Lighting device

Abstract

A lighting device comprising environmentally friendly material. The lighting device comprises a support, that supports a light emitting element and a reflector, which can fit within a tube of a housing. The support and the tube are formed from different cellulose fiber materials. When the support is inserted into the tube, the housing at least partially houses the light emitting element and the reflector.

Description

[0001] LIGHTING DEVICE

[0002] FIELD OF THE INVENTION

[0003] The present invention relates to the field of lighting devices, and in particular to lighting devices comprising recyclable material.

[0004] BACKGROUND OF THE INVENTION

[0005] There is an increasing reliance on artificial lighting in everyday life. Traditionally, lighting devices or luminaires for providing artificial light are formed of metallic or plastic components. In particular, it is extremely common for housings and structural supports for lighting devices to be formed of metallic or plastic components. Disadvantageously, components made of such materials add significant weight to the lighting and are difficult to assemble (e.g., requiring screws and / or adhesive).

[0006] One proposed approach to reduce the environmental impact of a lighting device is to replace metallic or plastic housings / supports with housings / supports made from paper- derived material, such as cardboard or paperboard.

[0007] There is an ongoing desire to improve the performance, stability and longevity of lighting devices, particularly those comprising components formed from environmentally friendly material such as paper-derived material.

[0008] US9488320B1 discloses lighting systems include a set of components that fit entirely within a shipping container.

[0009] US20160327241 Al discloses luminaire assemblies that include a dimensionally stable housing and a hollow waveguiding core.

[0010] WO2017029147A1 discloses a luminaire comprising a luminaire housing delimited by a light exit structure engaging with an edge of a pliable container.

[0011] WO 2023021316A1 discloses a light fixture for fixed mounting or also as a suspended light fixture.

[0012] SUMMARY OF THE INVENTION

[0013] The invention is defined by the claims. According to examples in accordance with an aspect of the invention, there is provided a lighting device comprising: a housing comprising a tube of first cellulose fiber material; a support of second cellulose fiber material different from the first cellulose fiber material; a light emitting element supported by the support, the light emitting element being configured to emit light; and a reflector, for the light emitting element, supported by the support, wherein, the support fits into the tube of first cellulose fiber material such that, when the lighting device is assembled, the light emitting element and reflector are at least partially housed by the housing.

[0014] The present disclosure provides a lighting device in which the housing and support for lighting elements are formed from biodegradable and recyclable materials. More particularly, the support can be inserted into a tube (of cellulose fibre material) for ease of assembly (of the lighting device) and increased ease and reduced material cost for manufacturing at least the support.

[0015] The proposed approach also avoids the need for dedicated securing mechanisms between the support and the housing. In particular by fitting the support into the housing, the support will press against the housing so as to be secured thereagainst.

[0016] In the context of the present disclosure, cellulose fiber material is any material formed from cellulose fibers (i.e., plant-derived fibers). It is well known how cellulose fibers can be obtained from bark, wood, stems, leaves or any other part of a plant.

[0017] The support may be a foldable support configured to fit into the tube of first cellulose fiber material when folded. Configuring the support to be a foldable support advantages increases an ease of manufacturing the support, as well as reducing a space or volume occupied by the support, e.g., for increased ease of delivery and pre-installation movement. In particular, by configuring the support to be a foldable support, it can be manufacturing using pre-existing techniques that do not require a rigid preparation of pulp material.

[0018] The foldable support may be foldable between: an unfolded state, in which the foldable support is unable to fit in the tube of first cellulose fiber material; and a folded state, in which the foldable support is able to fit in the tube of first cellulose fiber material.

[0019] In some examples, the foldable support is configured such that: when the foldable support is in the unfolded state, the light emitting element and / or reflector are not secured to the foldable support; and / or when the foldable support is in the folded state, the light emitting element and / or reflector are secured to the foldable support. In some examples, the reflector is a preformed reflector. Alternatively, the reflector is attached to the inner wall(s) of the support with e.g., a piece of double side press sensitive adhesive (PSA).

[0020] In some examples, the reflector is at least partially deformed during assembly of the lighting device. For instance, side portions of the reflector may be deformed when supported by the support.

[0021] In some examples, the reflector comprises a foldable reflector, which is configured to move between a reflector folded configuration and a reflector folded configuration. This can effectively allow the reflector to be bent or otherwise folded into position during assembly of the lighting device.

[0022] The first cellulose material may be formed from cardboard and / or a winding of paper; and / or the second cellulose material may be compression molded paper pulp. The paper pulp may, for instance, be formed from bagasse and / or recycled paper. Other forms of paper pulp will be apparent to the appropriately skilled person.

[0023] The tube of first cellulose fiber material may comprise a light exit window positioned to, when the lighting device is assembled, allow the exit of light emitted by the light emitting element out of the housing.

[0024] The lighting device may further comprise a diffusive sheet positioned between an inner wall of the tube and the support, the diffusive sheet having a thickness of at least 0.5 mm. In some examples, the diffusive sheet has a thickness of no more than 2 mm, e.g., no more than 1.2 mm.

[0025] In some examples, the support is configured such that when the support is fitted into the tube of first cellulose fiber material, a frictional force between the support and tube restricts a movement of the support with respect to the tube.

[0026] The lighting device may further comprise at least one end cap, each end cap being configured to cap a respective end of the tube of first cellulose fiber material when the lighting device is assembled.

[0027] Each end cap may be formed as part of the support. In particular, each end cap may be foldably connected to a remainder of the support.

[0028] The lighting device may comprise one or more suspension elements, for suspending the lighting device, supported by the support.

[0029] The support may comprise: a base for supporting the light emitting device; and first sidewall and second sidewall, each sidewall being foldably connected to the base and configured to, when folded with respect to the base, secure the reflector between the first and second sidewalls and the base.

[0030] In some examples, when the first and second sidewalls are unfolded with respect to the base, the foldable support is unable to fit inside the tube of first cellulose fiber material.

[0031] The support is a mold-formed support. This approach increases an ease and reduces complexity of manufacturing the support, providing an easier to manufacture lighting device.

[0032] There is also proposed a method of assembling a lighting device, the method comprising: obtaining a housing comprising a tube of first cellulose fibre material; obtaining a foldable support of second cellulose fibre material; positioning a light emitting device and a reflector on the foldable support; folding the foldable support to secure the light emitting device and the reflector to the support; and inserting the foldable support into the tube of first cellulose fibre material.

[0033] These and other aspects of the invention will be apparent from and elucidated with reference to the embodiment s) described hereinafter.

[0034] BRIEF DESCRIPTION OF THE DRAWINGS

[0035] For a better understanding of the invention, and to show more clearly how it may be carried into effect, reference will now be made, by way of example only, to the accompanying drawings, in which:

[0036] Figure 1 provides an exploded view of a proposed lighting device;

[0037] Figure 2 illustrates a support for use with the proposed lighting device;

[0038] Figure 3 provides another view of the support;

[0039] Figures 4 and 5 illustrate a support supporting a reflector;

[0040] Figures 6, 7, 8 and 9 illustrate a support supporting a reflector and a light emitting element;

[0041] Figures 10 and 11 illustrate an assembled lighting device.

[0042] DETAILED DESCRIPTION OF THE EMBODIMENTS

[0043] The invention will be described with reference to the Figures.

[0044] It should be understood that the detailed description and specific examples, while indicating exemplary embodiments of the apparatus, systems and methods, are intended for purposes of illustration only and are not intended to limit the scope of the invention. These and other features, aspects, and advantages of the apparatus, systems and methods of the present invention will become better understood from the following description, appended claims, and accompanying drawings. It should be understood that the Figures are merely schematic and are not drawn to scale. It should also be understood that the same reference numerals are used throughout the Figures to indicate the same or similar parts.

[0045] The invention provides a lighting device comprising environmentally friendly material. The lighting device comprises a support, that supports a light emitting element and a reflector, which can fit within a tube of a housing. The support and the tube are formed from different cellulose fiber materials. When the support is inserted into the tube, the housing at least partially houses the light emitting element and the reflector.

[0046] Figure 1 provides an exploded view of a proposed lighting device 100, for improved contextual understanding. The lighting device 100 comprises a housing 110 comprising a tube 111 of first cellulose fiber material. The lighting device also comprises a support 120, a light emitting element 130 and a reflector 140. Optionally, the lighting device 100 may further comprise a diffusive sheet 150 and / or one or more suspension elements 161, 162.

[0047] The lighting device 100 is preferably, as illustrated, an elongate lighting device. However, this is not essential, and other shapes and / or designs for the lighting device 100 will be apparent to the appropriately skilled person.

[0048] The tube 111 takes the form of a hollow prism or cylinder having at least one (end) opening or aperture 115 to allow access or facilitate to the hollow interior 116 of the tube 111. In the illustrated examples, the tube 111 takes the form of a hollow cuboid, although other suitable prisms are known to the skilled person (e.g., a hollow cube).

[0049] The support 120 is formed of a second cellulose fiber material, which is different to the first cellulose fiber material. In the context of the present disclosure, a cellulose fiber material is any material formed from cellulose fibers (i.e., plant-derived fibers). It is well known how cellulose fibers can be obtained from bark, wood, stems, leaves or any other part of a plant.

[0050] The housing 110 may be intended for providing structural rigidity to the lighting device, with the support 120 being intended for defining the position of the light emitting element 130 and / or the reflector 140 with respect to the housing. To achieve this intent, the tube 111 of the housing 110 may be formed from a harder or more rigid form of cellulose fiber material than the support 120. For instance, the first cellulose material may be formed from cardboard and / or a winding of (e.g., kraft) paper and the second cellulose material may be formed from a compression molded paper pulp. This approach increases ease of manufacturing, as it is easier to form a positiondefining element with less rigid materials. The proposed approach provides an easy to manufacture lighting device, without losing the rigidity of the overall lighting device.

[0051] More particularly, the support may be formed from a molded paper pulp. This means that the support can be formed in a single press molding process, for increased ease of manufacturing with low material cost. The paper pulp may, for instance, be formed from bagasse and / or recycled paper. Other forms of paper pulp will be apparent to the appropriately skilled person.

[0052] The support 120 is configured to support the light emitting element 130 and the reflector 140. In particular, the support 120 is configured to provide structural support to the light emitting element and the reflector, e.g., to couple the two elements together and / or define a position of the two elements with respect to one another.

[0053] The support 120 is also configured to fit inside the tube 111, e.g., to slide through the opening 115 in the tube 111 to fit within the hollow interior 116 of the tube. When the support 120 is fitted inside of the tube, the tube 111 and support 120 are assembled together. More specifically, the support 120, when fitted inside the tube, may create a frictional force that restricts a movement of the support with respect to the tube. More particularly, the support 120 may create a frictional force with an inner surface of the tube, the inner surface bounding or defining the hollow interior 116 of the tube 111. Thus, the outer dimension of the support 120 may match or compliment an inner dimension of the tube 111.

[0054] The light emitting element 130 may comprise one or more light emitting arrangements, e.g., each comprising one or more light emitted diodes. In preferred examples, each light emitting arrangement comprises a strip of light emitting features (e.g., a string of LEDs on a PCB).

[0055] The light emitting element 130 may, for instance, comprise one or more light emitting arrangements mounted or supported by a substrate. The substrate may, for instance, be formed from a cellulose material such as cardboard. However, in other examples, the substrate may be formed from another material such as a PCB, ceramic, silica, alumina or metal. This may be desired for improved fire safety.

[0056] The reflector 140 may be a preformed reflector, e.g., a reflector that is nonfoldable. The reflector may be formed of any suitably reflective material, but is preferably formed from a cellulose material, e.g., a white cardboard or white paper pulp material. In some examples, the reflector 140 may be formed from a piece of paper, or a plastic sheet, loaded with high reflective material, e.g., TiCh, BaSCU, etc. In general, the reflector is configured to redirect light emitted by the light emitting element, e.g., to define or control the beam angle of light output by the lighting device. Suitable example shapes and designed for reflectors, particularly reflectors for elongate lighting devices, are well known in the art.

[0057] The cross-sectional shape of the reflector 140 may be generally tapered, e.g., in a direction towards the light emitting element 130 when the lighting device 100 is assembled.

[0058] The support 120 is preferably a foldable support, such that it can be folded between a folded state and an unfolded state. In preferred examples, the foldable support is unable to fit inside the tube when in the unfolded state. Thus, during assembly of the lighting device, the support 120 should be folded and then inserted or fitted inside the tube.

[0059] In some examples, the support 120 is configured to only secure the light emitting element and / or reflector thereto when in the folded state. Thus, when in the unfolded state, the light emitting element and / or the reflector may be removable from the support 120.

[0060] However, it is not essential that the support be a foldable support. Alternative embodiments for a support may comprise a rigid (i.e., non-foldable support) sized to fit within the tube 111 of the housing 110.

[0061] The tube 111 may comprise or define a light exit window 112. The light exit window 112 may, for instance, be formed from an aperture or throughhole on a side wall of the tube 111. The light exit window is configured to, when the lighting device is assembled, allow the exit of light emitted by the light emitting element through, e.g., to exit the housing and therefore the lighting device.

[0062] An approach for assembling a proposed lighting device is hereafter described with reference to Figures 2 to 11. These Figures demonstrate different stages for the assembly of a proposed lighting device. Where relevant, additional optional features and characteristics of elements of the lighting device will be described, to improve their contextual understanding.

[0063] For the purposes of the lighting device explained with reference to Figures 2 to 11, the support 120 is a foldable support.

[0064] Initially, as illustrated by Figures 2 and 3, there is a foldable support 120 for fitting within a tube (not visible in Figure 2). The foldable support 120 is initially in an unfolded state, e.g., and may be unable to fit within the tube, e.g., be too wide to fit through the (end) aperture of the tube.

[0065] The foldable support 120 comprises a base 121, a first side wall 122 and a second side wall 123. To move the foldable support from an unfolded state to a folded state, the first 122 and second 123 side walls are folded towards the base 121. As illustrated in Figures 4 and 5, a reflector 140 (and preferably a light emitting element) is / are positioned on the support 120, specifically upon the base 121 of the support 120. As illustrated in Figures 6 and 7, the first and second sidewalls are then folded towards the base 121 of the support to thereby secure the reflector 140, and preferably the light emitting element 130, to the support 120.

[0066] As perhaps best illustrated by Figure 7, the first and second sidewalls may each comprise at least one first retaining element or surface configured to retain or restrict a movement of the reflector 140 with respect to the base 121 and at least one second retaining element configured to retain or restrict a movement of the light emitting element 130 with respect to the base 121.

[0067] In the illustrated example, the light emitting element 130 and reflector 140 are configured such that the light emitting element is configured to fit within a slot 141 defined by the reflector 140. When folded with respect to the base, the first and second sidewalls of the support 120 will contact the reflector 140 (e.g., at securing locations 711, 712, 721, 722). This contact may effectively act to clamp the reflector 140 to the base 121, and thereby clamp the light emitting element 130 to the base. In this way, the support 120 may be able to selectively secure the reflector 140 and / or the light emitting element 130.

[0068] In some examples, the support 120 is configured to engage with one or more exposed ends of the reflector 140 to thereby secure the reflector to the support. More particularly, the side wall(s) of the support 120 may clamp the light emitting element to the base when the support 120 is in the folded state.

[0069] In some examples, the reflector 140 may comprise a base portion 142 that defines a slot 141 for receiving the light emitting element 130. The slot may, for instance, engage with a side of the light emitting element 130. The reflector 140 may also comprise a tapering portion 143 that widens with increased distance from the base portion 142, e.g., tapers towards the base portion, to act as a reflective portion for the light emitting element. The initially width of the tapering portion 143 may be less than the width of the base portion at an end closest to the base portion.

[0070] The support 120 may be configured such that, when in a folded state (as illustrated by Figure 7), the support defines a retaining region that restricts a movement of the reflector, e.g., away from the base 121 of the support. In particular, the support 120 may define one or more retaining surfaces 721, 722 configured to restrict a movement of the base portion 142 of the reflector 140 away from the base 121 of the support 120, when the support 120 is in the folded state. Each side wall may be shaped so as to provide structural support to the reflector 140, particularly the tapering portion 143 of the reflector, as well as to contact an inner surface of the tube. In particular, each side wall may comprise one or more reflector support sections 122A, 122B and one or more tube contact sections 122C. The reflector support section(s) may be configured to structurally support the tapering portion of the reflector. The advantage of the curved sidewall 122 and 123 is that, such curvature brings additional mechanical strength to keep the side walls rigid.

[0071] In some examples, although not illustrated, the reflector may be configured such that when the support moves from the unfolded state to the folded state one or more portions of the reflector deform or move as the support engages or contacts the reflector. In particular, the sidewall(s) of the support may deform one or more reflector sidewalls of the reflector. In some examples, the deformation of the reflector side walls creates the tapering shape of the tapering portion 143 of the reflector (e.g., the tapering portion may, before contacting the support, be non-tapered).

[0072] By way of example, the support 120 may comprise one or more contacting surface 711, 712 that contact the reflector and deform the reflector so as to define the shape of the tapering portion 140 of the reflector.

[0073] However, in other approaches, the contacting surface(s) 711, 712 may instead simply engage with and / or contact a fixed shape of the reflector, e.g., the reflector may be preformed.

[0074] The support is designed to have an open side 750 out of which light emitted by the light emitting element 130 is output. The open side 750 of the support may, when the support supports the light emitting element and the reflector, be opposite the base portion 142 of the reflector 140.

[0075] Optionally, the lighting device comprises at least one end cap 124, 125. Each end cap is configured to cap a respective end of the tube 111 of first cellulose fiber material when the lighting device is assembled.

[0076] In the illustrated example, the support 120 itself comprises the end caps(s). In particular, the end cap(s) 124, 125 are foldable connected to the remainder of the support, e.g., to the base 121 of the support.

[0077] As illustrated in Figures 8 and 9, the end caps are folded upwards towards the base 121. This configures the support 120 to enter the folded state for insertion into the tube 111. The end cap(s) may act to reduce or prevent an ingress of material into the tube once the support 120 has been inserted into the tube, and / or reduce or prevent light from escaping through the (end) aperture(s) 115 of the tube 111.

[0078] The end cap(s) 124, 125 may also act to provide additional structural support to the support 120. In particular, the end cap(s) may, when folded upwards towards the base, prevent or restrict an unfolding of the side walls 122, 123 of the foldable support 120. More particularly, the end cap(s) may engage with an end of the support, when in the folded state, so as to define a position of the side walls 122, 123 with respect to the base. Thus, the end cap(s) 124, 125 may, in addition to covering an end of the support 120, also provide structural support to the support 120.

[0079] After the support has been folded into the folded state, it is inserted into the tube

[0080] 111 through the (end) aperture 115 of the tube 111. More particularly, the support is positioned and / or arranged such that an open side 750 of the light support is aligned with a light exit window 112 of the tube 111. This ensures that light emitted by the light emitting element is emitted through the open side 750 of the support 120 and out through the light exit window

[0081] 112 of the tube 111.

[0082] By inserting the support 120 into the tube 111, the light emitting element 130 and the reflector 140 are housed within the tube 111.

[0083] Figures 10 and 11 illustrate the assembled lighting device, after the support 120 has been inserted into the tube 111.

[0084] The optional end cap(s) act to block the (end) apertures of the tube 111, e.g., to reduce visibility of components housed within the tube, reduce light emission through the (end) aperture(s) 115 of the tube and / or reduce a likelihood of ingress of material into the interior of the tube. The end cap(s) also act to increase a contact area between the support 120 and the tube 111, to thereby increase the frictional force between the support 120 and the tube 111.

[0085] As previously mentioned, the lighting device 100 may optionally comprise a diffusive sheet 150. If present, the diffusive sheet is configured to cover the light exit window 112. In particular, the diffusive sheet 150 is positioned between the light exit window 112 of the tube 111 and the support 120.

[0086] By way of example, with reference to Figure 7, the diffusive sheet 150 may be positioned or supported on a diffusive sheet surface 760 of the support 120. In this way, when the support is inserted or fitted into the tube 111, the diffusive sheet 150 may be held between the support 120 and the tube 111. The diffusive sheet 150 is configured to scatter and / or diffuse light transmitted therethrough. This increases the uniformity of the light emitted by the lighting device 100 and / or reduces glare. Examples of diffusive sheets are well known in the art.

[0087] Preferably, the diffusive sheet is also formed from a cellulose fiber material, such as paper or rice paper. This further improves the recyclability of the lighting device. In preferred examples, the thickness of the diffusive sheet is at least 0.5 mm, to facilitate transmission and diffusion of light. In some examples, the thickness of the diffusive sheet is no greater than 2 mm, e.g., no greater than 1 mm, e.g., between 0.5 mm and 1.2 mm.

[0088] It is recognized that a tube 110 of cellulose fiber material is cut open, e.g., to create the light exit window 112 on its side wall, it is common for the tube to deform due to internal stress which is released after the opening. The most significant deformation will occur towards the middle of the light exit window, causing contraction or constriction (i.e., a reduction in size) of the light exit window 112. Provision of the support 120 into the tube 110, will at least partially reverse the contraction or constriction of the light exit window (i.e., dilate the light exit window). Provision of a diffusive sheet 150 with sufficient thickness can further aid with the reversal of the contraction or constriction of the light exit window, i.e., with the dilating.

[0089] Thus, the use of a diffusive sheet with sufficient thickness enhances the structural support to the housing.

[0090] As previously mentioned, one or more suspension elements 161, 162 are provided on top of the lighting device 100. The suspension element may be configured to facilitate hanging or suspension of the lighting device 100, e.g., from a ceiling or other surface. As perhaps best illustrated by Figure 1, each suspension element may comprise a first suspension portion 161 positioned on one side of the tube 111 (e.g., an inner side), and a second suspension portion 162 positioned on another side of the tube 111 (e.g., an outer side). The two suspension portions may effectively clamp the tube in order to secure the suspension element to the remainder of the lighting device.

[0091] In preferred examples, the suspension element may be at least partially supported by the support 120. In particular, the lighting device may be configured such that, after assembly, the (e.g., base 121 of the) support 120 is positioned between the first suspension portion 161 and the second suspension portion 162 of each suspension element.

[0092] In particular, each second suspension portion 161 may be supported by the support 120. This is perhaps best illustrated by Fig 2, which demonstrates example locations for the second suspension portion(s) 162. One or more cables for power supply and / or lighting control may also go through the suspension element(s).

[0093] More specifically, the support 120 (and preferably the base 121 of the support) may comprise one or more suspension apertures through which a first suspension element may reach. The tube 111 may comprise corresponding apertures to facilitate the extension of the first suspension element through the one or more suspension apertures of the support 120.

[0094] Although not explicitly illustrated for the sake of clarity, the lighting device may comprise additional components, e.g., driving circuitry, one or more mounts, sensing circuitry, monitoring circuitry, control circuitry and so on.

[0095] Variations to the disclosed embodiments can be understood and effected by those skilled in the art in practicing the claimed invention, from a study of the drawings, the disclosure and the appended claims. In the claims, the word "comprising" does not exclude other elements or steps, and the indefinite article "a" or "an" does not exclude a plurality.

[0096] The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage.

[0097] If the term "adapted to" is used in the claims or description, it is noted the term "adapted to" is intended to be equivalent to the term "configured to". If the term "arrangement" is used in the claims or description, it is noted the term "arrangement" is intended to be equivalent to the term "system", and vice versa.

[0098] Any reference signs in the claims should not be construed as limiting the scope.

Claims

CLAIMS:

1. A lighting device (100) comprising: a housing (110) comprising a tube (111) of first cellulose fiber material; a support (120) of second cellulose fiber material different from the first cellulose fiber material; a light emitting element (130) supported by the support, the light emitting element being configured to emit light; and a reflector (140), for the light emitting element, supported by the support, wherein, the support fits into the tube of first cellulose fiber material such that, when the lighting device is assembled, the light emitting element and reflector are at least partially housed by the housing; wherein the support is a foldable support configured to fit into the tube of first cellulose fiber material when folded; wherein the foldable support is foldable between: an unfolded state, in which the foldable support is unable to fit in the tube of first cellulose fiber material; and a folded state, in which the foldable support is able to fit in the tube of first cellulose fiber material; wherein the foldable support is configured such that: when the foldable support is in the folded state, the light emitting element and / or reflector are secured to the foldable support.

2. The lighting device (100) of claim 1, wherein the reflector (140) is a preformed reflector.

3. The lighting device (100) of claim 1 or 2, wherein: the first cellulose material is formed from cardboard and / or a winding of paper; and / or the second cellulose material is compression molded paper pulp.

4. The lighting device (100) of any of claims 1 to 3, wherein the tube (111) of first cellulose fiber material comprises a light exit window (112) positioned to, when the lighting device (100) is assembled, allow the exit of light emitted by the light emitting element out of the housing (110).

5. The lighting device (100) of claim 4, further comprising a diffusive sheet (150) positioned between an inner wall of the tube (111) and the support (120), the diffusive sheet having a thickness of at least 0.5 mm.

6. The lighting device (100) of claim 1, wherein the foldable support is configured such that: when the foldable support is in the unfolded state, the light emitting element and / or reflector are not secured to the foldable support.

7. The lighting device (100) of any of claims 1 to 6, wherein, when the support is fitted into the tube of first cellulose fiber material, a frictional force between the support and tube restricts a movement of the support with respect to the tube.

8. The lighting device (100) of any of claims 1 to 7, further comprising at least one end cap (124, 125), each end cap being configured to cap a respective end of the tube (111) of first cellulose fiber material when the lighting device is assembled.

9. The lighting device (100) of claim 8, wherein each end cap (124, 125) is formed as part of the support.

10. The lighting device (100) of any of claims 1 to 9, further comprising one or more suspension elements (161, 162), for suspending the lighting device, supported by the support.

11. The lighting device (100) of any of claims 1 to 10, wherein the support comprises: a base (121) for supporting the light emitting device (130); anda first sidewall (122) and second sidewall (123), each sidewall being foldably connected to the base and configured to, when folded with respect to the base, secure the reflector between the first and second sidewalls and the base.

12. The lighting device (100) of claim 11, wherein, when the first and second sidewalls are unfolded with respect to the base, the foldable support is unable to fit inside the tube of first cellulose fiber material.

13. The lighting device (100) of any of claims 1 to 12, wherein the support is a mold-formed support.

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