Light

Abstract

The present application relates to a luminaire (1) comprising a housing (2) which is elongated along a longitudinal axis (3) of the housing (2) and a plurality of LEDs (4), wherein the housing (2) has a light chamber (5) extending long parallel to the longitudinal axis (3), wherein the light chamber (5) has a light chamber floor (6) and, opposite the light chamber floor (6), a light chamber opening (7) on a long side of the housing (2), wherein the LEDs (4) are arranged on the light chamber floor (6) in a manner distributed in the longitudinal direction of the light chamber (5) and are aligned such that they emit light in the direction of the light chamber opening (7), wherein a height-to-width ratio of the light chamber (5), which relates a height (9) of the light chamber (5) to a width (10) of the light chamber (5), is at least 0.7:1.The luminaire comprises a number of parabolic reflectors (13) corresponding to the number of LEDs (4), wherein the reflectors (13) each have a base surface (15) provided with an opening (14) and are completely open at their end (16) opposite the base surface (15), wherein a reflector (13) is assigned to an LED (4) and is aligned such that the respective LED (4) is arranged in or on the opening (14) of the base surface (15) of the associated reflector (13), so that light from the LED (4) is emitted parallel to a vertical axis (17) of the reflector (13) in the direction of the open end (16) of the reflector (13).

Description

[0001] The present application relates to a luminaire according to claim 1. Such luminaires are used in particular for illumination inside buildings, for example sports halls or industrial halls, and / or for illumination outside buildings, for example sports fields, outdoor industrial facilities, or port facilities. Depending on the application, it may be particularly useful to use a plurality of luminaires to illuminate a particular hall or (sports) field, which luminaires are arranged, for example, distributed throughout the hall or along an edge of the field. The luminaires can, for example, be mounted directly or indirectly (via one or more crossbeams) on masts and thus arranged at a certain height above the ground. Mounting on a truss of a hall ceiling or a building wall is also conceivable. State of the art

[0002] Such luminaires are already known in the state of the art. In particular, luminaires equipped with a large number of LEDs are known, thus promising high luminosity with low power consumption. When illuminating public spaces, especially sports fields, it has proven problematic that unacceptable light pollution can occur in the area surrounding the illuminated space. Light pollution of the sky can also occur if luminaires radiate very strongly upwards. In Germany, the Federal / State Working Group for Immission Control (LAI) has issued guidelines for assessing the effects of light emissions on humans. In principle, light emissions in public spaces in Germany are subject to the provisions of the Federal Immission Control Act (BImSchG).

[0003] Tenders for lighting systems intended for use in public spaces regularly require compliance with limit values ​​based on the guidelines of the LAI. This applies both to the light emissions to which neighboring areas of the areas to be illuminated are exposed ("room brightening") and, in particular, to "glare," which is usually directly caused by the luminaire's light sources and can result in both psychological and physiological impairments to people.

[0004] The specification of limit values ​​is intended to help minimize the impact on people and the environment caused by the installation and operation of lighting systems. Despite these specifications, which are regularly found in tenders, in a large number of cases, luminaires are installed that are not technically suitable for meeting these specifications.

[0005] In cases where such problems do not exist, particularly when a luminaire is used in an enclosed space or building such as a hall, it is important to design the luminaire as cost-effectively as possible while still achieving directed radiation in order to adequately illuminate the areas of the enclosed space that are to be illuminated with the emitted light. In industrial halls, for example, this can be particularly important for increasing occupational safety. Adequate illumination of equipment, the surrounding area, and the respective work machines is essential for this. Task

[0006] The object of the present invention is therefore to provide a luminaire that enables the most precise light emission possible while being cost-effective to manufacture. For outdoor use, the luminaire also has the task of preventing unwanted room brightening outside of the desired illuminated area and also preventing unwanted glare. Solution

[0007] The underlying object is achieved according to the invention with a luminaire having the features of claim 1. Advantageous embodiments emerge from the associated subclaims and the description.

[0008] The luminaire comprises a housing that is elongated along a longitudinal axis of the housing. The housing can preferably be cuboid-shaped. In this case, a length of the housing measured parallel to the longitudinal axis of the housing is preferably greater than both a height of the housing and a width of the housing. Further preferably, the height of the housing is greater than the width of the housing.

[0009] The luminaire further comprises a plurality of LEDs, for example, three, four, or five LEDs. The LEDs are preferably arranged in series parallel to the longitudinal direction of the housing, one behind the other, and preferably equidistantly distributed along a light chamber floor described below. The LEDs can, for example, each have a power in the range between 20 W and 100 W.

[0010] The housing has a light chamber that extends parallel to the longitudinal axis of the housing. Preferably, the housing has exactly one light chamber, the volume of which makes up significantly more than 50%, preferably more than 60%, of the total volume of the housing. It is preferred if the light chamber is elongated, wherein a length of the light chamber measured parallel to the longitudinal axis of the housing exceeds both a height of the light chamber and a width of the light chamber. The light chamber has a lower light chamber floor and, opposite the light chamber floor on a long side of the housing, an upper light chamber opening. The light chamber opening extends in the manner of a window opening at least substantially over the entire length of the light chamber. Preferably, the light chamber opening extends over at least 80%, preferably at least 90%, of the entire length of the light chamber.Furthermore, the light chamber opening preferably extends over the entire length of the light chamber. The LEDs are arranged on the light chamber floor, distributed longitudinally along the light chamber, and aligned such that they emit light in the direction of the light chamber opening. This ensures that, when the luminaire is in operation, the LEDs emit light that radiates from the light chamber floor toward the light chamber opening and exits the light chamber and the luminaire housing at the light chamber opening. In this way, the luminaire is suitable for emitting light into the surroundings.

[0011] Preferably, the illuminated space extends almost the entire length of the housing, viewed in the longitudinal direction of the housing. Accordingly, it is advantageous if the length of the illuminated space is at least 70%, preferably at least 80%, of the length of the housing. Independently of this, but preferably in combination, it is further advantageous if the width of the illuminated space extends almost the entire width of the housing. Accordingly, it is advantageous if the width of the illuminated space corresponds to at least 70%, preferably at least 80%, of the width of the housing.

[0012] In a particularly preferred embodiment, the illuminated space is designed such that, viewed in a cross-section perpendicular to the longitudinal axis of the housing, it widens, preferably continuously, starting from the illuminated space floor in the direction of the illuminated space opening. This widening can be caused, for example, by obliquely oriented lateral illuminated space walls of the illuminated space, which, viewed in the cross-section perpendicular to the longitudinal axis of the housing, widen conically in the direction of the illuminated space opening. Viewed in the said cross-section, the illuminated space in such a configuration can also be described as funnel-shaped. In this case, it is advantageous if the illuminated space floor has a certain (residual) width when viewed in the width direction of the housing, so that the LEDs can be mounted and arranged on or in the illuminated space floor.Accordingly, with a funnel-shaped design of the illuminated chamber, it is advantageous if the shaped funnel is "blunt," meaning that the illuminated chamber walls do not taper to a point at the illuminated chamber floor, but rather have a base area similar to a cross-section formed by a truncated cone, forming the illuminated chamber floor. In this design, the illuminated chamber has the shape of a trapezoid in the cross-section perpendicular to the longitudinal axis of the housing.

[0013] It is also conceivable for the light chamber walls to be curved or bent rather than flat, for example, with a parabolic or circular arc geometry. Here, too, it is advantageous if the light chamber floor has a certain width, viewed in the width direction of the housing, in order to be able to arrange the LEDs on the light chamber floor.

[0014] The luminaire is further designed such that the height-to-width ratio of the illuminated space is in the range of at least 0.7:1, preferably between 0.7:1 and 1.2:1, more preferably between 0.8:1 and 1:1. The height of the illuminated space is measured perpendicular to an opening plane of the illuminated space opening, in which the illuminated space opening extends, between the illuminated space floor and the illuminated space opening. The width of the illuminated space is measured in the opening plane of the illuminated space opening perpendicular to the length of the illuminated space. Thus, the width of the illuminated space—provided it extends from the illuminated space floor toward the illuminated space opening as described above—describes a "maximum width" of the illuminated space, since it is measured in the opening plane of the illuminated space opening in which the illuminated space is maximally expanded in the width direction.

[0015] The luminaire has many advantages. In particular, the luminaire is suitable for various uses, which in themselves also have inventive value. In the first use, the luminaire is used for illumination in a building, in particular a hall, for example an industrial hall. In this use, compliance with limit values ​​​​specified by the Federal Immission Control Act is less important, since the light emitted by the luminaire is stopped by the room-defining elements (walls, roof) of the respective building. Consequently, unwanted brightening of the surroundings typically does not occur. Likewise, the problem of glare does not exist to the same extent as in an alternative use, in which the luminaire is used outdoors (outside a building), for example to illuminate a (sports) field.

[0016] For the first use (use in a building), the luminaire, in a configuration not according to the invention, can achieve directed radiation of the emitted light without separate light-guiding elements such as lenses or reflectors. This is particularly due to the shape of the illuminated space, whose height is at least equal to its width (in the case of a match, the ratio is 1:1). The LEDs are therefore located relatively "deep" in the luminaire or illuminated space, so that the illuminated space as such has a directing effect on the emitted light. In this context, the extension of the illuminated space from its illuminated space floor to its illuminated space opening, described above as preferred, is particularly advantageous for using the housing as such as a light-directing element.Since the luminaire does not require any separate light-guiding or light-directing elements to achieve this effect, it is also particularly cost-effective to manufacture. In particular, the simplest design requires only the housing and the LEDs arranged within it.

[0017] The housing is preferably formed in one piece. For example, the housing can be manufactured using a die-casting process, allowing for serial production. In this case, it may be particularly advantageous to use an alloy with particularly high thermal conductivity to dissipate the waste heat from the LEDs and release it into the environment. An aluminum-silicon alloy may be particularly suitable.

[0018] Preferably, the housing is surface-symmetrical with respect to a transverse plane oriented perpendicular to the longitudinal axis of the housing. Additionally or alternatively, in an advantageous embodiment, the housing is surface-symmetrical with respect to a longitudinal plane containing the longitudinal axis and extending in the vertical direction of the housing. Preferably, the housing is doubly surface-symmetrical with respect to both the described transverse plane and the described longitudinal plane. A corresponding embodiment can also be seen in the exemplary embodiment below.

[0019] In order to improve heat dissipation, it can also be particularly advantageous if the housing has a large number of cooling fins on its outside in order to improve convective heat transfer to the environment.

[0020] In a preferred embodiment, the length-to-width ratio of the illuminated space, which is the ratio of the length of the illuminated space to the width of the illuminated space, is at least 2:1, preferably 2.5:1, more preferably 3:1. In other words, in a preferred embodiment, the illuminated space is significantly longer than it is wide. This primarily enables the arrangement of a large number of LEDs in a longitudinal direction, one behind the other, on the floor of the illuminated space. With such a design of the illuminated space, the luminous intensity of the luminaire can be scaled particularly easily, with different numbers of LEDs being able to be arranged on the floor of the illuminated space at the discretion of the luminaire user.

[0021] Accordingly, the luminaire can be particularly advantageous if a plurality of mounting options for the installation of LEDs is provided on the floor of the illuminated space. These mounting options can, for example, take the form of blind holes equipped with an internal thread. In this way, it is possible to arrange LEDs in different numbers and at different locations on the floor of the illuminated space and to connect each of them to the floor of the illuminated space by means of at least one connecting means, for example by means of one or more screws. The mounting options can be designed in such a way that they allow the installation of LEDs at different locations on the floor of the illuminated space. Accordingly, it can be advantageous to have the mounting options arranged one behind the other on the floor of the illuminated space in the longitudinal direction of the illuminated space.

[0022] Particularly for the first use of the luminaire, in which the luminaire is used to illuminate an enclosed space in a building, but also fundamentally independent of this use, it can be particularly advantageous if at least some of the illuminated space walls, preferably all of the illuminated space walls, are coated with a light-reflecting coating. In particular, if the housing is made of an alloy, it can be particularly advantageous if the illuminated space walls are powder-coated white. The aforementioned design of the illuminated space walls has the advantage that the light emitted by the LEDs is reflected by the illuminated space walls, so that the illuminated space walls as such acquire a light-guiding or light-directing function. This improves the radiation characteristics of the luminaire, so that separate light-guiding elements orLight-guiding elements such as reflectors or lenses are easily possible.

[0023] According to the invention, the luminaire further comprises a plurality of reflectors, the number of which corresponds to the number of LEDs, with one reflector being assigned to each of the LEDs. This configuration of the luminaire is particularly preferred for use in outdoor areas to illuminate unbuilt-up areas. In this case, it can be used, for example, to illuminate spaces such as parking lots, sports fields, or other outdoor facilities. In a typical application, the luminaire is arranged at a height of several meters above the ground, for example on a mast or on a wall of a building. The luminaire is preferably arranged at a height of at least 10 m, more preferably at least 15 m, above the ground. Significantly higher installations, for example at a height of 40 m above the ground, are also conceivable.

[0024] The reflectors each have a base provided with an opening and are completely open at the end opposite the base. The reflectors are aligned such that a respectively assigned LED is arranged in or on the opening of the base of the respectively associated reflector, so that light from the LED is emitted parallel to a vertical axis of the reflector in the direction of the open end of the reflector. In other words, a main radiation direction of the respective LED, in which the light is mainly emitted from the LED, is oriented parallel to the vertical axis of the reflector. The reflector is preferably aligned relative to the LED such that a main radiation axis of the LED is congruent with the vertical axis of the reflector. The reflectors are particularly preferably parabolic in shape.Such reflectors are also known in technology as "parabolic reflectors".

[0025] Preferably, the reflectors are placed with their base surface directly on the light room floor, wherein preferably the LED belonging to the respective reflector protrudes from the light room floor through the opening of the base surface into the reflector.

[0026] The design of the luminaire with the described reflectors is particularly advantageous. In particular, the reflectors enable directed radiation of the light emitted by the LEDs, so that a specific space or area can be precisely illuminated. This minimizes the contamination of adjacent areas to the area to be illuminated. The reflectors also help prevent unwanted glare. This is especially true when the reflectors have a certain height measured along their vertical axis. This means that direct visual contact or a direct line of sight between the respective light-emitting LED and the eyes of a person in the vicinity of the illuminated area can be avoided, at least to a large extent.This direct visual contact with the light source is a major contributor to the unpleasant glare experienced by a person. The reflectors thus effectively optically enclose the LEDs, helping to prevent this direct visual contact. The regularly specified limits according to the LAI, in particular the k-value specified there for the mathematical description of glare, can be met in this way.

[0027] The opening in the base of a respective reflector can, for example, be circular. It is also conceivable for the base of the respective reflector to be completely open, so that the base is formed by the opening. In the latter configuration, the base is not present in the form of a physical component, but is completely open or formed by the opening.

[0028] Although an asymmetrical shape is also conceivable, the reflectors are preferably designed to be rotationally symmetrical with respect to their respective vertical axes. Preferably, the inner lateral surfaces of the reflectors are each formed with a plurality of facets, which are provided and configured to direct light emitted by a respective LED in the direction of the respective open end of the respective reflector. In this design, the reflectors are particularly well suited to specifically directing the light in a desired beam direction, thereby enabling precise illumination of a particular space or area. The light pollution emanating from such a luminaire is correspondingly low. The reflectors are preferably parabolic in shape.

[0029] In a particularly preferred embodiment, for at least one of the reflectors, and preferably for all reflectors, the ratio between a diameter of the reflector and a height of the reflector is at most 1.2:1, preferably at most 1:1, and more preferably at most 0.8:1. In particular, said ratio can be in a range between 0.5:1 and 1.2:1, preferably between 0.5:1 and 1:1, and more preferably between 0.5:1 and 0.8:1. The diameter of the reflector is measured perpendicular to the vertical axis of the reflector in an opening plane of the open end of the reflector. The height of the reflector is measured along the vertical axis of the reflector between the base area of ​​the reflector and the open end of the reflector or the opening plane of the open end of the reflector. The smaller the diameter of the reflector relative to its height, the smaller the radiation angle of the reflector.Accordingly, light pollution from the light emitted by the luminaire is reduced. Furthermore, the narrowest possible design of the reflector increasingly avoids a direct line of sight to a person's eyes, thus reducing the incidence of unwanted glare.

[0030] Furthermore, a configuration such as this can be advantageous in which the ratio between the diameter of the reflector and the diameter of the LED assigned to the reflector is at least 2.5:1, preferably at least 3:1, more preferably at least 3.5:1. The diameter of the LED is measured perpendicular to the vertical axis of the reflector. In other words, the diameter of the LED is preferably as small as possible in relation to the diameter of the reflector at its open end. This follows the consideration that the LED is less likely to dazzle a person the "later" a direct line of sight between the LED and the person's eyes occurs. The smaller the LED, the narrower or smaller the angular range in which such a direct line of sight with a person's eyes can occur, starting from the LED.Accordingly, in the manner described, it is advantageous to design the diameter of the LED as small as possible in relation to the diameter of the reflector. For example, the diameter of the LED can be 10 mm. In this case, it would be advantageous if the diameter of the reflector was at least 25 mm, preferably 30 mm, and more preferably 35 mm.

[0031] Furthermore, a configuration such as this can be advantageous in which the ratio between the height of the reflector and the diameter of the LED assigned to the reflector is at least 3:1, preferably at least 4:1, more preferably at least 5:1. In other words, it is advantageous if the reflector is comparatively long or elongated in relation to the diameter of the LED. As a result, the beam angle of the LED is limited by the reflector, so that unwanted illumination of areas away from the area to be illuminated is avoided as far as possible. Undesired contamination of areas adjacent to the area to be illuminated with light is minimized in this way. If the diameter of the LED is 10 mm, for example, it is advantageous if the height of the reflector is at least 30 mm, preferably at least 40 mm, more preferably at least 50 mm.

[0032] In a particularly preferred embodiment of the luminaire, all reflectors are of identical construction, with preferably all reflectors being parabolic in shape and / or made of aluminum. This reduces the number of different parts, thereby simplifying the manufacture of the luminaire. The parabolic shape of the reflectors is particularly well suited to constructively implementing the relationships described above as advantageous between the diameter of the respective reflector, the height of the respective reflector, and the diameter of the LED assigned to the respective reflector. As a result, when using such reflectors, the luminaire is particularly well suited to precisely illuminating an area intended for illumination without unnecessarily polluting adjacent areas with light. Furthermore, unwanted glare for people is largely avoided.This makes the luminaire particularly suitable for use in illuminating outdoor areas, while ensuring compliance with the limits for "room brightening" and "glare" parameters regularly specified in tenders.

[0033] In an advantageous embodiment, the luminaire is designed free of any other light-guiding or light-directing elements apart from the reflectors. It is particularly advantageous if the luminaire is designed free of lenses. This minimizes the unwanted radiation of light into the surroundings, which is particularly problematic when lenses are used. Therefore, luminaires that use lenses as light-guiding or light-directing elements are generally not suitable for maintaining a low level of light pollution in the area intended for illumination.

[0034] Furthermore, a configuration in which the reflectors are each braced against the light chamber floor in a direction parallel to their vertical axes by means of at least one retaining element can be particularly advantageous. Such a retaining element can, for example, be formed by a bearing plate that is placed from above onto the upper end faces of the reflectors and is firmly connected to the housing. In this way, the retaining element is suitable for bracing the reflectors against the light chamber floor, wherein the reflectors are in direct or indirect contact with the light chamber floor at their respective lower ends, i.e. at their base surfaces, and interact with or abut against the retaining element at their upper ends, i.e. with their upper end faces.Movement of the respective reflector in a direction parallel to its vertical axis is thus prevented by the retaining element, so that the reflectors as a whole are locked in the illuminated space by the retaining element in a direction parallel to their vertical axes. When the retaining element is designed as a bearing plate, the latter can, in particular, have a number of recesses corresponding to the number of reflectors, the shape and size of which correspond to the upper end faces of the reflectors. In this way, the retaining element can rest on the aforementioned end faces of the reflectors from above without impeding the emission of light.

[0035] In a further preferred embodiment, the luminaire comprises at least one second holding element which bears against outer lateral surfaces of the reflectors in a central region of a respective reflector between the respective base area and the respective opposite, open end of the respective reflector. For example, the second holding element can be arranged in a height range between 20% and 50% of a height of the respective reflector. The reflectors bear laterally against an edge or edges of the second holding element or bear laterally against the second holding element with their outer lateral surfaces. In this way, the second holding element is suitable for locking the reflectors in the illuminated space in a direction perpendicular to their vertical axes.

[0036] In a particularly preferred embodiment, the second holding element is also formed by a bearing plate, wherein the bearing plate preferably has an edge associated with the lateral surfaces of the reflectors, which edge has a plurality of adjoining circular-arc-shaped edge sections. This embodiment is particularly advantageous when the reflectors are rotationally symmetrical, preferably parabolic, in shape. The second holding element rests against the lateral surface of the reflector along a respective partial circumference of a lateral surface of a respective reflector and thus partially "encloses" it. This has the advantage that forces directed perpendicular to the vertical axis of the respective reflector can be transmitted from the reflector to the second holding element in several mutually and linearly independent directions.In other words, the second retaining element in this embodiment is suitable for locking the reflectors both in the longitudinal direction of the illuminated area and in the width direction of the illuminated area. In areas between adjacent reflectors, the second retaining element can extend into intermediate areas ("gussets") between adjacent reflectors.

[0037] Just like the first retaining element, the second retaining element is preferably firmly connected to the housing of the luminaire, in particular screwed thereto. For this purpose, the housing can provide a plurality of mounting options. These can, for example, include blind holes, each with an internal thread. Such mounting options can cooperate, in particular, with connecting means in the form of screws.

[0038] Furthermore, it can be particularly advantageous if the housing is equipped with a plurality of cooling fins on its exterior or has such cooling fins. The advantages this creates have already been explained above. In particular, such cooling fins improve the dissipation of heat energy generated by the LEDs into the environment. Temperature management of a luminaire equipped with LEDs is particularly important in order to maintain the luminosity of the LEDs for as long as possible and to achieve the longest possible service life for the LEDs.

[0039] Accordingly, it is further advantageous if the housing is formed in one piece, preferably by die-casting. The housing is preferably formed from an alloy, in particular an aluminum-silicon alloy. Such a housing has particularly high thermal conductivity, which improves and facilitates the aforementioned dissipation of thermal energy from the LEDs to the environment. This makes it possible to use LEDs with comparatively high power (for example, up to approximately 100 W) without overheating the LEDs and the associated damage to them.

[0040] The housing is preferably cuboid-shaped, wherein a length of the housing measured parallel to the longitudinal axis of the housing preferably exceeds both a height of the housing measured parallel to the height of the illuminated space and a width of the housing measured parallel to the width of the illuminated space. In other words, the housing is preferably longer than it is high and wide. This results in a typically elongated shape of the housing. A ratio between the length of the housing and its height is preferably at least 1.5:1, preferably at least 2:1. Furthermore, a ratio between the length of the housing and its width is preferably at least 1.5:1, preferably at least 2:1.

[0041] It can also be advantageous if the height of the housing roughly corresponds to the width of the housing. The ratio between the height of the housing and the width of the housing is preferably in the range between 0.8:1 and 1.2:1. This configuration is particularly advantageous when the luminaire is used without separate light-guiding elements or light-directing elements, since the shape of the housing and the illuminated space formed therein enables directed radiation of the light emitted by the LEDs. This was explained above in connection with the configuration of the illuminated space, which preferably has a shape that widens from the illuminated space floor towards the illuminated space opening.

[0042] In a further advantageous embodiment of the luminaire, at least one receptacle is formed on an outer side of the housing, which receptacle is intended and configured to temporarily and positively accommodate a laser pointer, which is used during assembly of the luminaire to align its radiation direction. When aligning the luminaire at an installation location, a laser pointer is usually used to be able to see in which direction the main radiation direction of the luminaire is directed. The receptacle is therefore preferably designed such that a laser pointer received therein or thereon is oriented parallel to the main radiation direction of the luminaire. The housing preferably has a plurality of such receptacles, so that during assembly, the orientation of the luminaire is not important in order to be able to accommodate a laser pointer.When the laser pointer is mounted on or in the holder, the installer has his hands free to work on the luminaire or to install it.

[0043] If the housing has the cooling fins described above, it is particularly advantageous if the at least one receptacle is formed by two adjacent cooling fins that are locally shaped in such a way, in particular with mutually facing, rounded cheeks adapted to a cylindrical housing of the laser pointer, that they are suitable for the positive reception of the laser pointer. In this way, at least two of the cooling fins of the housing can be used in a dual function: firstly, to improve convective heat transfer and secondly, to accommodate a laser pointer.

[0044] In a further particularly advantageous aspect of the present invention, the luminaire can have a bearing joint that is provided and configured to mount the housing on a superordinate cross member. The bearing joint, which as such also represents an invention independent of the rest of the luminaire, is connected to the housing, preferably to an end face of the housing as viewed in the longitudinal direction of the housing.

[0045] The bearing joint is preferably formed by two identical joint parts that are connected to one another, providing a rotational degree of freedom as needed. The connection is preferably designed such that, apart from the aforementioned rotational degree of freedom, no further degrees of freedom are present. Thus, in this embodiment, the joint parts are coupled to one another to form a rotary joint that allows rotation of the two joint parts relative to one another about a joint axis. The two joint parts can be firmly connected to one another by means of at least one connecting mechanism, for example by means of a connecting means or a locking mechanism, in such a way that the rotational degree of freedom is at least temporarily suppressed.With this design, the two joint parts can be locked relative to each other as needed, at least temporarily preventing any rotation of the joint parts relative to each other. During use, the lamp is aligned as desired using the bearing joint, with the two joint parts being rotated relative to each other about the joint axis. Once the desired alignment is achieved, the joint parts are firmly connected to each other, preventing further relative movement.

[0046] Preferably, the two joint parts are of identical construction so that the bearing joint has a symmetrical design overall. The first joint part, which can be connected directly to the housing of the luminaire, can be connected to the housing while providing a rotational degree of freedom as required. If the second joint part is directly connected to a higher-level component, for example a cross member, this is preferably also done while providing a rotational degree of freedom as required. This configuration enables the light's beam direction to be adjusted through a total of three independent rotations, with the first rotation being able to occur at the transition from the higher-level component to the second joint part, the second rotation between the two joint parts, and the third rotation between the first joint part and the housing of the luminaire.This allows the light to be adjusted particularly flexibly and easily, so that precise illumination of the area to be illuminated can be achieved.

[0047] To provide the rotational degree of freedom of at least the first joint part at the transition to the housing, it can be particularly advantageous if the joint part comprises a base plate having two recesses in the shape of a circular arc, which extend at the same radius around a common center point in a plane of the base plate and penetrate the latter. This configuration makes it possible for the joint part to be connected to the housing using two connecting means, one of which is assigned to one of the recesses. The rotational degree of freedom can be achieved particularly easily by releasing the connecting means, in particular in a captive manner, thereby enabling a movement in the form of a rotation of the joint part about a rotation axis oriented perpendicular to the base plate relative to the housing.The user of the bearing joint can then rotate it as desired around the rotation axis relative to the lamp housing and – once the desired position is reached – tighten the connecting elements, thereby locking the joint to the housing. The rotational degree of freedom is thus blocked by a frictional engagement and can be released again at any time by loosening the connecting elements again. The connecting elements can, for example, be formed by screw bolts, each of whose external threads interacts with a corresponding internal thread of the housing.

[0048] Preferably, the bearing joint is designed such that the joint parts each have an internal cable guide, by means of which an electrical cable can be guided concealed through the bearing joint. Examples of implementation

[0049] The invention is explained in more detail below using an exemplary embodiment illustrated in the figures. It shows: Fig. 1: an isometric view of a luminaire according to the invention, Fig. 2: another isometric view of the luminaire according to Figure 1 from a different angle, Fig. 3: a top view of the luminaire according to Figure 1 , Fig. 4: a longitudinal section through the luminaire according to Figure 1 , Fig. 5: a longitudinal section through a further lamp according to the invention, Fig. 6: a schematic cross section through a further lamp according to the invention, Fig. 7: a side view of a bearing joint, Fig. 8: a front view of the bearing joint according to Figure 7 .

[0050] An example that illustrates the Figures 1 to 4 As shown, a luminaire according to the invention comprises 1, which is along a longitudinal axis 3 long housing 2 In the housing 2 is a light room 5designed in the example shown, a total of five LEDs 4 are arranged. The LEDs 4 are designed and configured to emit light so that luminaire 1 can, for example, illuminate a hall or a square.

[0051] The housing 2 In the example shown, it is made of an aluminum-silicon alloy, with the housing 2 is manufactured using the die-casting process. Consequently, the housing 2 formed in one piece. In the example shown, it has a parallel to the longitudinal axis 3 measured length 26 of about 300 mm, a height 27 of about 120 mm and a width 28 of about 130 mm. Therefore, the ratio between the length 26 of the housing 2 and the height 27 of the housing 2 in the example shown 2.5:1. A ratio between the length 26 of the housing2 and the width 28 of the housing 2 In the example shown, the ratio is approximately 2.3:1. A ratio between the height 27 of the housing 2 and the width 28 of the housing 2 In the example shown, the ratio is approximately 0.9:1.

[0052] The housing 2 In the example shown, it is surface-symmetrical with respect to a transverse plane 45 formed perpendicular to the longitudinal axis 3 of the housing 2 extends and the housing 2 into two equal halves. Furthermore, the housing 2 in the example shown, surface symmetrical with respect to a longitudinal plane 46 formed, which extends in the vertical direction of the housing, the longitudinal axis 3 of the housing 2 includes and the housing 2 into two equal halves.

[0053] The housing 2is equipped with a multitude of cooling fins on its outside 25 which are located along three sides of the housing 2 The housing has 2 in the example shown, viewed in the longitudinal direction with regard to the cooling fins 25 three different sections. In two opposite end sections of the housing 2 are the cooling fins 25 in the height direction of the housing 2 parallel to the longitudinal plane 46 oriented, while in a middle section located between the edge sections they are oriented slightly obliquely with respect to the longitudinal plane 46 are oriented, approximately at an angle of 20° to the longitudinal plane 46. This is particularly evident in the Figures 1 and 2 .

[0054] The design of the cooling fins 25 in the end sections of the housing 2in the manner described has the advantage that in each of these end sections a recording 33 can be designed for a laser pointer. This is done accordingly in the example shown, with facing cheeks 34 adjacent cooling fins 25, which are arranged in the respective end section, are rounded in such a way that they are suitable for the positive reception of a laser pointer. Such a pointer can therefore be used by a user of the lamp 1 in the course of an alignment of the same into the recording 33 In this design, the beam direction of the laser pointer is parallel to the main beam direction of the lamp 1 oriented so that the laser pointer can be adjusted during the alignment of the lamp 1 shows in which direction the light 1its light will mainly radiate during its intended operation. At the ends of the recording 33, each of the top of the lamp 1 facing each other, the housing 2 a circular section that allows a penetration 37 This is suitable both for transmitting light emitted by a laser pointer and, if necessary, for positively accommodating the laser pointer.

[0055] The side walls of the housing 1 diagonally oriented cooling fins 25 help to balance the weight of the lamp 1 As a result, the material consumption is lower with this design than if the cooling fins 25 in the middle area of ​​the lamp 1 comparable or identical to the end sections also parallel to the longitudinal plane 46 would be oriented.

[0056] On opposite sides 30 of the housing 2 each has a joint connection 38 which is suitable for use with a bearing joint 29 For this purpose, the joint connection 38 a total of two blind boreholes 39 which are designed and configured to interact with a connecting element (not shown). 39 For example, each have an internal thread, whereby the connecting means can be formed by screw bolts. An advantageous embodiment of a bearing joint 29 is explained separately below.

[0057] On the top of the housing 2 It has a variety of mounting options 47 These are designed and equipped to be connected with corresponding connecting means 48which can be formed by screws, for example. In this way, the top of the housing can 2 particularly easy to cover 40, in particular in the form of a glass cover, in order to illuminate the light space explained separately below 5 in a translucent manner and thus protect against environmental influences. Preferably, a space between the cover 40 and an upper front side of the housing 2 on the top side of which a seal (not shown in the figures) is arranged so that the light space 5 is sealed watertight. In the example shown, the cover is surrounded by a surrounding edge 43 on the housing 2 pressed on. The edge 43 is by means of the connecting means 48 firmly with the mounting options of the housing 2 tied together.

[0058] The light room 5of the housing 2 is parallel to the longitudinal axis 3 of the housing 2 elongated. It includes a light room floor 6 and one opposite the light room floor 6 formed light space opening 7. A vertical axis of the light space not shown in the figures 5 extends parallel to the vertical direction of the housing 2. Therefore, the light room floor 6 at a distance perpendicular to the top of the housing 2 designed or arranged. The light chamber opening 7 is on the top of the housing 2 This is particularly evident in the Figure 1 .

[0059] The LEDs 4 In the example shown, they are directly on or at the light room floor 6 arranged, whereby they are placed on the light room floor 6and each by means of a retaining ring not shown in the figures on the light room floor 6 The retaining rings are connected to the light chamber floor by means of fasteners, in particular screwed. For this purpose, the housing 2 in the area of ​​the light room floor 6 a variety of blind holes 41 which are each equipped with an internal thread. This allows LEDs 4 depending on the requirements and needs of the user of the luminaire 1 at various points on the light room floor 6 arranged and fixed to the light room floor by means of a corresponding retaining ring 6 be locked. The LEDs 4 are in the longitudinal direction of the light space 5 distributed on the light room floor 6 In the example shown, the LEDs are 4 in series parallel to the longitudinal axis 3 of the housing 2arranged and equidistant along the light room floor 6 distributed.

[0060] The LEDs 4 are in the direction of the light chamber opening 7 aligned so that they direct light primarily towards the light chamber opening 7 In other words, the main radiation direction of a respective LED 4 parallel to the vertical axis of the light room 5 or parallel to a vertical axis of the housing 2 This is particularly evident in the Figure 4 . The light room opening 7 is on one long side of the housing 2 formed and extends in an opening plane 11 over a significant part of the length 26 and the width 28 of the housing 2 as well as here and preferably over the entire length 8 and a total width 10 of the light room 5. The light room 5is therefore at its upper, the light room floor 6 The opposite end is completely open. The light chamber opening 7 is designed like a window opening, so that the light room opening 7 a full-surface emission of the light from the LEDs 4 emitted light from the light chamber 5 This allows the light emitted by the LEDs 4 emitted light emanating from the light room floor 6 towards the light room opening 7, through the light room opening 7 through the translucent cover 40 through the lamp 1 exit.

[0061] The light room 5 extends in its longitudinal direction over a substantial part of the housing 2. In the example shown, the angle parallel to the longitudinal axis 3 measured length 8 of the light room 5about 85% of the length 26 of the housing 2. The length 8 of the light room 5 In the example shown, the length is approximately 260 mm. 8 of the light room 5 is in the sense of the present application in the upper opening level 11 of the light room 5 measured in which the light chamber opening 7 The width 10 of the light room 5, which in the opening plane 11 the light room opening 7 and perpendicular to the longitudinal axis 3 of the housing 2 measured is approximately 80 mm in the example shown. A vertical to the opening plane 11 measured height 9 of the light room 5, which is located between the light room floor 6 and the light room opening 7 or the opening level 11extends, is approximately 70 mm in the example shown. Consequently, the length-width ratio between the length 8 of the light room 5 and the width 10 of the light room 5 in the example shown is about 3.25:1. A length-to-height ratio between the length 8 of the light room 5 and the height 9 of the light room 5 In the example shown, the ratio is approximately 4.3:1. A height-to-width ratio between the height 9 of the light room 5 and the width 10 of the light room 5 In the example shown, the ratio is approximately 0.87:1.

[0062] The light room 5 In the example shown, it is designed in such a way that the light chamber walls are opposite each other along the longitudinal sides 12 of the light room 5 starting from the light room floor 6 towards the light room opening 7This expansion is continuous in the present example. In other words, the expanding light space walls 12 in the example shown is flat, so that the light space 5 in a direction perpendicular to the longitudinal axis 3 oriented cross-section has the shape of a trapezoid. The expansion of the illuminated space 5 from the light room floor 6 towards the light room opening 7 can also be described as funnel-shaped or conical. In this case, the light chamber floor 6 one in the width direction of the housing 2 measured width, i.e. the light room walls 12 taper towards the light room floor 6 not to a point. This ensures that the light room floor 6 the LEDs 4 provides a surface where the LEDs 4are mounted as described. The light room walls 12 In the example shown, are opposite the longitudinal plane 46 of the housing 2 arranged at an angle of approximately 20°.

[0063] The lamp 1 is the number of LEDs 4 accordingly with a total of five reflectors 13 equipped, with one of the reflectors 13 an LED 4 The reflectors 13 are each designed in the form of a parabolic reflector, meaning that the reflectors each have a parabolic shape. This is particularly evident in Figure 4 . The reflectors 13 each have a lower base area 15 and one opposite the base area 15 formed, upper open end 16 On the base 15 are the reflectors 13 each in an opening14 which is designed and equipped to be equipped with a respective LED 4 to interact in such a way that the LED 4 in or at the opening 14 and in this way the light emitted by the respective LED 4 emitted light into the reflector 13 or along the reflector 13 In the example shown, the base areas 15 the reflectors 13 completely from the respective opening 14 In other words, the basic 15 the reflectors 13 fully open. The same applies to the open end 16. The reflectors 13 each stand with their base area 15 on the light room floor 6 on.

[0064] A main radiation direction of a respective LED 4 is parallel to a respective vertical axis 17 of the respective reflector 13or parallel to the vertical axis of the light room 5 Here and preferably the main radiation directions of the LEDs are 4 each congruent with the vertical axes 17 the reflectors 13 arranged. The vertical axes 17 the reflectors 13 are parallel to the vertical axis of the light room 5 oriented.

[0065] The reflectors 13 In the example shown, they are each made of aluminum and have a large number of facets on their inner surface, which are designed and configured to emit the light emitted by the respective LED. 4 emitted light towards the upper end 16 In this way, the reflectors 13 particularly well suited to a directed radiation of the light emitted by the LEDs 4 emitted light. The reflectors 13are here and preferably of identical construction.

[0066] The reflectors 13 In the example shown, they are held together by a total of two holding elements 21, 22 in the light room 5 Here and preferably the retaining elements 21, 22 each formed by a bearing plate, which can be made of aluminum, for example.

[0067] The first holding element 21 is the upper ends 16 reflectors 13 assigned and by means of connecting means 35 firmly attached to the housing 2 connected. The holding element 21 on upper end surfaces 23 the reflectors 13 placed so that the reflectors 13 by means of the holding element 21 against the light room floor 6, on which the reflectors 13 at its lower end with its base 15stand up, are tense. In other words, the reflectors 13 between the holding element 21 and the illuminated floor 6 in a direction parallel to their respective vertical axis 17 locked. The first retaining element 21 is perpendicular to the vertical axis of the housing 2 oriented.

[0068] The second holding element 22 is in an area between the first holding element 21 and the light room floor 6 spaced from the first holding element 21 Here and preferably the second holding element 22 parallel to the first holding element 21 oriented. The second holding element 22 is also firmly attached to the housing 2 connected, whereby the housing 2 In the example shown, a number of mounting options 42 by means of which the second holding element 22 using connecting means44 with the housing 2 in a force-transmitting manner. The second holding element 22 acts directly with the outer surfaces of the reflectors 13 together in such a way that the reflectors 13 with their outer surfaces laterally at one edge 24 of the second holding element 22 In this way, a lateral movement of the reflectors 13, that is, a movement perpendicular to their respective vertical axis 17, by the second holding element 22 blocked. Therefore, the reflectors 13 in the light room 5 by means of the second holding element 22 in the direction perpendicular to their vertical axes 17 In the example shown, it is particularly advantageous that the edge 24 of the second holding element 22is partially formed in the shape of a circular arc, so that the second holding element 22 circumferentially on the rotationally symmetrical reflectors 13 In this way, the second retaining element 22 suitable for parallel to the opening plane 11 the light room opening 7 oriented forces from the reflectors 13 to take over and into the housing 2 to derive.

[0069] The reflectors 13 each have one along their respective vertical axis 17 measured height 19 which is located between the base 15 and the open end 16 of the respective reflector 13 Furthermore, the reflectors 13 at its open end 16 one perpendicular to the vertical axis 17 measured diameter 18 The height 19 of a respective reflector 13In the example shown, the diameter is approximately 65 mm. 18 of a respective reflector 13 In the example shown, the diameter is approximately 45 mm. A ratio between the diameter 18 of the reflector 13 and the height 19 of the reflector 13 In the example shown, this is approximately 0.7:1.

[0070] The LEDs 4 In the example shown, they are each circular in shape and also have a diameter 20 In the example shown, this is 11 mm. Therefore, the ratio between the diameter 18 of a respective reflector 13 and the diameter 20 the reflector 13 assigned LED 4 here about 4:1. Furthermore, it follows that a ratio between the height 19 of the respective reflector 13 and the diameter 20 the assigned LED 4is about 5.5:1. The LEDs 4 Here and preferably each have a power of 60 W.

[0071] An alternative design of the lamp 1 is in Figure 5 This differs from the lamp 1 according to the Figures 1 to 4 because only three LEDs 4 and three reflectors accordingly 13 This should clarify that the housing 2 easily with different numbers of LEDs 4 can be equipped to light 1 with different luminous intensities. The variety of mounting options on the light room floor 6 This means that for different configurations of the luminaire 1 not different housings 2 are needed.

[0072] Another design of a lamp 1 is schematically in Figure 6This shows a vertical to the longitudinal axis 3 of the housing 2 guided cross-section in the middle area of ​​the housing 2 through the lamp 1. The trapezoidal design of the housing is particularly good 2 and in particular the light room 5 inside the housing 2 Thus, the opposite lateral light chamber walls extend 12 of the light room 5 starting from the light room floor 6 towards the light room opening 7 at an angle to the longitudinal plane 46 the lamp 1. This requires the described expansion of the light space 5 from the light room floor 6 towards the light room opening 7. In the present example, this expansion occurs continuously. The light room walls 12 are well-developed in themselves.

[0073] On the light room floor 6 is a plurality of LEDs 4 arranged in the longitudinal direction of the light space 5 arranged in a row one behind the other. The light 1 In the example shown, the lamp is completely free of light-guiding elements or light-directing elements in a manner not according to the invention. In particular, the lamp comprises 1 deviating from the two examples from the Figures 1 to 5 no reflectors 13, the one with the LEDs 4 Instead, a light-directing function is provided exclusively by the housing 2 itself, whereby the light room 5 with its shape a radiation direction of the LEDs 4 emitted light. Preferably, the walls of the light chamber 5, especially the light room walls 12,be coated with a light-reflecting coating. In the example shown, where the housing 2 formed by a metal alloy, the walls of the light chamber 5 with a white powder coating. The lamp 1 according to Figure 6 is particularly suitable for use in enclosed spaces, for example within halls.

[0074] Finally, the bearing joint mentioned above 29 particularly well based on the Figures 7 and 8 visible. The bearing joint 29 In the example shown, it comprises two identical joint parts 31, 32, which are connected to each other while maintaining a rotational degree of freedom. For this purpose, the joint parts 31, 32 each have overlapping connecting sections, which are connected by means of a connecting means 50 are connected to each other. The connecting element 50can be locked in such a way that the two joint parts 31, 32 around a joint axis 51 are rotatable relative to each other. It is conceivable that the connecting element 50 adjusted, in particular screwed, in such a way that the possibility of movement of the two joint parts 31, 32 relative to each other. In this way it is possible, in particular, to 29 to a specific position as desired and then the two joint parts 31, 32 by means of the connecting means 50 firmly connected to each other so that this setting cannot be changed again inadvertently.

[0075] At their opposite ends, the joint parts 31, 32 one base each 36 which in the example shown is circular around a longitudinal axis 52 of the respective joint part 31, 32This is particularly evident in the Figure 8 . In the respective base 36 are here and preferably a total of two recesses 49 trained, which forms the basis 36 in a direction parallel to the longitudinal axis. In this way, the respective base 36 particularly well with an associated component, especially the bearing connection 38 a respective luminaire 1 or a crossbeam, by connecting both recesses 49 each interact with a connecting element. The latter can be formed, for example, by a screw bolt. The respective connecting element penetrates the corresponding recesses 49 in the direction parallel to the longitudinal axis 52 of the respective joint part 31, 32 and can be used for the associated component to which the joint parts 31, 32The part to be attached must interact with a corresponding mounting option. This could, for example, be a hole with an internal thread, such as a blind hole.

[0076] The recesses 49 extend in the form of a circular arc around the longitudinal axis 52 of the respective joint part 31, 32. This has the advantage that the respective joint parts 31, 32 around its longitudinal axis 52 can be rotated relative to the associated component, provided the respective connecting elements are not yet firmly tightened. This allows for a particularly simple adjustment of the respective joint part 31, 32 relative to the associated component. In other words, the bearing joint is 29 designed in such a way that it can be used with its two joint parts 31, 32 During assembly, one degree of rotational freedom around the longitudinal axis 52 of the respective joint part31, 32 As soon as a desired position of the respective joint part 31, 32 relative to the associated component, the connecting elements can be tightened and the degree of freedom can be blocked.

[0077] Overall, the bearing joint can 29 This allows a connection between two components with three independent rotational degrees of freedom. Thus, the first joint part 31 around its longitudinal axis 52 relative to the first associated component, for example a lamp 1, the second joint part 32 around its longitudinal axis 52 relative to the second associated component, for example a cross member, and the two joint parts 31, 32 relative to each other around the common joint axis 51 be twisted. Especially when using the bearing joint 29 for storing a lamp 1on a higher-level component, especially a traverse, it is particularly easy to adjust the main beam direction of the luminaire 1 This allows the user to precisely illuminate the respective area to be illuminated. 1 Particularly simplified. In particular, by rotating the second joint part 32 on a cross member and the first joint part 31 on a luminaire, the latter must always be aligned horizontally to the surface to be illuminated, i.e. the opening plane 11 the light room opening 7is oriented parallel to the ground. This is possible regardless of whether the mast on which the truss is mounted is straight, whether the truss is mounted "upright" or "suspended," and / or whether the truss is oriented "flat" (e.g., at an angle of 5° relative to the ground) or "steep" (e.g., at an angle of 60° relative to the ground).

[0078] Here and preferably the bearing joint is 29 designed with a leadthrough for an electrical cable, which allows a concealed routing of an electrical cable within the bearing joint 29 This makes the latter both visually concealed and protected from environmental influences. List of reference symbols

[0079] 1 Luminaire 2 Housing 3 Longitudinal axis of the housing 4 LED 5 Light chamber 6 Light chamber floor 7 Light chamber opening 8 Length of the light chamber 9 Height of the light chamber 10 Width of the light chamber 11 Opening level 12 Light chamber wall 13 Reflector 14 Opening 15 Base area 16 End 17 Vertical axis 18 Diameter 19 Height 20 Diameter 21 First holding element 22 Second holding element 23 End face 24 Edge 25 Cooling fin 26 Length of the housing 27 Height of the housing 28 Width of the housing 29 Bearing joint 30 End face 31 Joint part 32 Joint part 33 Mount 34 Cheek 35 Connecting element 36 Base 37 Through opening 38 Joint connection 39 Blind hole 40Cover 41Blind hole 42Mounting option 43Edge 44Fastener 45Transverse plane 46Longitudinal plane 47Mounting option 48Fastener 49Recess 50Fastener 51Joint axis 52Longitudinal axis

Claims

1. A luminaire (1), in particular for illuminating halls or sports fields, comprising - a housing (2) which is elongated along a longitudinal axis (3) of the housing (2), - a plurality of LEDs (4), wherein the housing (2) has a light chamber (5) extending long parallel to the longitudinal axis (3), wherein the light chamber (5) has a light chamber floor (6) and, opposite the light chamber floor (6), on a long side of the housing (2), a light chamber opening (7) which extends in the manner of a window opening at least substantially over an entire length (8) of the light chamber (5) measured parallel to the longitudinal axis (3) of the housing (2), wherein the LEDs (4) are arranged on the light chamber floor (6) in a manner distributed in the longitudinal direction of the light chamber (5) and are aligned such that they emit light in the direction of the light chamber opening (7), wherein a height-width ratio of the light chamber (5), which has a height (9) of the Light room (5),which is measured perpendicular to an opening plane (11) of the light chamber opening (7) between the light chamber floor (6) and the light chamber opening (7), and a width (10) of the light chamber (5), which is measured in the opening plane (11) of the light chamber opening (7) perpendicular to the length (8) of the light chamber (5), is at least 0.7:1, characterized bya number of parabolic reflectors (13) corresponding to the number of LEDs (4), wherein the reflectors (13) each have a base area (15) provided with an opening (14) and are completely open at their end (16) opposite the base area (15), wherein a reflector (13) is assigned to an LED (4) and is aligned such that the respective LED (4) is arranged in or on the opening (14) of the base area (15) of the associated reflector (13), so that light from the LED (4) is emitted parallel to a vertical axis (17) of the reflector (13) in the direction of the open end (16) of the reflector (13).

2. Luminaire (1) according to claim 1, characterized in that the illuminated space (5) expands, preferably continuously, starting from the illuminated space floor (6) in the direction of the illuminated space opening (7), when viewed in a cross-section perpendicular to the longitudinal axis (3) of the housing (2).

3. Luminaire (1) according to one of the preceding claims, characterized in that the height-width ratio of the illuminated space (5) is in the range between 0.7:1 and 1.2:1, preferably between 0.8:1 and 1:

1.

4. Luminaire (1) according to one of the preceding claims, characterized in that a length-width ratio of the illuminated space (5), which relates the length (8) of the illuminated space (5) and the width (10) of the illuminated space (5), is at least 1.5:1, preferably 2:1, more preferably 2.5:

1.

5. Luminaire (1) according to one of the preceding claims, characterized in that the reflectors (13) are rotationally symmetrical with respect to their respective vertical axis (17), wherein preferably inner lateral surfaces of the reflectors (13) are each formed with a plurality of facets which are provided and configured to direct light emitted by a respective LED (4) in the direction of the respective open end (16) of the respective reflector (13).

6. Luminaire (1) according to one of the preceding claims, characterized in that in at least one of the reflectors (13), a ratio between a diameter (18) of the reflector (13), which is measured perpendicular to the vertical axis (17) of the reflector (13) in an opening plane of the open end (16) of the reflector (13), and a height (19) of the reflector (13), which is measured along the vertical axis (17) of the reflector (13) between the base surface (15) of the reflector (13) and the open end (16) of the reflector (13), is at most 1.2:1, preferably at most 1:1, more preferably at most 0.8:

1.

7. Luminaire (1) according to one of the preceding claims, characterized in thatin at least one of the reflectors (13), a ratio between a diameter (18) of the reflector (13), which is measured perpendicular to the vertical axis (17) of the reflector (13) in an opening plane of the opened end (16) of the reflector (13), and a diameter (20) of the LED (4) assigned to the reflector (13), which is measured perpendicular to the vertical axis (17) of the reflector (13), is at least 2.5:1, preferably at least 3:1, more preferably at least 3.5:

1.

8. Luminaire (1) according to one of the preceding claims, characterized in thatin at least one of the reflectors (13), a ratio between a height (19) of the reflector (13), which is measured along the vertical axis (17) of the reflector (13) between the base area (15) of the reflector (13) and the open end (16) of the reflector (13), and a diameter (20) of the LED (4) assigned to the reflector (13), which is measured perpendicular to the vertical axis (17) of the reflector (13), is at least 3:1, preferably at least 4:1, more preferably at least 5:

1.

9. Luminaire (1) according to one of the preceding claims, characterized in that all reflectors (13) are of identical construction, wherein preferably all reflectors (13) are parabolic in shape and / or made of aluminum.

10. Luminaire (1) according to one of the preceding claims, characterized in that the luminaire (1) is designed to be free of further light-guiding elements, in particular free of lenses, apart from the reflectors (13).

11. Luminaire (1) according to one of the preceding claims, characterized in that the reflectors (13) are each braced against the light chamber floor (6) in a direction parallel to their vertical axes (17) by means of at least one holding element (21), wherein the holding element (21) is preferably formed by a bearing plate which rests on upper end faces (23) of the reflectors (13) and is firmly connected to the housing (2).

12. Luminaire (1) according to claim 11, characterized by at least one second holding element (22) which rests on outer lateral surfaces of the reflectors (13) in a central region between the respective base surface (15) and the respective opposite end (16) of the reflectors (13) and in this way locks the reflectors (13) in the illuminated space (5) in a direction perpendicular to their vertical axes (17).

13. Luminaire (1) according to claim 12, characterized in thatthe second holding element (22) is formed by a bearing plate, wherein preferably an edge (24) of the second holding element (22) assigned to the lateral surfaces of the reflectors (13) has a plurality of adjoining circular arc-shaped edge sections.

14. Luminaire (1) according to one of the preceding claims, characterized in that the luminaire (1) has a bearing joint (29) for mounting the luminaire (1) on a higher-level cross member, wherein the bearing joint (29) is connected to the housing (2), preferably to an end face (30) of the housing (2) viewed in the longitudinal direction of the housing (2).

15. Luminaire (1) according to claim 14, characterized in thatthe bearing joint (29) is formed by two structurally identical joint parts (31, 32) which are connected to one another to provide a rotational degree of freedom, wherein the first joint part (31), which is directly connected to the housing (2), is connected to the housing (2) to provide a rotational degree of freedom.

Images