an outer contour, wherein the interior of the support device is dimensioned such that the support device is suitable to surround a human head at a distance, at least partially; a plurality of light sources emitting radiation in the range of 230 nm to 1000 nm and in particular from 380 nm to 1000 nm, and which are arranged distributed on the support device, wherein each light source is configured to emit a cone of light directed towards the interior; a fogging device for generating fog, which can be discharged into the interior through fog outlets provided in the support device; and a control device for controlling the light sources and the fogging device. embodiment 27: Lighting device for cosmetic applications according to Embodiment 26, wherein the support device is shell-shaped or helmet-shaped with a closed outer shell and an access opening large enough for a human head. 2025-INV-0047 -50- embodiment 28: Lighting device for cosmetic applications according to Embodiment 26 or 27, further comprising a stand with a movable frame at the lower end of the stand and a telescopic column for supporting the lighting device. embodiment 29: Lighting device for cosmetic applications according to Embodiment 28, wherein a holding device is arranged at the upper end of the telescopic column, which supports the support device. embodiment 30: Lighting device for cosmetic applications according to Embodiment 29, wherein the holding device supports the support device in a horizontally displaceable manner. Embodiment 31: Lighting device for cosmetic applications according to one of embodiments 26 to 30, wherein the light sources emit in the range of 380 nm to 900 nm and in particular from 380 nm to 800 nm, or from 400 nm to 900 nm and in particular from 400 nm to 800 nm. Embodiment 32: Lighting device for cosmetic applications according to one of embodiments 26 to 31, wherein the light sources emit in the range of 380 nm to 450 nm, in particular from 390 nm to 430 nm, and in particular from 400 nm to 420 nm. Embodiment 33: Lighting device for cosmetic applications according to one of embodiments 26 to 32, wherein the light sources are arranged and controllable by the control device such that light cones of adjacent light sources partially overlap in a virtual area spaced from the outer contour and have an average irradiance of 5 to 70 mW / cm² 2 , especially 10 to 50 mW / cm² 2 and in particular 25 to 40 mW / cm² 2 in the virtual area, wherein the virtual area extends from the outer contour at a distance of 1 to 70 cm, in particular 1 to 50 cm, in particular 3 to 50 cm, in particular 5 to 25 cm, and the virtual area is intended to represent the contour of a human head with hair. Embodiment 34: Lighting device for cosmetic applications according to one of embodiments 26 to 33, wherein the light sources can be controlled in groups by the control device. Embodiment 35: Lighting device for cosmetic applications according to one of embodiments 26 to 34, wherein the light sources comprise first light sources with a first emission wavelength and second light sources with a second emission wavelength different from the first emission wavelength. 2025-INV-0047 -51- Embodiment 36: Lighting device for cosmetic applications according to one of embodiments 26 to 35, wherein the light sources are arranged to emit radiation with different wavelengths, such that by selectively controlling the light sources, one part of the light sources emits radiation with a first wavelength and another part of the light source emits radiation with a second wavelength. embodiment 37: Lighting device for cosmetic applications according to Embodiment 35 or 36, wherein the first emission wavelength differs from the second emission wavelength by at least 100 nm, in particular by at least 200 nm. Embodiment 38: Lighting device for cosmetic applications according to one of embodiments 35 to 37, wherein the first emission wavelength differs from the second emission wavelength by a maximum of 600 nm, in particular by a maximum of 400 nm. Embodiment 39: Lighting device for cosmetic applications according to one of embodiments 35 to 38, wherein the second light sources emit in a range above 450 nm, in particular above 500 nm and in particular above 550 nm. Embodiment 40: Lighting device for cosmetic applications according to one of embodiments 26 to 39, wherein the light sources or the first light sources emit in a range of 400 nm to 420 nm. Embodiment 41: Lighting device for cosmetic applications according to one of embodiments 26 to 40, wherein each light source has a lens device to shape the light cone directed towards the interior. Embodiment 42: Lighting device for cosmetic applications according to one of embodiments 26 to 41, wherein the support device has at least two adjustable wing elements which are located on opposite sides of the head when the lighting device is used as intended, and at least one head element which surrounds the upper part of the head when the lighting device is used as intended, wherein a plurality of light sources are arranged distributed on each wing element and on the head element. embodiment 43: Lighting device for cosmetic applications according to Embodiment 42, wherein the wing elements and the head element each have an inner side which together define the interior space. 2025-INV-0047 -52- embodiment 44: Lighting device for cosmetic applications according to Embodiment 42 or 43, wherein the wing elements are pivotably mounted on the head element, in particular pivotably mounted outwards, so that access to the interior of the head element is facilitated. Embodiment 45: Lighting device for cosmetic applications according to one of embodiments 26 to 44, wherein the control device is configured to vary the radiant power of individual light sources, groups of light sources, or all light sources over time. Embodiment 46: Lighting device for cosmetic applications according to one of embodiments 26 to 45, wherein the light sources are LEDs. Embodiment 47: Lighting device for cosmetic applications according to one of embodiments 26 to 46, wherein the support device has a downwardly extending extension with light sources to also surround the back of the head and neck of the human head. embodiment 48: Lighting device for cosmetic applications according to Embodiment 47, wherein the extension is detachably attached to the head element, in particular by means of a magnetic holder. embodiment 49: Lighting device for cosmetic applications according to Embodiment 47 or 48, wherein electrical contacts that come into contact with each other are arranged at the interface between the head element and the extension for supplying the light sources of the extension with electrical energy. Embodiment 50: Lighting device for cosmetic applications according to one of embodiments 26 to 49, wherein the outer contour of the interior of the support device is approximately semi-spherical and has a mean diameter of approximately 42 to 50 cm. Embodiment 51: Lighting device for cosmetic applications according to one of embodiments 26 to 50, wherein the misting device comprises a water tank integrated into the support device. Embodiment 52: Lighting device for cosmetic applications according to one of embodiments 26 to 51, wherein the misting device has an atomizer, in particular an ultrasonic atomizer or a high-pressure atomizer, which is connected to the mist outlets for the release of the mist generated by the atomizer. 2025-INV-0047 -53- Embodiment 53: Lighting device for cosmetic applications according to one of embodiments 26 to 52, wherein the fogging device further comprises a heater for heating the generated fog. Embodiment 54: Lighting device for cosmetic applications according to one of embodiments 26 to 53, further comprising a fan device arranged on the support device to move air through the interior. embodiment 55: Lighting device for cosmetic applications according to Embodiment 54, wherein the fan device further comprises a heating device for heating the air moved by the fan device. Embodiment 56: Lighting device for cosmetic applications according to one of embodiments 53 to 55, wherein the control device also controls the heater, the fan device and the heating device. Embodiment 57: Lighting device for cosmetic applications according to one of embodiments 26 to 56, wherein the control device is set up so that predefined treatment sequences can be carried out, wherein at least two selected from light sources, fog device, and fan device are active simultaneously or sequentially in the predefined treatment sequences. Embodiment 58: Lighting device for cosmetic applications according to one of embodiments 26 to 57, wherein the lighting device is a multi-purpose device for the simultaneous or successive performance of at least two different cosmetic, non-therapeutic treatments of the head and / or head hair of a person. Embodiment 59: Lighting device for cosmetic applications, in particular for cosmetic hair applications, especially for head hair, comprising: a support device defining an interior open on one side with an outer contour, wherein the interior of the support device is dimensioned such that the support device is suitable to surround a human head at a distance, at least partially; a plurality of light sources emitting radiation in the range of 230 nm to 1000 nm and in particular from 380 nm to 1000 nm, and which are arranged distributed on the support device, wherein each light source is configured to emit a cone of light directed towards the interior. 2025-INV-0047 -54- wherein the support device has at least two adjustable wing elements and a head element, wherein a plurality of light sources are arranged distributed on each wing element and on the head element, and a control device for controlling the light sources. embodiment 60: Lighting device for cosmetic applications according to Embodiment 59, wherein the wing elements and the head element each have an inner side which together define the interior space. embodiment 61: Lighting device for cosmetic applications according to Embodiment 59 or 60, wherein the wing elements are pivotably mounted on the head element, in particular pivotably mounted outwards, so that access to the interior of the head element is facilitated. Embodiment 62: Lighting device for cosmetic applications according to one of embodiments 59 to 61, wherein the control device is configured to vary the radiant power of individual light sources, groups of light sources, or all light sources over time. Embodiment 63: Lighting device for cosmetic applications according to one of embodiments 59 to 62, wherein the light sources are LEDs. Embodiment 64: Lighting device for cosmetic applications according to one of embodiments 59 to 63, wherein the support device is shell-shaped or helmet-shaped with a closed outer shell and an access opening large enough for a human head. embodiment 65: Lighting device for cosmetic applications Applications according to one of embodiments 59 to 64, wherein the light sources emit in the range of 380 nm to 900 nm and in particular from 380 nm to 800 nm, or from 400 nm to 900 nm and in particular from 400 nm to 800 nm. embodiment 66: Lighting device for cosmetic applications Applications according to one of embodiments 59 to 65, wherein the light sources emit in the range of 380 nm to 450 nm, in particular from 390 nm to 430 nm, and in particular from 400 nm to 420 nm. Embodiment 67: Lighting device for cosmetic applications according to one of embodiments 59 to 66, wherein the light sources are arranged and controllable by the control device such that light cones of adjacent light sources partially overlap in a virtual area spaced from the outer contour and a 2025-INV-0047 -55- average irradiance of 5 to 70 mW / cm² 2, especially 10 to 50 mW / cm² 2 and in particular 25 to 40 mW / cm² 2 in the virtual area, wherein the virtual area extends from the outer contour at a distance of 1 to 70 cm, in particular 1 to 50 cm, in particular 3 to 50 cm, in particular 5 to 25 cm, and the virtual area is intended to represent the contour of a human head with hair. Embodiment 68: Lighting device for cosmetic applications according to one of embodiments 59 to 67, wherein the light sources can be controlled in groups by the control device. Embodiment 69: Lighting device for cosmetic applications according to one of embodiments 59 to 68, wherein the light sources comprise first light sources with a first emission wavelength and second light sources with a second emission wavelength different from the first emission wavelength. Embodiment 70: Lighting device for cosmetic applications according to one of embodiments 59 to 69, wherein the light sources are arranged to emit radiation with different wavelengths, such that by selectively controlling the light sources, one part of the light sources emits radiation with a first wavelength and another part of the light source emits radiation with a second wavelength. embodiment 71: Lighting device for cosmetic applications according to Embodiment 69 or 70, wherein the first emission wavelength differs from the second emission wavelength by at least 100 nm, in particular by at least 200 nm. Embodiment 72: Lighting device for cosmetic applications according to one of embodiments 69 to 71, wherein the first emission wavelength differs from the second emission wavelength by a maximum of 600 nm, in particular by a maximum of 400 nm. Embodiment 73: Lighting device for cosmetic applications according to one of embodiments 69 to 72, wherein the second light sources emit in a range above 450 nm, in particular above 500 nm and in particular above 550 nm. Embodiment 74: Lighting device for cosmetic applications according to one of embodiments 59 to 73, wherein the light sources or the first light sources emit in a range of 400 nm to 420 nm. 2025-INV-0047 -56- Embodiment 75: Lighting device for cosmetic applications according to one of embodiments 59 to 74, wherein each light source has a lens device to shape the light cone directed towards the interior. Embodiment 76: Lighting device for cosmetic applications according to one of embodiments 59 to 75, wherein the control device is configured to vary the radiant power of individual light sources, groups of light sources, or all light sources over time. Embodiment 77: Lighting device for cosmetic applications according to one of embodiments 59 to 76, wherein the light sources are LEDs. Embodiment 78: Lighting device for cosmetic applications according to one of embodiments 59 to 77, wherein the support device has a downwardly extending extension with light sources to also surround the back of the head and neck of the human head. embodiment 79: Lighting device for cosmetic applications according to Embodiment 78, wherein the extension is detachably attached to the head element, in particular by means of a magnetic holder. embodiment 80: Lighting device for cosmetic applications according to Embodiment 78 or 79, wherein electrical contacts that come into contact with each other are arranged at the interface between the head element and the extension for supplying the light sources of the extension with electrical energy. Embodiment 81: Lighting device for cosmetic applications according to one of embodiments 59 to 80, wherein the outer contour of the interior of the support device is approximately semi-spherical and has a mean diameter of approximately 42 to 50 cm. Embodiment 82: Lighting device for cosmetic applications according to one of embodiments 59 to 81, further comprising a fan device arranged on the support device to move air through the interior. embodiment 83: Lighting device for cosmetic applications according to Embodiment 82, wherein the fan device further comprises a heating device for heating the air moved by the fan device. Embodiment 84: Lighting device for cosmetic applications according to one of embodiments 82 or 83, wherein the control device also controls the heater, the fan device and the heating device. 2025-INV-0047 -57- Embodiment 85: Lighting device for cosmetic applications according to one of embodiments 59 to 84, wherein the two wing elements are located on opposite sides of the head when the lighting device is used as intended, and wherein the head element surrounds the upper part of the head when the lighting device is used as intended. Embodiment 86: Lighting device for cosmetic applications according to one of embodiments 59 to 85, wherein the lighting device is a multi-purpose device for the simultaneous or successive performance of at least two different cosmetic, non-therapeutic treatments of the head and / or head hair of a person. Embodiment 87: Lighting device for cosmetic applications according to one of the previous embodiments, wherein the inside of the support device, in particular the inside of the head element and wing elements, has an internal coating, in particular made of a silicone material. Embodiment 88: Use of a lighting device for cosmetic applications according to one of the preceding embodiments 59 to 87 for carrying out a cosmetic, non-therapeutic treatment of the head and / or head hair of a person, in particular for the cosmetic, non-therapeutic treatment of head hair. Embodiment 89: Use according to embodiment 88, wherein the cosmetic, non-therapeutic treatment is bleaching of the head hair. Embodiment 90: Use according to embodiment 88 or 89, wherein the use is for the optical excitation of a photosensitizer contained in a bleaching agent during the bleaching of hair in order to stimulate the photosensitizer to form singlet oxygen, wherein the bleaching agent comprises: (A) at least a first photosensitizer capable of generating singlet oxygen upon light excitation, (B) at least one persulfate salt, (C) at least one alkalizing agent, and (E) at least one hydrogen peroxide source. Embodiment 91: Use according to embodiment 90, wherein the first The photosensitizer selected is from the group comprising phenalenones, turmeric, flavins, riboflavins, phenoxazines, phenothiazines, phthalocyanines, naphthalocyanines, xanthenes, 2025-INV-0047 -58- Chlorophyll A, Chlorophyll B, Porphyrins, Coumarins, Pyrene, Perylene, Acridine Orange and Tetrapyrroles, wherein the photosensitizer in particular comprises a phenalenone. Embodiment 92: Use according to embodiment 90 or 91, wherein the hair is placed on translucent films during optical excitation. Embodiment 93: Use according to one of embodiments 88 to 92, wherein the cosmetic, non-therapeutic treatment is a treatment of the head hair with a cold mist generated by the mist device. Embodiment 94: Use according to one of embodiments 88 to 93, wherein the cosmetic, non-therapeutic treatment is a treatment of the head hair, a treatment with visible light to strengthen the hair roots. Embodiment 95: Use according to one of embodiments 88 to 94, wherein in cosmetic, non-therapeutic treatment the control device controls the light sources, the fogging device, the fan device in such a way that at least two selected from light sources, fogging device, and fan device are active simultaneously or sequentially.

[0233] Although specific embodiments have been presented and described herein, it is within the scope of the present invention to modify the embodiments shown in a suitable manner without deviating from the scope of protection of the present invention. 2025-INV-0047 -59- REFERENCE MARK LIST 100 Lighting warning 110 Support device 111 Interior 112 Outer contour 113a, 113b Wing element / Element 114a, 114b head element / element 115 stands 116 Swivel joint 117 carriers 200 lighting device 210a First light sources or LEDs / first lighting zone (outdoors) 210b first light sources or LEDs / second lighting zone (center) 210c first light sources or LEDs / third lighting zone (indoors) 220a Second light sources or LEDs / first lighting zone (outside) 220b Second light sources or LEDs / second lighting zone (center) 220c second light sources or LEDs / third lighting zone (indoors) 300 lighting device 310, 320, 330 light sources / LEDs 311, 321, 331 Lens device / Collimator 312, 222, 322 Light cone 313, 323, 333 optical axis 340 Control device 350 support device 500 level / outer contour 510, 520 virtual area 530 Light source / LED 700 Level / Outer contour 710 projection 720, 740 virtual area 730 Light source / LED 900 Lighting device 910 Support device 911 first jetty 912 second bridge / ring 913 Center point 915 Extension of the support device 2025-INV-0047 -60- 920 light source le I LED 950 head 1100, 1200 lighting device 1105, 1205 Holding device I Control device 1106, 1206 Arm I Holding arm 1107 Control element 1110, 1210 Support device 1111, 1211, 1511 Interior 1112, 1212 Outer contour 1113, 1213, 1513 wing element 1114, 1214, 1514 Head element 1115, 1215 Stand 1116, 1216 Access opening 1117, 1217 Mounting interface 1118, 1218 Mounting section 1119 Side edge 1120, 1220 frame 1122, 1222 Telescopic column 1123 Control elements 1130, 1230, 1530 LED / Light source 1240, 1540 fan device 1241, 1242 Fan inlet 1243 Air outlet 1150 head 1255 Unlocking 1256 handle 1160, 1260 Extension of the support device 1161 magnetic bracket 1162 electrical contacts 1163 Mounting interface 1264 magnets 1270 Control panel / Control panel 1271 Button (preselected height setting) 1272 Display (height) 1273 buttons (variable height adjustment) 1280 Control Panel 1281 Switches (On / Off) 1282 buttons (cooling) 2025-INV-0047 -61- 1283 Buttons (time adjustment) 1284 buttons (program) 1285 display 1290, 1590 Fog machine 1291, 1591 Fog outlet 1292 Water tank 1293 Opening for filling the water tank 1593 stokers 1293 lids 1543 Heating device of the fan device 1555 Control device 1556 processor 1557 storage 1580 controls A, B groups of LEDs

Claims

1. 2025-INV-0047 -62- REQUIREMENTS 1. Lighting device for cosmetic applications, in particular for cosmetic hair applications, especially for head hair, comprising: a support device (110, 350, 910, 1110, 1210) defining an interior space (111, 1111, 1211) open on one side with an outer contour (112, 1112), wherein the interior space (111, 1111, 1211) of the support device (110, 350, 910, 1110, 1210) is dimensioned such that the support device (110, 350, 910, 1111, 1210) is suitable to surround a human head at a distance, at least partially, and a plurality of light sources (210a, 210b, 210c, 220a, 220b, 220c, 310, 320, 330, 920, 1230), which emit radiation in the range of 230 nm to 1000 nm and in particular from 380 nm to 1000 nm and which are distributed on the support device (110, 350, 910, 1110, 1210), wherein each light source (210a, 210b, 210c, 220a, 220b, 220c, 310, 320, 330, 920, 1230) is configured to emit a cone of light (312, 322) directed towards the interior (111, 1111, 1211).332), a fog device (1290) for generating fog, which can be emitted into the interior (1211) through fog outlets (1291) provided in the support device (1210), a control device (350, 1205) for controlling the light sources (210a, 210b, 210c, 220a, 220b, 220c, 310, 320, 330, 920, 1230) and the fog device (1290).

2. Lighting device for cosmetic applications according to claim 1, wherein the support device (1110, 1210) is shell-shaped or helmet-shaped with a closed outer shell and an access opening (1116, 1216) that is large enough for a human head.

3. Lighting device for cosmetic applications according to claim 1 or 2, further comprising a stand (1115, 1215) with a movable frame (1120, 1220) at the lower end of the stand (1115, 1215) and a telescopic column (1122, 1222) for supporting the lighting device.

4. Lighting device for cosmetic applications according to claim 3, wherein a holding device (1105, 1205) is arranged at the upper end of the telescopic column (1122, 1222) which supports the support device (1210, 1210). 2025-INV-0047 -63- 5. Lighting device for cosmetic applications according to claim 4, wherein the holding device (1105, 1205) supports the support device (1210, 1210) in a horizontally displaceable manner.

6. Lighting device for cosmetic applications according to one of the preceding claims, wherein the light sources (1230) emit in the range of 380 nm to 900 nm and in particular from 380 nm to 800 nm, or from 400 nm to 900 nm and in particular from 400 nm to 800 nm.

7. Lighting device for cosmetic applications according to one of the preceding claims, wherein the light sources (1230) emit in the range of 380 nm to 450 nm, in particular from 390 nm to 430 nm, and in particular from 400 nm to 420 nm.

8. Lighting device for cosmetic applications according to one of the preceding claims, wherein the light sources (210a, 210b, 210c, 220a, 220b, 220c, 310, 320, 330, 920, 1230) are arranged and controllable by the control device (340, 1205) such that light cones (312, 322, 332) of adjacent light sources (210a, 210b, 210c, 220a, 220b, 220c, 310, 320, 330, 920, 1230) partially overlap in a virtual area (360) spaced apart from the outer contour (112, 1112, 1212) and have an average irradiance of 5 to 70 mW / cm² 2 , especially 10 to 50 mW / cm² 2 and in particular 25 to 40 mW / cm² 2in the virtual area (360), wherein the virtual area (360) extends from the outer contour (112) at a distance of 1 to 70 cm, in particular 1 to 50 cm, in particular 3 to 50 cm, in particular 5 to 25 cm, and the virtual area is intended to represent the contour of a human head with hair.

9. Lighting device for cosmetic applications according to one of the preceding claims, wherein the light sources (210a, 210b, 210c, 220a, 220b, 220c, 310, 320, 330, 920) can be controlled in groups by the control device (340).

10. Lighting device for cosmetic applications according to one of the preceding claims, wherein the light sources comprise first light sources (210a, 210b, 210c) with a first emission wavelength and second light sources (220a, 220b, 220c) with a second emission wavelength different from the first emission wavelength. 2025-INV-0047 -64- 11. Lighting device for cosmetic applications according to one of the preceding claims, wherein the light sources (210a, 210b, 210c, 220a, 220b, 220c, 310, 320, 330, 920, 1230) are configured to emit radiation with different wavelengths, such that by selectively controlling the light sources (210a, 210b, 210c, 220a, 220b, 220c, 310, 320, 330, 920, 1230) a portion of the light sources (210a, 210b, 210c, 220a, 220b, 220c, 310, 320, 330, 920, 1230) emit radiation with a first wavelength and another portion of the Light source (210a, 210b, 210c, 220a, 220b, 220c, 310, 320, 330, 920, 1230) emits radiation with a second wavelength.

12. Lighting device for cosmetic applications according to claim 10 or 11, wherein the first emission wavelength differs from the second emission wavelength by at least 100 nm, in particular by at least 200 nm.

13. Lighting device for cosmetic applications according to one of claims 10 to 12, wherein the first emission wavelength differs from the second emission wavelength by a maximum of 600 nm, in particular by a maximum of 400 nm.

14. Lighting device for cosmetic applications according to one of the preceding claims, wherein the light sources (310, 320, 330, 920, 1230) or the first light sources (210a, 210b, 210c) emit in a range of 400 nm to 420 nm.

15. Lighting device for cosmetic applications according to one of claims 10 to 14, wherein the second light sources (220a, 220b, 220c) emit in a range above 450 nm, in particular above 500 nm and in particular above 550 nm.

16. Lighting device for cosmetic applications according to one of the preceding claims, wherein each light source (210a, 210b, 210c, 220a, 220b, 220c, 310, 320, 330, 920, 1230) has a lens device (311, 321, 331) to shape the light cone (312, 322, 332) directed towards the interior.

17. Lighting device for cosmetic applications according to one of the preceding claims, wherein the support device (110) has at least two adjustable wing elements (113a, 113b, 1113, 1213) which, when the lighting device (100, 1110) is used as intended, 2025-INV-0047 -65- opposite sides of the head, and at least one head element (14a, 114b, 1114, 1214) which surrounds the upper part of the head when the lighting device (100) is used as intended, wherein a plurality of light sources (210a, 210b, 210c, 220a, 220b, 220c, 310, 320, 330, 1230) are distributed on each wing element (113a, 113b, 1113, 1213) and on the head element (114a, 114b, 1114, 1214).

18. Lighting device for cosmetic applications according to claim 17, wherein the wing elements (1113, 1213) and the head element (1114, 1214) each have an inner surface which together define the interior (1111 , 1211).

19. Lighting device for cosmetic applications according to claim 17 or 18, wherein the wing elements (1213) are pivotably mounted on the head element (1114, 1214), in particular pivotably mounted outwards, so that access to the interior (1111, 1211) of the head element (1114, 1214) is facilitated.

20. Lighting device for cosmetic applications according to one of the preceding claims, wherein the control device (340) is configured to vary the radiant power of individual light sources, groups of light sources, or all light sources over time.

21. Lighting device for cosmetic applications according to any of the preceding claims, wherein the light sources (210a, 210b, 210c, 220a, 220b, 220c, 310, 320, 330, 920) are LEDs.

22. Lighting device for cosmetic applications according to one of the preceding claims, wherein the support device has a downwardly extending extension (915, 1160, 1260) with light sources (920, 1230) to also surround the back of the head and neck of the human head.

23. Lighting device for cosmetic applications according to claim 22, wherein the extension (1160, 1260) is detachably attached to the head element (1114, 1214), in particular by means of a magnetic holder (1161).

24. Lighting device for cosmetic applications according to claim 22 or 23, wherein at the interface between head element (1114, 1214) and extension (1160, 2025-INV-0047 -66- 1260) electrical contacts (1163) that come into contact with each other are arranged for supplying the light sources (1230) of the extension (1160) with electrical energy.

25. Lighting device for cosmetic applications according to one of the preceding claims, wherein the outer contour of the interior of the support device is approximately semi-spherical and has a mean diameter of approximately 42 to 50 cm.

26. Lighting device for cosmetic applications according to one of the preceding claims, wherein the misting device (1290) comprises a water tank (1292) which is integrated into the support device (1260).

27. Lighting device for cosmetic applications according to one of the preceding claims, wherein the fogging device (1290) comprises an atomizer, in particular an ultrasonic atomizer or a high-pressure atomizer, which is connected to the fog outlets (1291) for the release of the fog generated by the atomizer.

28. Lighting device for cosmetic applications according to one of the preceding claims, wherein the fogging device (1290) further comprises a heater for heating the generated fog.

29. Lighting device for cosmetic applications according to one of the preceding claims, further comprising a fan device (1240) arranged on the support device (1110, 1210) to move air through the interior (1111 , 1211).

30. Lighting device for cosmetic applications according to claim 29, wherein the fan device (1240) further comprises a heating device for heating the air moved by the fan device (1240).

31. Lighting device for cosmetic applications according to one of claims 28 to 30, wherein the control device also controls the heater, the fan device and the heating device.

32. Lighting device for cosmetic applications according to one of the preceding claims, wherein the control device is configured such that predefined 2025-INV-0047 -67- Treatment procedures are feasible, whereby in the predefined treatment procedures at least two selected from light sources, fog device, and fan device are active simultaneously or sequentially.

33. Lighting device for cosmetic applications according to one of the preceding claims, wherein the lighting device is a multi-purpose device for the simultaneous or successive performance of at least two different cosmetic, non-therapeutic treatments of the head and / or head hair of a person.

34. Lighting device for cosmetic applications, in particular for cosmetic hair applications, especially for head hair, comprising: a support device (110, 350, 910, 1110, 1210) defining an interior space (111, 1111, 1211) open on one side with an outer contour (112, 1112), wherein the interior space (111, 1111, 1211) of the support device (110, 350, 910, 1110, 1210) is dimensioned such that the support device (110, 350, 910, 1111, 1210) is suitable for at least partially surrounding a human head at a distance, a plurality of light sources (210a, 210b, 210c, 220a, 220b, 220c, 310, 320, 330, 920, 1230), which emit radiation in the range of 230 nm to 1000 nm and in particular from 380 nm to 1000 nm and which are distributed on the support device (110, 350, 910, 1110, 1210), wherein each light source (210a, 210b, 210c, 220a, 220b, 220c, 310, 320, 330, 920, 1230) is configured to emit a cone of light (312, 322) directed towards the interior (111, 1111, 1211).332) to emit, wherein the support device (110) has at least two adjustable wing elements (113a, 113b, 1113, 1213) and a head element (14a, 114b, 1114, 1214), wherein a plurality of light sources (210a, 210b, 210c, 220a, 220b, 220c, 310, 320, 330, 1230) are distributed on each wing element (113a, 113b, 1113, 1213) and on the head element (114a, 114b, 1114, 1214), and a control device (350, 1205) for controlling the light sources (210a, 210b, 210c, 220a, 220b, 220c, 310, 320, 330, 920, 1230)., 35. Lighting device for cosmetic applications according to claim 34, wherein the wing elements (1113, 1213) and the head element (1114, 1214) each have an inner surface which together define the interior (1111 , 1211). 2025-INV-0047 -esse. Lighting device for cosmetic applications according to claim 34 or 35, wherein the wing elements (1213) are pivotably mounted on the head element (1114, 1214), in particular pivotably mounted outwards, so that access to the interior (1111, 1211) of the head element (1114, 1214) is facilitated.

37. Lighting device for cosmetic applications according to one of claims 34 to 36, wherein the control device (340) is configured to vary the radiant power of individual light sources, groups of light sources, or all light sources over time.

38. Lighting device for cosmetic applications according to any one of claims 34 to 37, wherein the light sources (210a, 210b, 210c, 220a, 220b, 220c, 310, 320, 330, 920) are LEDs.

39. Lighting device for cosmetic applications according to one of claims 34 to 38, wherein the support device (1110, 1210) is shell-shaped or helmet-shaped with a closed outer shell and an access opening (1116, 1216) that is large enough for a human head.

40. Lighting device for cosmetic applications. Applications according to any one of claims 34 to 39, wherein the light sources (1230) emit in the range of 380 nm to 900 nm and in particular from 380 nm to 800 nm, or from 400 nm to 900 nm and in particular from 400 nm to 800 nm.

41. Lighting device for cosmetic applications. Applications according to any one of claims 34 to 40, wherein the light sources (1230) emit in the range of 380 nm to 450 nm, in particular from 390 nm to 430 nm, and in particular from 400 nm to 420 nm.

42. Lighting device for cosmetic applications according to one of claims 34 to 41, wherein the light sources (210a, 210b, 210c, 220a, 220b, 220c, 310, 320, 330, 920, 1230) are arranged and controllable by the control device (340, 1205) such that light cones (312, 322, 332) of adjacent light sources (210a, 210b, 210c, 220a, 220b, 220c, 310, 320, 330, 920, 1230) partially overlap in a virtual area (360) spaced apart from the outer contour (112, 1112, 1212) and have an average irradiance of 5 to 70 mW / cm 2 , especially 10 to 50 mW / cm² 2 and 2025-INV-0047 -69- especially 25 to 40 mW / cm 2 in the virtual area (360), wherein the virtual area (360) extends from the outer contour (112) at a distance of 1 to 70 cm, in particular 1 to 50 cm, in particular 3 to 50 cm, in particular 5 to 25 cm, and the virtual area is intended to represent the contour of a human head with hair.

43. Lighting device for cosmetic applications according to one of claims 34 to 42, wherein the light sources (210a, 210b, 210c, 220a, 220b, 220c, 310, 320, 330, 920) can be controlled in groups by the control device (340).

44. Lighting device for cosmetic applications according to any one of claims 34 to 43, wherein the light sources comprise first light sources (210a, 210b, 210c) with a first emission wavelength and second light sources (220a, 220b, 220c) with a second emission wavelength different from the first emission wavelength.

45. Lighting device for cosmetic applications according to any one of claims 34 to 44, wherein the light sources (210a, 210b, 210c, 220a, 220b, 220c, 310, 320, 330, 920, 1230) are configured to emit radiation with different wavelengths, such that by selectively controlling the light sources (210a, 210b, 210c, 220a, 220b, 220c, 310, 320, 330, 920, 1230) a portion of the light sources (210a, 210b, 210c, 220a, 220b, 220c, 310, 320, 330, 920, 1230) emit radiation with a first wavelength emits and another part of the light source (210a, 210b, 210c, 220a, 220b, 220c, 310, 320, 330, 920, 1230) emits radiation with a second wavelength.

46. ​​Lighting device for cosmetic applications according to claim 44 or 45, wherein the first emission wavelength differs from the second emission wavelength by at least 100 nm, in particular by at least 200 nm.

47. Lighting device for cosmetic applications according to one of claims 44 to 46, wherein the first emission wavelength differs from the second emission wavelength by a maximum of 600 nm, in particular by a maximum of 400 nm.

48. Lighting device for cosmetic applications according to any one of claims 44 to 47, wherein the second light sources (220a, 220b, 220c) are located in a region above 2025-INV-0047 -70- emit at 450 nm, especially above 500 nm and especially above 550 nm.

49. Lighting device for cosmetic applications according to any one of claims 34 to 48, wherein the light sources (310, 320, 330, 920, 1230) or the first light sources (210a, 210b, 210c) emit in a range of 400 nm to 420 nm.

50. Lighting device for cosmetic applications according to any one of claims 34 to 49, wherein each light source (210a, 210b, 210c, 220a, 220b, 220c, 310, 320, 330, 920, 1230) has a lens device (311, 321, 331) to shape the light cone (312, 322, 332) directed towards the interior.

51. Lighting device for cosmetic applications according to any one of claims 34 to 50, wherein the control device (340) is configured to vary the radiant power of individual light sources, groups of light sources, or all light sources over time.

52. Lighting device for cosmetic applications according to any one of claims 34 to 51, wherein the light sources (210a, 210b, 210c, 220a, 220b, 220c, 310, 320, 330, 920) are LEDs.

53. Lighting device for cosmetic applications according to any one of claims 34 to 52, wherein the support device has a downwardly extending extension (915, 1160, 1260) with light sources (920, 1230) to also surround the back of the head and neck of the human head.

54. Lighting device for cosmetic applications according to claim 53, wherein the extension (1160, 1260) is detachably attached to the head element (1114, 1214), in particular by means of a magnetic holder (1161).

55. Lighting device for cosmetic applications according to claim 53 or 54, wherein electrical contacts (1163) for supplying electrical energy to the light sources (1230) of the extension (1160) are arranged at the interface between the head element (1114, 1214) and the extension (1160, 1260). 2025-INV-0047 -71- 56. Lighting device for cosmetic applications according to one of claims 34 to 55, wherein the outer contour of the interior of the support device is approximately semi-spherical and has a mean diameter of approximately 42 to 50 cm.

57. Lighting device for cosmetic applications according to one of claims 34 to 56, further comprising a fan device (1240) arranged on the support device (1110, 1210) to move air through the interior (1111 , 1211).

58. Lighting device for cosmetic applications according to claim 57, wherein the fan device (1240) further comprises a heating device for heating the air moved by the fan device (1240).

59. Lighting device for cosmetic applications according to one of claims 57 or 58, wherein the control device also controls the heater, the fan device and the heating device.

60. Lighting device for cosmetic applications according to any one of claims 34 to 59, wherein the two wing elements (113a, 113b, 1113, 1213) are located on opposite sides of the head when the lighting device (100, 1110) is used as intended, and wherein the head element (14a, 114b, 1114, 1214) surrounds the upper part of the head when the lighting device (100) is used as intended.

61. Lighting device for cosmetic applications according to any one of claims 34 to 60, wherein the lighting device is a multi-purpose device for the simultaneous or successive performance of at least two different cosmetic, non-therapeutic treatments of the head and / or head hair of a person.

62. Lighting device for cosmetic applications according to one of the preceding claims, wherein the inside of the support device, in particular the inside of the head element and wing elements, has an inner coating, in particular made of a silicone material.

63. Use of a lighting device for cosmetic applications according to one of the preceding claims for carrying out a cosmetic, non-therapeutic 2025-INV-0047 -72- Treatment of the head and / or head hair of a person, especially for cosmetic, non-therapeutic treatment of head hair.

64. Use according to claim 63, wherein the cosmetic, non-therapeutic treatment is bleaching of the scalp hair.

65. Use according to claim 63 or 64, wherein the use is for the optical excitation of a photosensitizer contained in a bleaching agent in the bleaching of hair in order to stimulate the photosensitizer to form singlet oxygen, wherein the bleaching agent comprises: (A) at least a first photosensitizer capable of generating singlet oxygen upon light excitation, (B) at least one persulfate salt, (C) at least one alkalizing agent, and (E) at least one hydrogen peroxide source.

66. Use according to claim 65, wherein the first photosensitizer is selected from the group comprising phenalenones, turmeric, flavins, riboflavins, phenoxazines, phenothiazines, phthalocyanines, naphthalocyanines, xanthenes, chlorophyll A, chlorophyll B, porphyrins, coumarins, pyrenes, perylenes, acridine orange and tetrapyrroles, wherein the photosensitizer particularly comprises a phenalenone.

67. Use according to claim 65 or 66, wherein the hair is placed on translucent films during optical excitation.

68. Use according to any one of claims 63 to 67, wherein the cosmetic, non-therapeutic treatment is a treatment of the head hair with a cold mist generated by the mist device (1290).

69. Use according to any one of claims 63 to 68, wherein the cosmetic, non-therapeutic treatment is a treatment of the scalp hair, a treatment with visible light to strengthen the hair roots.

70. Use according to any one of claims 63 to 69, wherein in cosmetic, non-therapeutic treatment the control device controls the light sources which 2025-INV-0047 -73- Fog device that controls the fan device in such a way that at least two selected from light sources, fog device, and fan device are active simultaneously or sequentially.

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