AT512127B1 - light - Google Patents

Abstract

The luminaire has an elongated housing and rows of LED light sources (10) running in the longitudinal direction of the housing, as well as lenses assigned to at least some of the LED light sources (10), several of which are combined to form a one-piece optical element (15) which, viewed in the transverse direction, extends over several rows of LED light sources (10). Support elements (20) for two groups of LED light sources (10) are provided for emitting light in opposite light emission directions (I, II). The support elements (20) delimit a receiving space running in the longitudinal direction, in which operating devices (60) for the LED light sources (10) are arranged and connect two elongated outer walls or side parts (30) of the housing. The support elements (20) are formed by elongated profile parts, each of which has a central support area for the LED light sources (10) or corresponding LED boards and two lateral wings (21), wherein the lateral wings (21) lie flat against the side parts (30) of the housing.

Description

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Description

LIGHT

[0001] The invention relates to a luminaire with an elongated housing, a plurality of LED light sources arranged in the housing, and lenses assigned to at least some of the LED light sources, wherein those LED light sources to which a lens is assigned are arranged in at least two rows running parallel to one another and in the longitudinal direction of the housing, wherein in each case a plurality of the lenses are combined to form a one-piece optical element which, viewed in the transverse direction, extends over a plurality, preferably all, rows of the LED light sources.

[0002] The compact design of modern LED light sources, combined with high luminous intensity, allows for a high degree of design freedom in the arrangement of the light sources. In particular, this also opens up the freedom to create luminaires with compact dimensions, especially regarding their height.

[0003] In order to make the most extensive use of the capabilities of LED light sources, control gears have been developed that, for example, contribute to the control and regulation of LED light sources using PWM (pulse width modulation). Due to the dimensions of these control gears, a particular challenge is to maintain a compact luminaire design without limiting the light output options.

[0004] If, in addition, rapid adaptability to different lighting requirements is to be ensured, this often excludes the development goal of compact dimensions.

[0005] An LED lamp of the type mentioned above with two LED rows, each LED being provided with an optical system and the entire lens ensemble being made of identical lenses as an injection-molded composite, is disclosed in EP 2 306 069 A1.

[0006] WO 2011/034139 A1, WO 2011/028773 A1 and DE 20 2010 017 009 U1 disclose direct/indirect luminaires with LED light sources.

[0007] Further LED lights with optical elements that can be attached without tools are disclosed in US 2010/0027263 A1, DE 20 2010 000 463 U1 and US 2007/0076427 A1.

[0008] The object of the present invention is to provide an elongated luminaire with compact dimensions, which is nevertheless flexibly adaptable to different lighting situations.

[0009] This object is achieved by the features of claim 1. Further developments are the subject of the dependent claims.

[0010] According to the invention, a luminaire is provided with an elongated housing, a plurality of LED light sources arranged in the housing and lenses assigned to at least some of the LED light sources, wherein those LED light sources to which a lens is assigned are arranged in at least two rows running parallel to one another and in the longitudinal direction of the housing, wherein a plurality of the lenses are combined to form a one-piece optical element which, viewed in the transverse direction, extends over a plurality of rows of the LED light sources, and wherein a plurality of optical elements assigned to the LED light sources can be fastened without tools between a carrier element for the LED light sources and a light exit element.

[0011] Particularly preferably, the optical element extends in the transverse direction over all rows of LED light sources.

[0012] This allows for an extremely compact design of a light emitting unit with multiple LED light sources, which allows for a low overall height of the luminaire while still offering a wide range of light emission options. Preferably, the width of the housing exceeds

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This only slightly changes the dimensions of the optical element in the transverse direction or does not change them in this direction.

[0013] According to the invention, a first group of LED light sources is arranged and designed to emit light in a first light emission direction and a second group of LED light sources is arranged and designed to emit light in a second light emission direction, which is opposite to the first light emission direction, wherein the two groups of LED light sources are designed to be controllable independently of one another.

[0014] The luminaire may, for example, comprise a corresponding operating device designed to independently control and regulate the operation of the two groups of LED light sources.

[0015] Preferably, the luminaire is a pendant luminaire or wall luminaire, wherein the first group of LED light sources contributes to direct lighting, while the second group of LED light sources serves to provide indirect lighting.

[0016] In a further development, the housing is closed with one or more light-emitting elements, which preferably form the top surface and the bottom surface of the housing. For indirect lighting, but also for direct lighting, it is also conceivable for the light-emitting element(s) to be designed as a diffuser.

[0017] The possibilities for designing the light output can be extremely flexible in the manner described above and, furthermore, compact dimensions can also be realized with the help of the independently controllable LED light sources.

[0018] According to the invention, the possibilities for a compact design are further supported by support elements for the two groups of LED light sources, wherein the support elements delimit a receiving space extending in the longitudinal direction of the luminaire, in which one or more operating devices for the LED light sources are arranged.

[0019] Thus, the control gears are arranged in an area between the two LED groups, resulting in a narrow, filigree design of the luminaire.

[0020] For example, the support elements can be substantially planar or flat and, for example, arranged parallel to one another. In particular, the flat sides of the support elements can be oriented parallel to one another, with the light emitted by the LED light sources being substantially orthogonal to the flat side of the respective support element.

[0021] Furthermore, it could be provided, for example, that the operating device or devices for the LED light sources are connected to the support element for the LED light sources for heat dissipation.

[0022] According to the invention, the housing further comprises two elongated outer walls or side parts, which are connected to each other by the support element for the LED light sources. The outer walls can thus contribute to heat dissipation from the LED light sources. Therefore, the elongated outer walls or side parts are preferably made of metal, in particular of an extruded aluminum profile.

[0023] Furthermore, according to the invention, one or more of the support elements for the LED light sources are formed by elongated profile parts, each of which has a central support area for the LED light sources or corresponding LED boards, as well as two lateral wings, wherein the lateral wings rest flatly against the outer walls of the housing, in particular against the side panels. This design includes the aforementioned, essentially flat embodiment of the support elements, which can also extend over the entire length of the luminaire.

[0024] This again supports heat dissipation from the LED light sources via the housing. Particularly preferably, the use of a separate heat sink for the LED light sources can be eliminated, thus allowing compact dimensions of the luminaire to be achieved.

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[0025] In particular, it can be provided that both the outer walls or side parts and the support element for the LED light sources are designed to dissipate heat from the LED light sources.

[0026] Furthermore, it is also conceivable that the operating device(s) for the LED light sources are connected to the outer walls or side parts of the housing for heat dissipation.

[0027] Furthermore, the light output can be designed particularly flexibly, and the length of the luminaire can be varied almost arbitrarily, if several optical elements associated with the LED light sources are arranged one after the other in the longitudinal direction, wherein the optical elements preferably have identical dimensions. In particular, the optical elements can be the integrally connected lenses already mentioned.

[0028] Thus, for example, a modular structure of the luminaire can be created.

[0029] The carrier element, and for example also a correspondingly assigned LED board, or also the walls of the housing can preferably be designed to be cut to length in corresponding module sizes or can be separated in corresponding module sizes.

[0030] Said separability can also be supported, for example, by the material selection of the housing, the support elements, or the light-emitting elements. Preferably, the housing material or the material of the support element is aluminum, and particularly preferably, the light-emitting element is made of PMMA (polymethyl methacrylate) and can be implemented as a substantially transparent plate.

[0031] The separability in module sizes can be further supported by the fact that fastening elements for the elongated luminaire are connected to the front side of the luminaire, so that the fastening can be carried out independently of the change in the longitudinal extension of the luminaire.

[0032] Particularly preferably, several optical elements associated with the LED light sources can be attached without tools between the support element for the LED light sources and a light exit element for light from the LED light sources, and can also be reversibly removed. The optical elements can, in particular, be the integrally connected lenses already mentioned.

[0033] For example, a clamping fixation of the optical elements between the carrier element and the light exit element can be provided.

[0034] In addition, the carrier element or the LED board can also have elements for aligning the carrier element or the LED board with the optical element.

[0035] For example, corresponding guide elements could be realized by guide pins or bores that engage with each other.

[0036] However, the LED light sources are particularly preferably designed as a guide element or guide elements. For example, it is conceivable for the LED light sources to engage in alignment with the optical element. In particular, the optical element can comprise a square recess for the LED light sources, so that, when the engagement is aligned, rotational movement of the optical element relative to the LED light sources is suppressed.

[0037] Furthermore, it is conceivable that the light exit element can be attached without tools. For example, the housing or outer walls of the housing, in particular the side parts of the housing, can have guide means.

[0038] Particularly preferably, the guide means of the housing or the side parts comprise insertion slots into which the light exit element can be inserted, which in this case is particularly preferably designed as a transparent pane.

[0039] In this way, not only a simple fastening of the light exit element can be achieved

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but by a flat design of the light exit element, which allows a certain flexibility, the clamping fixation of the optical element can also be supported at the same time.

[0040] The invention will be explained in more detail below with reference to the accompanying drawings, in which identical elements are provided with the same reference numerals throughout. They show:

[0041] Fig. 1 is a partial view of an embodiment of a luminaire according to the invention;

[0042] Fig.2 is a perspective view of an embodiment of the luminaire in a plan view;

[0043] Fig.3 is a perspective view from below of an embodiment of the luminaire; and

[0044] Fig.4 shows a further embodiment of a luminaire according to the invention in cross section.

[0045] The exemplary embodiments presented below exclusively show pendant luminaires. However, the invention is not limited to pendant luminaires; other types of luminaires are also included within the inventive concept; for example, these can be elongated floor lamps, preferably with a substantially horizontal light output, or elongated wall luminaires or strip lights.

[0046] Figure 1 shows a partial section of a luminaire according to the invention in an exploded view.

[0047] The exemplary embodiment is an elongated pendant luminaire with a substantially rectangular, in particular square, cross-section transverse to the longitudinal direction, which realizes a particularly compact design in the cross-section transverse to the longitudinal extension or longitudinal direction of the luminaire. The basic shape of the luminaire can thus be described as a cuboid.

[0048] A detailed overview of the components of the housing is also provided, for example, in Figure 2, which describes the identical embodiment. The housing in the longitudinal direction of the luminaire is formed by two elongated side parts 30 or outer walls made of aluminum and two preferably transparent light-emitting elements 33 as cover and base surfaces, respectively.

[0049] Transversely to the longitudinal direction, the housing is closed by end caps 37, which encompass both the side parts 30 and the light exit elements 33, so that, for example, cutting edges on said surfaces or elements can be concealed and the stability of the housing is also increased.

[0050] As can be seen in detail in Figure 1, the end caps 37 are connected to suspension means 42 or themselves form suspension means 42, so that the luminaire can be mounted independently of housing surfaces or components that run in the longitudinal direction of the luminaire. As will become clear later, this provides a particular advantage when adapting the length of the luminaire to the needs of a user.

[0051] The suspension means 42 may also comprise a strain relief 43 for cables for the electrical supply of the luminaire.

[0052] A plurality of LED light sources 10 are arranged in the housing, wherein at least some of the LED light sources 10 are assigned lenses.

[0053] In the exemplary embodiment, those LED light sources 10 to which a lens is assigned are arranged in at least two rows parallel to one another and extending in the longitudinal direction of the housing.

[0054] In order to promote a compact design, several of the lenses are combined to form a one-piece optical element 15, which extends over several rows of the LED light sources 10, viewed in the transverse direction of the luminaire.

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[0055] In the exemplary embodiment, the optical element 15 comprises a plurality of lenses arranged in a grid or array. Each of the lenses is assigned to one of the LED light sources 10, and the lens is designed to collimate or limit the beam angle of the respective LED light source 10, so that the optical element 15, in combination, reduces glare in the light emitted by the luminaire, which in this case is direct.

[0056] A corresponding lens of the exemplary embodiment is essentially conically shaped, with a recess arranged in the lens as a light entry surface for light from the LED light source(s) 10, and furthermore facing one of the LED light sources 10 or into which one of the LED light sources 10 projects. The lateral surface of the essentially transparent conical lens forms a reflection surface that limits or defines the radiation angle of the respective LED light source 10 associated with the lens. In a further development, it is conceivable that the lateral surfaces of the lens are at least partially mirrored.

The arrangement of the LED light sources in a recess in the lenses offers several advantages. On the one hand, this optimizes the coupling of light into the lenses. Furthermore, the overall height of the luminaire can be reduced, and, as will also become clear, the tool-free attachment of the optical element 15 in the luminaire offers particular advantages.

[0057] The optical element 15 further comprises a flat underside, which faces the light exit element 33 defining the housing and which adjoins it flatly. Thus, optical distortions caused by an additional air transition between the optical element 15 and the light exit element 33 are essentially avoided; this can also be supported by selecting identical materials for the two elements. In particular, the flat underside can be implemented similarly for each lens, so that the lens or each of the lenses can have a flat light exit side.

[0058] Furthermore, as will become clear later, this makes it possible to attach the optical element particularly easily and without tools in the housing of the luminaire.

[0059] The luminaire comprises a first group and a second group of LED light sources 10. The first group of LED light sources 10 is arranged and configured to emit light in a first light emission direction | (see Fig. 2). Furthermore, the second group of LED light sources 10 is arranged and configured to emit light in a second light emission direction II, which is opposite to the first light emission direction I.

[0060] The two groups of LED light sources 10 can still be controlled independently of each other.

[0061] Thus, according to the exemplary embodiment, a particularly compact luminaire can be created which, for example, can emit direct light with the aid of the first group of LED light sources 10 in a first light emission direction | and indirect light with the aid of the second group of LED light sources 10 in a second light emission direction I!.

[0062] The LED light sources 10 or the first group of LED light sources 10 are arranged on an LED circuit board with identical grid or field dimensions as the optical element 15. According to the exemplary embodiment, the LED light sources 10 are arranged in two rows in the longitudinal direction of the luminaire.

[0063] The LED board may have preferential dividing elements that allow the LED board to be cut to length without interrupting or impairing the power supply to the remaining LED light sources 10.

[0064] Furthermore, the LED board can be designed to dissipate heat from the LED light sources and can, for example, comprise corresponding metallic heat dissipation channels or heat pipes or the like.

[0065] The use of thermal pastes to improve heat dissipation can also be provided for fixing the LED board.

[0066] In this embodiment, the LED board is connected to a carrier element 20 in a heat-conducting manner; the carrier element 20, as can be seen particularly easily from Figure 3,

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shows an embodiment identical to Figures 1 and 2, formed by a flat support plate which has wings or fins arranged on the sides.

[0067] The described support element 20 facing the optical element 15 is thus formed by an elongated profile part, which has a central support area for the LED light sources 10 or corresponding LED boards, as well as two lateral wings 21. It is particularly advantageous that the lateral wings 21 rest flat against the side parts 30 or outer walls of the housing.

[0068] The elongated outer walls or side parts 30 of the housing are connected to one another by the support element 20 for the LED light sources 10. In particular, the side parts 30 or outer walls, designed as profile parts, have guide slots that enable a tool-free connection of the support element 20 and the side parts 30 or outer walls. The wings 21 or fins of the support element 20 come into surface contact with the side parts 30 or the outer walls, so that a relatively large contact surface is formed, which, in addition to a secure, torsion-resistant connection, also optimizes the heat transfer from the support element 20 or the LED light sources 10 to the outer walls or side parts 30 of the luminaire. A separate heat sink for the LED light sources 10 can thus be omitted, which in turn enables a filigree luminaire design.

[0069] The outer walls or side parts 30 also have guide elements that enable a tool-free connection of the light exit element 33 to the side parts or outer walls 30. In the exemplary embodiment, the guide elements are formed by insertion slots for a flat, substantially transparent light exit element 33. The distance of the guide elements from the support element 20 is dimensioned such that the optical element 15 is clamped between the light exit element 33 and the LED board or the support element 20.

[0070] In the illustrated embodiment, it is particularly necessary that the light exit element 33 is flush with the optical element 15 via a substantially flat surface and preferably has a certain degree of flexibility.

[0071] To further fix the position of the optical element 15, it is provided in the embodiment that the LED board or the carrier element 20 comprises guide elements for connection to or position fixing relative to the optical element 15.

[0072] For this purpose, the LED light sources 10 have a substantially square cross-section parallel to the planar extension of the optical element 15. The optical element 15 comprises corresponding recesses into which the LED light sources 10 engage in alignment, so that a rotational movement of the optical element 15 can be substantially suppressed. This can be particularly usefully achieved with an unpackaged version of LED chips, which in turn have a low overall height, so that the dimensions of the luminaire can be kept compact in cross-section.

[0073] The optical element 15 thus also comprises guide means which cooperate in alignment with the LED light sources 10, wherein the guide means simultaneously form a light entry surface into the optical element 15, which in this embodiment is essentially transparent.

[0074] In particular, since each of the LED light sources 10 is also designed as a guide element, an extremely secure connection with the optical element 15 can be realized.

[0075] Furthermore, the luminaire has a further support element 20 for the second group of LED light sources 10. This is again realized as a flat support plate or profile part with lateral wings or fins 21, which can be connected in the same way to the side parts or outer walls 30 without tools, and ensures correspondingly excellent heat dissipation of the LED light sources 10. The second group of LED light sources 10 is again arranged on an LED board that is essentially identical to the previously described LED board in a row in the longitudinal extension of the luminaire, wherein, for reasons of height, unhoused LED chips are again preferably used.

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[0076] The support elements 20 for the first and second group of LED light sources 10 extend over the entire longitudinal extent of the luminaire and delimit a longitudinally extending receiving space in which one or more operating devices 60 for the LED light sources 10 are arranged.

[0077] This results in a particularly compact design of the luminaire, the width of which does not differ significantly from the dimension of the optical element 15.

[0078] Particularly advantageously, the support elements 20 are arranged parallel to each other to delimit the receiving space.

[0079] The operating devices 60 are arranged between the support elements 20, and the receiving space for the operating devices directly adjoins an outer wall or side part 30 of the housing, or is also delimited by an outer wall or side part 30 of the housing. This opens up the possibility of operating devices 60 being in heat-conducting contact with the outer wall or being connected to the outer wall for heat dissipation. For example, the side part 30 designed as a profile body could also have holders for operating devices 60 or receptacles for tool-free fastening of the operating devices. Preferably, slide-in rails could be provided which enable surface contact of the operating devices 60 with the outer wall 30, as is particularly clearly shown, for example, in Figure 3. In particular, several fastening means of one of the operating devices 60 can face an outer wall or a side part 30 in order to form the surface contact.

[0080] In the exemplary embodiment of Figures 1 to 3, a single operating device is provided which is designed to regulate and control both the operation of the first group of LED light sources 10 and the operation of the second group of LED light sources 10 independently of one another. The operating device comprises a plurality of pulse width control units, wherein at least one of the pulse width control units is assigned to the first or second group of LED light sources 10, so that the first group of LED light sources 10 can, for example, be operated or controlled independently of the second group of LED light sources 10 in its light output. Furthermore, independent control and regulation of the light color of the first or second group of LED light sources 10 can also be provided with the aid of the individual operating device 60 of this exemplary embodiment. Furthermore, it is also conceivable for the operating device 60 to be designed to communicate with a bus system in order to regulate or control the operation of the luminaire.

[0081] The second group of LED light sources 10 emits its light essentially in the second light emission direction II; in the case of the pendant luminaire shown, this is in the direction of a luminaire support or a room ceiling. For indirect light emission, in this exemplary embodiment, only the second group of LED light sources 10 is used; in this exemplary embodiment, the indirect light emission occurs via a substantially flat light exit element 33 forming the cover side of the luminaire, which can preferably be designed as a diffuser. For ambient lighting, it can then advantageously be provided that the light color of the indirect lighting differs from the light color of the direct lighting, which in this exemplary embodiment occurs exclusively via the first group of LED light sources 10.

[0082] The stylistic device of ambient lighting can be used particularly advantageously when the dimensions and light output of the luminaire are tailored to the architectural constraints. In the embodiment shown in Figures 1 to 3, the longitudinal extension of the luminaire is designed to be adaptable in a partially modular design.

[0083] For this purpose, it can be provided that the optical element 15 does not extend over the entire longitudinal extent of the luminaire, as provided in Figures 1 or 2, but rather a plurality of optical elements 15 assigned to the LED light sources 10 are arranged one after the other in the longitudinal direction.

[0084] The optical elements 15 can preferably have identical dimensions, thus virtually defining a module length. However, different dimensions of the optical elements 15 are also conceivable, as can be seen, for example, in Figure 3, and in the invention.

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The invention also includes the idea that a single optical element 15 extends over the entire longitudinal extent of the luminaire.

[0085] Due to the above-described construction, the housing, in particular the side parts 30, the light-emitting elements 33, and the support elements 20, can now be easily cut to a length predetermined by the optical element(s) 15, so that, for example, with a suitable number of optical elements 15 arranged consecutively along the length of the luminaire, the length of a table can be substantially reproduced and, for example, the length of the luminaire can be adjusted in units between 1 cm and 50 cm, preferably between 5 cm and 20 cm. The optical elements 15 can have the aforementioned dimensions along their length.

[0086] In order to enable particularly easy cutting to length, the side parts 30 are preferably made of aluminum and the light exit elements 33 are made of PMMA.

[0087] A particularly preferred development can result from the luminaire housing or the support element 20 having space to add, for example, a further row of LED light sources 10 in the transverse direction. For example, each row of LED light sources 10 can be arranged on a separate circuit board. Advantageously, one of the above-described plurality of optical elements 15 can be designed such that it is assigned to a first number of LED light sources 10 in the transverse direction and to a second number of LED light sources 10 in the longitudinal direction, wherein the first and second numbers of LED light sources 10 differ. By rotating the optical element 15, a simple adaptation to a changed number of rows of LED light sources 10 in the transverse direction of the luminaire is then possible.

[0088] For example, one of the multiple optical elements 15 of the exemplary embodiment can be assigned to the LED light sources 10 in a "2x3" grid, i.e., three LED light sources 10 in the longitudinal direction and two LED light sources 10 in the transverse direction. The arrangement of the LED light sources 10 can be provided such that by rotating the optical element 15, in particular when adding a further row of LED light sources 10, a grid of two LED light sources 10 in the longitudinal direction and three LED light sources 10 in the transverse direction is now easily assigned to the optical element 15. The complete replacement of all optical elements 15 can thus be obsolete when expanding the luminaire, so that purchasing a few additional optical elements 15 allows the luminaire to be expanded, for example, by adding a further row of LED light sources 10, in a modular manner.

[0089] The embodiment of Figure 3 exclusively shows several optical elements 15, which have identical light emission and are formed by the above-described integrally connected lenses, thus resulting in a simple length variation. However, optical elements 15 can also be provided that have different light emission.

[0090] Thus, for example, accent lighting can be realized, which, for example in the case of a wall light, could particularly illuminate a seating area.

[0091] As described above, in the embodiment of Figures 1 to 3, it is provided to fasten several of the optical elements 15 between the carrier element 20 for the LED light sources 10 and the light exit element 33 without tools.

[0092] The fastening is provided in particular in a clamping manner as described above, so that the possibilities for changing the light output are drastically increased, whereby the appearance and dimensions of the luminaire are not changed.

[0093] The embodiment shown in cross-section in Figure 4 differs from the embodiment shown in Figures 1 to 3 in that the support element 20 for the first group of LED light sources 10 is integrally connected to the side parts 30 of the luminaire. The assembly comprising the support element 20 and the side parts 30 thus forms a heat sink for the LED light sources 10.

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[0094] In the exemplary embodiment, it is further provided that, in contrast to the exemplary embodiment of Figures 1 to 3, the operating device 60 is in direct contact with the carrier element 20 for the first group of LED light sources 10, so that particular advantages can result in heat dissipation and control of the LED light sources 10.

[0095] In the exemplary embodiment, the direct contact of the operating device 60 is also realized for the carrier element 20 for the second group of LED light sources 10, so that the advantages in the control of the LED light sources 10 and the heat dissipation can thus be further improved.

[0096] Thus, it can be stated that the invention defines an elongated luminaire with LED light sources 10 in compact dimensions, which can be flexibly adapted to different lighting requirements.

[0097] Furthermore, it should be pointed out that, within the scope of the invention, it is also conceivable to combine all of the features described above or shown in the figures in any advantageous manner.

Claims (5)

A 'hes AT 512 127 B1 2025-10-15 Ss N patent claims 1. A luminaire with an elongated housing, a plurality of LED light sources (10) arranged in the housing, and lenses assigned to at least some of the LED light sources (10), wherein those LED light sources (10) to which a lens is assigned are arranged in at least two rows running parallel to one another and in the longitudinal direction of the housing, wherein a plurality of the lenses are combined to form a one-piece optical element (15) which, viewed in the transverse direction, extends over a plurality of, preferably all, rows of the LED light sources (10), characterized in that a plurality of optical elements (15) assigned to the LED light sources (10) can be fastened without tools between a carrier element (20) for the LED light sources (10) and a light exit element (33), wherein a first group of the LED light sources (10) is arranged and designed to emit light in a first light emission direction (I) and a second group of the LED light sources (10) is arranged and designed to emit light in a second light emission direction (II) which is opposite to the first Light emission direction (I), wherein the two groups of LED light sources (10) are designed to be controllable independently of one another, wherein support elements (20) for the two groups of LED light sources (10) delimit a receiving space running in the longitudinal direction, in which operating devices (60) for the LED light sources (10) are arranged, wherein the housing comprises two elongate outer walls or side parts (30) which are connected to one another by the support elements (20) for the LED light sources (10), wherein the support elements (20) for the LED light sources (10) are formed by elongate profile parts which each have a central support area for the LED light sources (10) or corresponding LED circuit boards and two lateral wings (21), wherein the lateral wings (21) lie flat against the side parts (30) of the housing. 2. Luminaire according to claim 1, characterized in that both the outer walls or side parts (30) and the support element (20) are designed to dissipate heat from the LED light sources (10). 3. Luminaire according to one of the preceding claims, characterized in that a plurality of optical elements (15) assigned to the LED light sources (10) are arranged one after the other in the longitudinal direction, wherein the optical elements (15) preferably have identical dimensions. 4. Luminaire according to one of the preceding claims, characterized in that the light exit element (33) clamps the optical elements (15) in place. 5. Luminaire according to one of the preceding claims, characterized in that the light exit element (33) can be fastened without tools. 4 sheets of drawings 10 / 14