AT512127A2 - lamp - Google Patents

Abstract

The invention relates to a luminaire with an elongated housing, a plurality of LED light sources (10) arranged in the housing, and lenses associated with at least one part of the LED light sources (10). Those LED light sources (10) to which a lens is associated 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 (15) which is seen in the transverse direction extends over several rows of LED light sources (10).

Description

The invention relates to a luminaire with an elongated housing and a plurality of LED light sources arranged in the housing.

The compact design of modern LED light sources combined with high luminous intensity enables a high degree of creative freedom in the arrangement of the 10 light sources. In particular, this also opens the freedom to realize lights with compact dimensions, especially regarding their height.

In order to be able to use the possibilities of the LED light sources as extensively as possible, operating devices have been established which, for example, use PWM 15 (pulse width modulation) to control and regulate the operation of the LED lamps.

Contribute light sources. Due to the size of these operating devices, a particular challenge is still maintaining a compact luminaire design, without limiting the possibilities in the light output. 20 Should also have a fast adaptability to different

Given lighting requirements, this often precludes the development goal of compact dimensions.

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

This object is achieved with the features of the independent claims 1 and 2. Further developments are the subject of the dependent claims. 30

According to the invention, a luminaire is provided with an elongated housing, a plurality of LED light sources arranged in the housing and at least one part of the LED light sources, wherein those LED light sources, which are associated with a lens, in at least two parallel to each other and in the longitudinal direction rows of the housing are arranged, wherein in each case a plurality of the lenses are combined to form a one-piece optical element, which extends in the transverse direction over a plurality of rows of LED light sources.

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

Thus, an extremely compact design of a light emitting unit with multiple LED light sources can be realized, which allows a low height of the lamp and yet designed the possibilities for light delivery diverse.

Preferably, the width of the housing in the transverse direction only slightly or not, not the dimensions of the optical element in this direction.

According to another aspect of the invention, there is provided a luminaire having an elongated housing and a plurality of LED light sources disposed in the housing, a first group of the LED light sources being arranged and configured to emit light in a first light emanating direction and a second group of the LED Light sources for emitting light in a second Lichtabstrahlrichtung which is opposite to the first Lichtabstrahlrichtung, is arranged and formed, wherein the two groups of LED light sources are formed independently controllable from each other.

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

The luminaire is preferably a pendant luminaire or wall luminaire, with the first group of LED light sources contributing to direct illumination, while the second group of LED light sources is used for indirect illumination. In a further development, the housing is closed in each case with one or more light exit elements, which preferably each form the top surface and the bottom surface of the housing. For indirect lighting but also for direct lighting is also conceivable that the light exit element or the light exit elements is or are designed as a diffuser.

The possibilities of designing the light output can be made extremely flexible in the manner described above and also compact dimensions can be realized with the help of independently controllable LED light sources.

The possibilities for compact design could continue to be supported by carrier elements for the two groups of LED light sources, wherein the • # »•» I ····

Carrier elements limit a running in the longitudinal direction of the light receiving space in which one or more operating devices for the LED light sources are arranged. 5 Thus, the operating devices are arranged in an area between the two LED groups, resulting in a narrow, filigree design of the lamp. For example, the carrier elements may be formed substantially flat or flat and, for example, be arranged parallel to each other. In particular, the flat sides of the carrier elements may be oriented parallel to each other, wherein the light emission of the LED light sources is in each case substantially orthogonal to the flat side of the respective carrier element.

Furthermore, it could be provided, for example, that the operating device or the operating devices for the LED light sources are connected to the carrier element for the LED 15 light sources for heat dissipation.

In a further development, the housing comprises two elongate outer walls or side parts, which are connected to one another by the carrier element for the LED light sources. The outer walls can contribute accordingly to the heat dissipation of the 20 LED light sources. Preferably, the elongated outer walls or

Side parts therefore made of metal, in particular of an extruded aluminum profile formed.

One or more of the support elements for the LED-25 light sources are particularly preferably formed by elongate profile parts, which each have a central contact area for the LED light sources or corresponding LED boards and two lateral wings, wherein the lateral wings are flat on the outer walls of the Housing, especially on side panels, abut. This training includes the mentioned, substantially planar embodiment of the 30 support elements, which can also extend over the entire length of the lamp.

Thus, in turn, the heat dissipation of the LED light sources can be supported via the housing. Particularly preferably, the use of a separate heat sink for the LED light sources can be dispensed with, so that once again compact dimensions of the luminaire can be achieved. • *

In particular, it can be provided that both the outer walls or side parts and the support element for the LED light sources for heat dissipation of the LED light sources are formed.

Furthermore, it is also conceivable that the or the operating devices for the LED light sources are connected to the outer walls or side parts of the housing for heat dissipation.

Furthermore, the light output can be designed to be particularly flexible and also the length of the lamp can be changed almost arbitrarily if several, the LED light sources associated optical elements are arranged consecutively in the longitudinal direction, wherein the optical elements preferably have identical dimensions. In particular, the optical elements may be the integrally connected lenses already mentioned.

Thus, for example, a modular structure of the lamp can be created.

The carrier element, and for example also a correspondingly assigned LED board, or 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.

Said separability can be supported, for example, by the material selection of the housing, the carrier elements or the light exit elements. The housing material or the material of the carrier element is preferably aluminum, and particularly preferably the light exit element is made of PMMA (polymethyl methacrylate) and can be realized as a substantially transparent plate.

Assistance can continue to learn the separability in module sizes in that fasteners for the elongated lamp are connected to the front side of the lamp, so that the attachment can be made independently of the change in the longitudinal extent of the lamp.

Particularly preferred are multiple, the LED light sources associated optical elements between the support element for the LED light sources and a light exit element for light of the LED light sources without tools fastened and reversibly solvable. The optical elements may in particular be the integrally connected lenses already mentioned. • # ·· • »··

For example, a clamping fixing of the optical elements between the support member and the light exit member may be provided. 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. For example, corresponding guide elements could be realized by guide pins or holes that come into mutual engagement. However, the LED light sources are particularly preferably designed as a guide element or guide elements. For example, it is conceivable that the LED light sources engage in alignment in the optical element. In particular, the optical element may comprise a square recess for the LED light sources, so that a flush movement of the optical element with respect to the 15 LED light sources is suppressed when aligned.

Furthermore, it is conceivable that the light exit element can be fastened without tools. For example, the housing or outer walls of the housing, in particular the side parts of the housing, have guide means. 20

Particularly preferably, the guide means of the housing or the side parts insertion slots, into which the light exit element can be inserted, which is particularly preferably designed as a transparent disc in this case, 25 In this way, not only a simple attachment of the light exit element can be achieved but by a flat configuration of the light exit element, which allows a certain flexibility, at the same time the clamping fixing of the optical element can be supported. Below, the invention will be explained in more detail with reference to the accompanying drawings, wherein like elements in all representations are provided with the same reference numerals. Show it:

Fig.l a partial view of a AusführungsbeiSpiels a lamp according to the invention; FIG. 2 shows a perspective view of an embodiment of the luminaire in a plan view; FIG.

3 is a perspective view from below of an embodiment of the lamp; and * · «I ft« · * ·· * «* * * ·

4 shows a further exemplary embodiment of an inventive lamp in cross section,

The embodiments shown below show only pendant lights, but the invention is not limited to a pendant lamp, in the inventive idea, other types of lights are included; For example, it may be oblong floor lamps, preferably with a substantially horizontal light output, or even elongated wall lights or light bands.

Figure 1 shows a partial section of a lamp according to the invention in an exploded view.

In the exemplary embodiment, it is an elongate pendant lamp, with one, transverse to the longitudinal direction, substantially rectangular, in particular square cross-section, which realizes a particularly compact design in cross-section transverse to the longitudinal extent or longitudinal direction of the lamp. The basic shape of the lamp can therefore be described by a cuboid.

For a detailed overview of the components of the housing, for example, Figure 2, which describes the identical exemplary embodiment. The housing in the longitudinal direction of the luminaire is formed by two elongated side parts 30 and outer walls made of aluminum and two preferably transparent light exit elements 33 as cover or bottom surfaces.

Transverse to the longitudinal direction of the housing is completed in each case by end caps 37 which engage around both the side parts 30 and the light exit elements 33, so that, for example, cutting edges on said surfaces or elements can be covered and the stability of the housing is also increased.

As can be seen again in detail from FIG. 1, the end caps 37 are connected to suspension means 42, or themselves form suspension means 42, so that the attachment of the luminaire can be independent of housing surfaces or components extending in the longitudinal direction of the luminaire. As will become clear in the later, this requires a special advantage in adapting the length of the luminaire to the needs of a user. 4 * «« * · ·· «·····················································································« · |

The suspension means 42 may also comprise a strain relief 43 for cables for the electrical supply of the lamp.

In the housing, a plurality of LED light sources 10 are arranged, wherein at least a part of the LED light sources 10 are associated with lenses.

In the Ausfuhrungsbei play those LED light sources 10, which is associated with a lens, arranged in at least two parallel to each other and extending in the longitudinal direction of the housing rows.

In order to promote a compact design, several of the lenses are combined to form a one-piece optical element 15, which extends in the transverse direction of the lamp over several rows of LED light sources 10 extends. In the embodiment, the optical element 15 comprises a plurality of lenses arrayed in a grid. Each of the lenses is associated with one of the LED light sources 10, and the lens is designed to collimate or limit the emission angle of the respective LED light source 10, so that the optical element 15 in combination requires a posting of the direct light output of the lamp in this case ,

A corresponding lens of the embodiment is substantially conically shaped, with a recess which is arranged as a light entry surface for light of the LED light source or LED light sources 10 in the lens, and moreover one of the LED light sources 10 faces, or into which one of the LED light sources 10 protrudes. The lateral surface of the substantially transparent conical lens forms a reflection surface which limits the emission angle of the respective LED light source 10 allocated to 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 of the lenses, thereby causing several advantages. On the one hand, the light coupling into the lenses can thereby be optimized. Furthermore, the overall height of the lamp can be reduced and as is further clear, there are particular advantages in the tool-free attachment of the optical element 15 in the lamp.

The optical element 15 further comprises a flat underside, which faces the housing-limiting light exit element 33, and which adjoins this area. Thus, visual distortions due to an additional air transition between the optical element 15 and the light exit element 33 are in the following manner: ## EQU3 ## ** «*» • · · · · A 9 9 9 • · 99 «9 · ·« Ο · §9

Essentially avoided; this can also be supported by an identical choice of material of the two elements. In particular, the flat bottom can be realized for each lens as well; so that the lens or each of the lenses can have a flat light exit side.

Furthermore, it follows, as will become clear later, the possibility of attaching the optical element particularly simple tool-free in the housing of the lamp.

In the exemplary embodiment, the luminaire has a first group and a second group of the 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 I (see FIG. Further, the second group of the LED light sources 10 for emitting light in a second light emission direction II, which is opposite to the first light emission direction 1, arranged and formed.

The two groups of LED light sources 10 are furthermore independently controllable.

Thus, according to the embodiment, a particularly compact lamp can be created, which can radiate, for example, direct light with the aid of the first group of LED light sources 10 in a first Lichtabstrahlrichtung I and indirect light using the second group of LED light sources 10 in a second Lichtabstrahlrichtung II.

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

The LED board may have preferential pitch elements that allow the LED board to be cut to length without interrupting the resource supply of the remaining LED light sources 10.

Further, the LED board for heat dissipation of the LED light sources may be formed and, for example, corresponding metallic heat removal channels or

Heatpipes or similar include. · «Μ ········ «· *« · · # «· * 7 φ φφ

Also, the use of thermal grease to improve heat dissipation may be provided for mounting the LED board.

The LED board is heat-conductively connected in this Ausfuhrungsbei game with a support member 20; The support member 20 is, as can be seen particularly simple in Figure 3, which shows an identical to Figures 1 and 2 embodiment, formed by a flat support plate having laterally arranged wings or fins.

The described, the optical element 15 facing support member 20 is thus formed by an elongated profile part, each having a central support area for the LED light sources 10 and corresponding LED boards and two side wings 21. It is particularly advantageous that the side wings 21 lie flat against the side parts 30 and outer walls of the housing.

The elongated outer walls or side parts 30 of the housing are connected to one another by the carrier element 20 for the LED light sources 10. In particular, the side parts 30 or outer walls designed as profile parts have guide slots which allow a tool-free connection of the carrier element 20 and the side parts 30 or outer walls. In this case, the wings 21, or fins of the carrier element 20 come into surface contact with the side parts 30 and the outer walls, so that a relatively large abutment surface is formed, in addition to a secure, torsionally rigid connection and the heat transfer from the support member 20 and the LED Light sources 10 to the outer walls or side panels 30 of the luminaire optimized. A separate heat sink for the LED light sources 10 can thus be omitted, which in turn allows a filigree luminaire design.

The outer walls or side parts 30 also have guide elements which enable a tool-free connection of the Lichtaustrementsements 33 with the side parts or outer walls 30 bn embodiment, the guide elements are formed by insertion slots for a flat, substantially transparent light exit element 33. The distance of the guide elements to the carrier element 20 is dimensioned such that the optical element 15 is fixed in a clamping manner between the light exit element 33 and the LED board or the carrier element 20.

* «Ίο:» ··· · «• # * ··!

In the exemplary embodiment shown, 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 flexibility.

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

For this purpose, the LED light sources 10 have a substantially square cross-section parallel to the areal extent of the optical element 15. The optical element 15 comprises a corresponding recesses, in which the LED light sources 10 engage in alignment, so that a rotational movement of the optical element 15 can be substantially suppressed. Particularly useful this can be realized with an unhoused variant of LED chips, which in turn have a low overall height, so that the dimensions of the lamp can be kept compact again in cross section.

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 in the optical element 15 substantially transparent in this embodiment.

In particular, the fact that 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.

Furthermore, in the exemplary embodiment, the luminaire has a further carrier element 20 for the second group of LED light sources 10. This is in turn realized as a flat support plate or profile part with side wings or fins 21, which can be connected without tools in the same way with the side parts or outer walls 30, and ensures a correspondingly excellent heat dissipation of the LED light sources 10. The second group of LED light sources 10 is in turn arranged on a substantially identical to the above-described LED board LED board in a row in the longitudinal extension of the lamp, again preferably unpackaged LED chips are used for reasons of height.

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 * * * · ·· * ··· ···· «ι v · ** · * # * # * * * * * ···· «» fl * * * 11 * * · »·· * 1 * 1 · · *

ν · M ♦ * Mf 1 · M extending in the longitudinal direction receiving space in which one or more operating devices 60 are arranged for the LED light sources 10.

This results in a particularly compact design of the luminaire whose width is not significantly different from the dimension of the optical element 15.

Particularly advantageously, the support elements 20 are arranged to limit the receiving space parallel to each other.

The operating devices 60 are arranged between the carrier elements 20 and the receiving space for the operating devices connects directly to an outer wall or side part 30 of the housing, or is also bounded by an outer wall or side part 30 of the housing. This opens up the possibility that operating devices 60 are in heat-conducting contact with the outer wall or are connected to the outer wall for heat dissipation. For example, the trained as a profile body side member 30 could also have brackets for control gear 60, or recordings for tool-free attachment of the operating devices. Preferably insertion rails could be provided, which allow a flat contact of the operating devices 60 with the outer wall 30, as is particularly clear for example from Figure 3. In particular, a plurality of fastening means of one of the operating devices 60 may face an outer wall or a side part 30 in order to form the planar contact. In the embodiment of FIGS. 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. In this case, the operating device comprises a plurality of pulse width control units, wherein at least one of the pulse width control units of the first and second group of LED light sources 10 is assigned, so that the first group of LED light sources 10, for example, independently in their light output from the second group of LED light sources 10th can be operated or controlled. In addition, in each case an imabhängige control and regulation of the light color of the first and second group of LED light sources 10 may be provided by means of the individual operating device 60 of this embodiment. Furthermore, it is also conceivable that the operating device 60 is designed for communication with a bus system in order to regulate or control the operation of the luminaire. · * ···· ···· »«

The second group of LED light sources 10 emits their light substantially in the second light emission direction II ah; in the illustrated pendant light so in the direction of a light carrier or a ceiling. For indirect light emission only the second group of LED light sources 10 is used in this embodiment; In the exemplary embodiment, the indirect light emission takes place via a substantially flat light exit element 33 which forms the cover side of the luminaire and can preferably be designed as a diffuser. For ambient lighting can then be advantageously provided that the light color of the indirect lighting differs from the light color of the direct lighting, which takes place in this embodiment exclusively on the first group of LED light sources 10.

Particularly advantageously, the style means of Ambientebeleuchtung be used when the dimensions and the light output of the lamp are tuned to architectural constraints, In the embodiment of Figures 1 to 3 is provided that the longitudinal extent of the lamp in partial modular design is customizable.

For this purpose, it may be provided that the optical element 15 does not extend over the entire longitudinal extent of the luminaire as provided in FIGS. 1 or 2, but rather several optical elements 15 associated with the LED light sources 10 are arranged consecutively in the longitudinal direction.

The optical elements 15 may preferably have identical dimensions, and so pretend a module length. However, also different dimensions of the optical elements 15 are conceivable, as can be seen for example from Figure 3, and in the spirit of the invention is also included beyond that a single optical element 15 extends over the entire longitudinal extent of the lamp.

By the construction described above, the housing, in particular the side parts 30, the light exit elements 33, and the support members 20 can be easily cut to a predetermined by the or the optical elements 15 length, so that, for example, in a suitable number of longitudinal extent of Luminaire consecutively arranged optical elements 15, the length of a table can be essentially reproduced and, for example, the length of the lamp in units between 1 cm and 50 cm, preferably between 5 cm and 20 cm can be adjusted. The optical elements 15 may have the dimensions mentioned in longitudinal extent. * > 3 *

In order to enable a particularly simple cutting, the side parts 30 are preferably made of aluminum and the light exit elements 33 are made of PMMA.

A particularly preferred further development can result from the fact that the luminaire housing or the carrier element 20 has space to add, for example, in the transverse direction, a further row of LED light sources 10. For example, each row of the LED light sources 10 may be arranged on a separate board.

Advantageously, one of the above-described plurality of optical elements 15 may be formed to be associated transversely with a first plurality of LED light sources 10 and longitudinally a second plurality of LED light sources 10, the first and second numbers of LEDs Light sources 10 differ. By turning 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.

For example, one of the plurality of optical elements 15 of the exemplary embodiment may be assigned to the LED light sources 10 in a grid of "2x3", ie 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 turning the optical element 15, in particular with the addition of a further row of LED light sources 10, now a grid of two LED light sources 10 in the longitudinal direction and three LEDs Light sources 10 is associated in the transverse direction of the optical element 15. The complete replacement of all optical elements 15 can thus be obsolete upon extension of the lamp, so that an acquisition of a few optical elements 15, the extension of the lamp, for example, a further series of LED light sources 10, modularly allowed.

The embodiment of Figure 3 shows only a plurality of optical elements 15, which have a mutually identical light emission and are formed by the above-described integrally connected lenses, so that a simple length variation results. However, it is also possible to provide optical elements 15 which have mutually different light emission.

Thus, for example, an accent lighting can be realized, which could particularly illuminate a seating area, for example in the case of a wall light. • 9 • 9 * * • • * «v ·« · »* '• iit« · · «Η:

As described above, in the exemplary embodiment of FIGS. 1 to 3, it is possible to fasten a plurality of the optical elements 15 between the carrier element 20 for the LED light sources 10 and the light exit element 33 without tools.

The attachment is provided in particular by clamping in the manner described above, so that thus the possibilities for changing the light output are drastically increased, the appearance and dimensions of the lamp are not changed thereby.

The embodiment shown in cross section of Figure 4 differs from the embodiment of Figures 1 to 3, characterized in that the support member 20 is connected to the first group of LED light sources 10 in one piece with the side panels 30 of the lamp. The structural unit of support element 20 and side parts 30 thus forms a heat sink for the LED light sources 10.

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

Moreover, 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 be further improved.

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

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

Claims (10)

Zumtobel Lighting GmbH P41605 / AT '· · · * · ** * «# tltrj · Claims 1. Luminaire with an elongate housing, a plurality of LED light sources (10) arranged in the housing, and at least part of the LED-5 light sources ( 10) associated lens, characterized in that those LED light sources (10), which is associated with a lens, are arranged in at least two parallel to each other and in the longitudinal direction of the housing extending rows, wherein each of a plurality of lenses to 10 a one-piece optical element ( 15), which extends in the transverse direction over several, preferably all rows of LED light sources (10). 2. Luminaire with an elongated housing and a plurality of LED light sources arranged in the housing 15, characterized in that a first group of the LED light sources (10) for emitting light in a first Lichtabstrahlrichtung (I) is arranged and formed and a second Group of the LED light sources (10) for emitting light in a second light emission direction (II), which is opposite to the first Lichtabstrahlrichtung (I), is arranged and formed, wherein the two groups of LED light sources (10) independently controllable are formed. 3, lamp according to claim 2, characterized in that carrier elements (20) for the two groups of LED light sources (10) define a longitudinally extending receiving space in which operating devices (60) for the LED light sources (10) are arranged. 30 4. Lamp according to one of the preceding claims, characterized in that the housing comprises two elongated outer walls or side parts (30), which are connected by a support member (20) for the LED light sources (10) 35 with each other. 5. Luminaire according to claim 4, characterized in that ···· fr * · * Ι * »·» »··» fr ·· »fr« »_ t t t · * · * | * * * * «16 **« one or more support elements (20) for the LED light sources (10) are formed by elongated profile parts, each having a central support area for the LED light sources (10) and corresponding LED boards and two lateral wings (21), wherein the side wings (21) lie flat against the side parts (30) of the housing. 6. Lamp according to one of claims 4 or 5, characterized in that both the outer walls or side parts (30) and the support element (20) for heat dissipation of the LED light sources (10) are formed. 7. Lamp according to one of the preceding claims, characterized in that a plurality of the LED light sources (10) associated optical elements (15) are arranged consecutively in the longitudinal direction, wherein the optical elements (15) preferably have identical dimensions. 8. Light according to one of the preceding claims, characterized in that a plurality of the LED light sources (10) associated optical elements (15) between the support member (20) for the LED light sources (10) and a light exit element (33) are fastened without tools , 9. Lamp according to claim 8, characterized in that the light exit element (33) fixes the optical elements (15) by clamping. 10. Lamp according to one of the preceding claims 8 or 9, characterized in that the light exit element (33) can be fastened without tools.