EP2171350A1

EP2171350A1 - Linear led lamp

Info

Publication number: EP2171350A1
Application number: EP08773700A
Authority: EP
Inventors: Harald Hofmann
Original assignee: Individual
Current assignee: Osram SBT GmbH
Priority date: 2007-06-27
Filing date: 2008-06-26
Publication date: 2010-04-07
Anticipated expiration: 2028-06-26
Also published as: DE112008001660A5; DE102007030186B4; WO2009000536A1; DE102007030186A1; EP2171350B1

Abstract

A lamp unit (10) with a reflector (12) and a light output region (16) is disclosed. A linear light source unit (30), comprising at least one LED light source (24) is arranged in the output region (16), at a distance to the front of the reflector wall, such that all the light flux is irradiated in the direction of the reflector wall and reflected from there to the light output region. The output region is sealed by a transmitting closure (18) such that an enclosed reflector chamber is formed. The reflector (12), the closure (18) and the light source unit (30) are permanently connected to each other to give the lamp unit (10).

Description

Iine LED lamp

The invention relates to a lamp unit and a light system with a Aufhah- me for the removable attachment of a lamp unit.

A lamp or lamp unit is understood to mean a product in which an electrical light source is connected to further electrical, optical and mechanical elements to form an inseparable unit. Such a lamp is always intended only as a whole for removable recording on a lamp.

In W02005 / 085706 an LED lamp is described with a base for connection to a luminaire and a domed rotationally symmetrical reflector, in the focal point for generating a directed light distribution, an LED source is arranged. The reflector opening forms a light exit plane of the lamp. The LED light source is arranged in the light exit plane. The light exit plane is closed by a transparent termination. A cooling block is arranged on the side facing away from the reflector of the LED light source and extends in the main emission direction, so that it protrudes from the light exit plane.

In FR 2 831 647 an automobile signal light is described. A reflector is formed by a housing having an inner reflective surface. The exit region of the reflector is closed by a transparent disc, wherein the disc and the housing are fastened by a clip connection. A mounting strip for LED modules is formed in the middle of the pane, which is plugged in and electrically contacted there. The LED modules are arranged in a row in the longitudinal direction of the signal light and aligned in the direction of the reflector.

It is an object of the invention to provide a lamp unit and a lighting system for this purpose, wherein a high light output and high light intensity can be achieved.

This object is achieved by a lamp unit according to claim 1 and a lighting system therefor according to claim 25. Dependent claims relate to advantageous Embodiments of the invention.

In the lamp unit according to the invention, a linear light source unit is provided, which differs from punctiform light sources, such as in W02005 / 085706, in that the light emission is distributed over a linear region. Such a linear light source unit with at least one LED light source can on the one hand be formed by a single LED element (eg LED chip) of linear shape, for example by an elongate OLED, but preferably a plurality of LED light sources are arranged in a row , When referred to hereinafter as a "longitudinal direction", this refers to the longitudinal direction of the linear light source unit.

The light source unit is arranged at a distance in front of the reflector wall of a reflector so that it emits light, preferably the entire light current in the direction of the reflector wall, from where the light is reflected to the light exit area. It is in contrast to conventional arrangements of light sources and reflectors, as they are, for example, commercially available as halogen reflector lamps, arranged in the light exit region. The main beam direction of the light source unit is thus preferably opposite to the main beam direction of the lamp unit. The reflector wall is preferably closed, d. H. in particular in the middle region, to which the main radiation direction of the LED light source unit is directed, without interruption. In this way, the most comprehensive possible reflection and thus efficient utilization of the generated light can be achieved.

While such a relative arrangement of LED light source and reflector is already known from W02005 / 085706, results in the inventive solution has the advantage that uses a significantly higher lamp power through the linear light source unit and thus a greater light output can be achieved. Namely, a large number of high-power LEDs can be arranged along the longitudinal direction.

Accordingly, the light intensity distribution of a lamp unit according to the invention, in contrast to known rotationally symmetrical lamps, preferably in the we- Shallow 2-axis symmetrical (ie both the longitudinal and the transverse axis) and can thus be used for a variety of lighting purposes, for example. Flooding, grazing light lighting etc. in areas such as facades, walls, floors, etc.

The reflector is preferably cylindrical, d. H. formed with in the longitudinal direction substantially the same cross-section. Most preferably, it has substantially the shape of a longitudinally halved hollow cylinder with a preferably symmetrical cross-sectional shape. The shape of the reflector surface is selected to achieve optical properties, for example as a parabola, ellipse, etc. In this case, the parabolic focal point or one of the ellipse focal points is preferably arranged at the location of the light source unit. The reflector wall is preferably curved, particularly preferably with constant curvature. Alternatively, however, it can also have, for example, prismatic shapes and other structures.

The exit area of the reflector is the area from which the light of the lamp unit exits. Preferably, the region is substantially planar, for example, as formed between parallel longitudinal edges of the reflector plane. The exit region is preferably rectangular, more preferably oblong, d. H. its extension in the longitudinal direction is greater, preferably substantially larger (for example more than 2 times, or even more than 5 times) than the extension in the transverse direction.

At the exit area a termination is provided, so that a closed reflector space is formed. The termination is transmissive to the passage of light and may, for example, be transparent or translucent. The termination of the reflector space is preferably complete so that the lamp as a whole is dust-tight and particularly preferably even airtight. When hermetically sealed, a gas filling, for example. Be provided with positive or negative pressure in the interior of the reflector space, if this is advantageous for the operation of the LED light source unit (eg. For cooling, electrical insulation, etc.).

The lamp can not be dismantled as a lamp unit and has no interior space

changing parts. The reflector, the termination and the light source unit are permanently connected to each other. The lamp unit is for interchangeable use in a luminaire in which it is always used as a complete unit and replaced as needed.

For the lamp unit according to the invention a number of developments of the invention are provided. Thus, the LED light source unit may have a common carrier for a number of linear, ie. H. Having in the longitudinal direction successively arranged LED light sources. Preferably, all LED light sources are arranged on a common carrier. The carrier preferably also includes electrical conductors for the electrical supply of the light sources. More preferably, it can have electrical components for the electrical supply and control of the LED light sources. The carrier may be formed as a board, wherein preferably a board material is to be selected, which has a good thermal conductivity for efficient heat distribution.

According to one embodiment of the invention, an electrical connection for the electrical supply of the LED light sources is provided on the outside of the lamp unit. The connection is preferably detachable, d. H. when installing the lamp in a lamp unit, the electrical connection can be easily made and easily removed when removing. Preferably, the electrical connection is provided as a plug connection, terminal connection or screw connection. Particularly preferred is an arrangement of the terminal on an end face of the reflector, d. H. at one of the ends of the lamp. In this case, a passage for the electrical contacting of the LED light source unit arranged in the interior is preferably provided on the front side.

Likewise, it is also preferable in mechanical terms to provide a releasable mechanical terminal for mounting in a luminaire. The mechanical connection and the electrical connection can be formed by a common element, as is known, for example, from the screw base of conventional incandescent lamps or plug-in sockets of commercially available halogen lamps. The mechanical termination preferably comprises a projecting connection tongue which, for example, can have a hole suitable for a screw, clamping or latching connection.

Particularly preferred electrical and mechanical connection are provided on at least one end face of the reflector. For this purpose, there is a closure plate with a be provided mechanical connection and an electrical connection. The end plate is preferably also permanently connected to the rest of the lamp unit. It can be provided that in each case a mechanical connection, for example. In the form of a connection tongue is provided at both ends of the reflector, but only on one side of an electrical connection.

According to a development of the invention, slats are provided for influencing the light distribution in the longitudinal plane, which are arranged transversely to the longitudinal direction of the light source unit. With the help of the lamellae control or determination of the light emission angle in the lamp longitudinal direction is possible. The lamellae can be designed as simple, flat lamellae or else as more complex curved shapes.

On the one hand, an arrangement of fins at the exit area is possible. The lamellae can parallel to each other, for example. Within the unit, d. H. be arranged behind the conclusion. Likewise, they may be on the outside of the unit, i. H. before the

Conclusion to be integrated. Alternatively, an integration of lamellar, opaque or reflective separations in the termination is possible.

Alternatively or additionally, it is also possible to arrange the lamellae on the light source unit. If the light source unit comprises a plurality of light sources, the lamellae can be arranged between them. In this way, an alignment of the radiation is already possible at the place of light generation. It is particularly preferred here that the lamellae arranged between the light sources are formed with a reflective surface. Thus, a determination of the light exit angle in the longitudinal planes can still be achieved with high efficiency and at the same time optimum utilization of the light generated by the light source unit.

Other developments of the invention relate to influencing the light distribution by an optical element at the exit region. Thus, a flat, transmissive optical element with a structured, ie not completely planar surface can be provided for deflecting the light reflecting from the reflector. As a result, the light distribution in the transverse plane is preferably influenced in addition to the distribution achieved by the reflector contour. The optical element can in this case, for example, the Increase radiation angle of the light. Particularly preferably, the lamp termination directly forms the optical element, ie no separate optical element is provided, but the termination is formed by the optical element, or the transmissive termination has a desired optical function. It is possible to form the optical element as a linear profile, so that the element has, for example, a constant cross-section in the longitudinal direction. For example. For example, the element may be provided with a prismatic structure for obtaining a broadened emission.

In one embodiment of the invention, the reflector is shaped so that the light of the light source unit is focused in a focal point at a distance in front of the light exit area. Such a bundling can be achieved by a reflector with elliptical contour, in which the light source unit is arranged in the first focal point, so that the light is focused in the second focal point at a distance in front of the light exit area. The light distribution achieved in this way is of particular interest for a multiplicity of possible uses, since in the second focal axis the entire luminous flux of the lamp is concentrated in a linear region. If, for example, a narrow slot is arranged in this focal plane, the lamp radiates essentially all the light through this narrow slot. As a result, on the one hand the lamp is not visible from the opposite side, which allows extremely interesting turns in the lighting. In technical terms, this provides the advantage that the light of the lamp is provided in the focal plane, but due to the distance, the heat generated by electrical power loss in the light generation is not effective there.

Other developments of the invention relate to the cooling of the light source unit. Such cooling is needed for LED light sources to operate in a low-cost work area. For this purpose, a heat sink is preferably provided on the LED element. Such a heat sink consists, for example, of a good heat-conducting material, for example. Metal, preferably aluminum. The surface of the heat sink is preferably enlarged, for example by lamellae and / or structured surface. Of the

Heat sink expedient, as well as the LED light source unit, elongated shape. It is to be installed as closely as possible directly to the LED light source elements or to their support with the best possible heat transfer. It is particularly preferred that the heat sink protrudes from the lamp unit so as to allow effective dissipation of heat into the environment. For this purpose it can be provided that the heat sink projects from the exit area, preferably in the direction of the light emission. If the heat sink is of essentially the same width as the carrier of the light source unit, this does not result in any additional shading. The heat sink can be accessible from the outside, for example. Be designed as a handle. Preferably, it has a profile shape over the length of the same cross-section.

For effective cooling, a cooling medium can be provided. For this purpose, the heat sink may have a cavity for receiving the cooling medium. The cooling medium is preferably fluid, d. H. liquid or gaseous. The cavity within the heat sink can be completed, whereby a heat transfer on the heat pipe principle by evaporation of the cooling medium hottest and precipitation is achieved at the coldest point. Alternatively, the cavity can also be flowed through. For this purpose, the heat sink may have at least one of the end faces a connection for the cooling medium. When installed in a corresponding lamp, the terminal can be coupled to a feeding device of the lamp, so that an effective cooling is made possible in particular by flowing through the heat sink in the longitudinal direction.

The attachment of the heat sink is preferably carried out in the outlet region at the conclusion. Here it can be provided that the conclusion leaves free a longitudinally extending gap in which the designed as a profile heat sink is arranged.

In the described arrangement of the light source unit at the exit region with

For example, in the case of a parabolic or ellipsoidal reflector, the surface of which is essentially perpendicular to the main emission direction of the LED light source element in the middle region, the main emission direction in the direction of the reflector results in a certain shadowing of the light emission. This shading can be minimized so that it is acceptable for many applications with a suitable (namely relatively broad) radiation of the LED light source element and a suitable narrow shape thereof. However, in order to achieve a better utilization of the light emitted directly in the main emission direction, it can be provided that the reflector surfaces in the region directly opposite to the light source unit, has a shape having a central elevation, so that light incident from the light source unit is reflected in a direction past the light source unit. In the case of a reflector with a symmetrical cross section, this is, for example, the middle region in the symmetry plane on which the central optical axis of the light source unit points. Here, in the remaining area as described, for example. Parabolically shaped reflector having a different shape with a middle elevation, for example. An involute.

A described lamp unit is preferably of a handy size, so that it can easily be manually inserted into corresponding lighting units. Further preferred are sizes such as are common for conventional lamps of conventional type. Thus, for example, the outlet region may have a length of 5-150 cm, preferably 10-60 cm. The exit area may also have a width of 2.5-20 cm, preferably about 5-10 cm.

In a luminaire system according to the invention according to claim 25, a lamp unit can be used as described above. A corresponding lamp comprises a housing and an electrical connection and a receptacle for the replaceable attachment of the lamp unit. The recording allows a mechanical fixation and electrical contacting of the lamp unit. A corresponding mechanical connection is connected to a suitable terminal of the lamp unit. Likewise, a corresponding electrical contact is connected to the contact terminal of the lamp unit.

A corresponding lamp is provided in contrast to the pure lamp unit to the fact that the actual light-generating element - namely the lamp unit - is changeable therein. Next, the lamp additional components, such as, electrical supply and control devices, u. a. for connection to a mains voltage. Next switching elements, dimmers, etc. may be provided on the lamp.

In a particular embodiment, an ellipse-shaped reflector lamp described above is used. Here, the lamp has a slot-shaped light exit area on, which lies in the second focal axis of the lamp. In this way, the housing of the lamp almost completely - namely except for the slit-shaped, preferably particularly narrow light exit area - be closed, yet the full luminous flux can be radiated to the outside.

Hereinafter, embodiments of the invention will be described in more detail with reference to drawings. In the drawings show:

1a, 1b are perspective views of an embodiment of a lamp unit; Fig. 2 side view, front view and top view of the lamp unit of Fig. Ia, ib;

Fig- _3> 3 ^a cross-sectional view of plane A of the lamp of Figure 2 as assembled unit and in an exploded view.

Fig. 4 is a longitudinal sectional view of the plane C of the lamp of Fig. 2; Fig. 5 is an exploded perspective view of the end face of the lamp unit of Fig. Ia, lb;

6 is a perspective view of a first embodiment of a

End plate of the lamp unit of Fig. 5;

Fig. 7 is a longitudinal sectional view of the plane B of Fig. 2; Fig. 8 is a rear elevational view of the lamp of Figs. 1a, 1b;

9a is a perspective view of a second embodiment of a

End plate;

FIG. 9b is a cross-sectional view of the plane C of FIG. 2 with the end plate of FIG. 9a; FIG. 10a is a perspective view of a third embodiment of a

End plate;

FIG. 10b is a longitudinal sectional view of the plane B of FIG. 2 with the end plate of FIG. 10a; FIG.

11a shows a cross-sectional view (plane A) of a first embodiment of a reflector form as a parabolic reflector;

Fig. 11b as a light distribution curve, an intensity distribution of the radiation of

Lamp of Fig. 11a;

Fig. 12a in cross-sectional view (plane A), a second embodiment of a Reflector shape as an ellipse with focus planes Fi and F2;

12b shows a perspective cross-sectional view of an arrangement of a lamp from FIG. 12a in front of a slot-shaped light exit region;

13 shows a partial cross-sectional view (plane A) and longitudinal sectional view (plane C) of an embodiment of a lamp with lamellae at the outlet region;

Fig. 14 in partial cross-sectional view (plane A) an embodiment of a

Lamp with louvers on the light source unit;

15, 16 in a partial longitudinal sectional view (plane B) embodiments of lamellae between the LED light sources;

17a, 17b cross-sectional view, top view of a closure plate and light distribution curve of a lamp with a first embodiment of a transmitting termination;

FIGS. 18 a, 18 b are cross-sectional views, a plan view of a termination plate, and a light distribution curve of a lamp with a second embodiment of a transmitting termination;

19a, 19b are cross-sectional views, a plan view of a termination plate and light distribution curve of a lamp with a third embodiment of a transmitting termination; Fig. 20a in cross-sectional view of a lamp with one in a partial area as

Involute shape formed reflector;

Fig. 20b is an enlarged view of the involute portion of Fig. 20a;

Fig. 21a in cross-sectional view another embodiment of a lamp with a quarter-circle-shaped reflector; Fig. 21b is a light distribution curve of the lamp of Fig. 21a and

FIG. 22 is a schematic longitudinal sectional view of a luminaire with a lamp according to FIG. 1 a, b.

In Fig. Ia, lb, 2, a lamp 10 is shown in various views. The lamp has a cylindrical reflector 12 made of glass, which is closed at both end sides by end plates 12. Alternatively, the reflector may also be made of other materials, for example plastic or metal. The reflector 12 has a symmetrical cross-section, with the curved side towards the back of the lamp is aligned. The shape of the curvature, as explained below, for example, be parabolic or elliptical. The figures show the reflector shape in this regard only schematically. On the front side of the reflector 12, a rectangular light exit region 16 is formed between its longitudinal edges, which is closed by a transparent glass pane 18. Alternatively, the termination 18 may be formed by another material, such as plastic, as long as it is light transmissive.

Over the length of the lamp 10 extends at the bottom of a heat sink 20. The heat sink 20 protrudes at the light exit region 16 in the light exit direction. It is designed as a profile body with several parallel slats made of good heat conducting material, aluminum in the example shown.

The lamp 10 is designed as a linear lamp with an elongate light exit area. In the example shown, the width of the light exit area is about 5 cm. The length is relatively short in the example shown for illustrative reasons. For such lamps lengths of 10, 30, 60 and 100 cm (light exit area) are sought.

In Fig. 3-5 details from the interior of the lamp 10 can be seen. The reflector 12 has on the inner side a highly reflective reflector surface 13. In the light exit plane 16, a LED light source unit 30 is mounted directly on the heat sink 20 in a slot 21 of the lens 18. The light source unit 30 is formed as a printed circuit board 26 with high power LEDs 24 mounted thereon. On the circuit board 26 traces for electrical connection of the LEDs 24 are provided.

The electrical supply takes place from a front end of the lamp 10 ago. On one of the end plates 14, a screw terminal block 27 is provided, the electrical contacts with a passage (not shown) provided by the end plate 14 and is connected to the circuit board 26.

At Schraubklemmblock 27, as shown in Fig. 7, 8, connecting cable 52 are connected for electrical contacting. As further illustrated in FIGS. 6-8, the end plate 14 has a connection tongue 34 for the mechanical connection of the lamp 10. The terminal tongue 34 is formed as protruding from the end face of the lamp 10 flat metal tab with a fixing hole. As shown in FIG. 22, the lamp 10 can be exchangeably received in a luminaire 100 by connecting an electrical control and operating device 102 to the terminal block 27 and connecting the terminal tongues 34 on both end sides with corresponding receptacles on a luminaire housing 104 be, for example by a screw. In this way, the lamp 10 is mechanically attached to the lamp 100 and electrically contacted, so that from the control and operating device 102, which is connected to a mains voltage supply, a suitable for the operation of the lamp 10 voltage is supplied and the lamp 10 to this Way can be controlled.

In Fig. 9a, 9b, a second and in Fig. 10a, 10b, a third embodiment of a closure plate is shown. In the second embodiment according to FIGS. 9a, 9b, the connection tongue 34 is likewise formed horizontally in the longitudinal direction of the lamp, but at the rear side of the reflector. In the third embodiment, the terminal tongue 34 is perpendicular, provided parallel to the end plate.

As shown in FIGS. 11 a, 11 b (for symmetry reasons only for one half of the reflector), the LED 24 emits light onto the reflector 12. The entire luminous flux is reflected by the reflector wall 13. At the reflector wall 13, the light is reflected in the main emission direction of the lamp 10, d. H. in the opposite direction of the radiation of the LED 24. The very close to the apex of the reflector incident luminous flux is reflected back to the LED 24 and its board 26, so that it comes in this area to a certain shade. Due to the narrow shape of the board 26, the overall shading effect remains relatively low. Later, in the context of FIGS. 20a, 20b, a possibility is discussed of how the shading is further reduced.

In the variant shown in Fig. 11a, 11b, the reflector wall 13 is of parabolic shape. The LED 24 is arranged in the focal point, so that light emitted there is reflected substantially in parallel and through the lens 18 in essentially passes through in parallel. As shown in Fig. 11b, the result is a very narrow light distribution curve with maximum light intensity in the A plane.

In the variant according to FIG. 12a, the shape of the reflector surface 13 is an elliptical shape with two focal plane planes Fi and F2. In the upper focal plane Fi the LED elements 24 are arranged. The light emitted from there is focused in the second focal plane F2 arranged at a distance in front of the light exit region 16.

This can be exploited as shown in Fig. 12b to radiate the entire luminous flux of the lamp 10 with elliptical reflector through a narrow slot-shaped opening 36 therethrough. Such a slot-shaped opening 36 may, for example, be provided on a luminaire, so that the luminaire is almost completely closed except for the slot 36.

In the embodiment of a lamp according to the partial view in Fig. 13 is for controlling or fixing the light emission angle in the lamp longitudinal direction (B-plane) provided that at the outlet region 16 of the reflector 12 fins 40 are arranged. The lamellae 40 are formed in the example shown as a flat diaphragm, which are arranged parallel to the emission direction of the reflector 12. They have a certain height in the light emission direction, with which the beam angle is defined in the longitudinal direction.

In an alternative embodiment according to FIGS. 14-16, 24 lamellae 42 are arranged on the circuit board 26 between the individual LED elements. These lamellae serve to limit the width of the light distribution in the longitudinal direction. Depending on the height, the distribution can be set as narrow as desired. The fins 42 may be opaque. Particularly preferred is a reflective surface of the fins 42, in particular in conjunction with a curved cross-sectional shape of the fins 42 as shown in Fig. 16. Since the fins 42 are arranged between the LED elements 24, despite the associated limitation of the width of the radiation, an almost complete utilization of the emitted light can be achieved. The radiation characteristic of a lamp as described above, can - in addition to the described variation of the shape of the reflector 12 - also influenced by the arrangement of corresponding optical elements in the light exit plane 16. Here, transmitting optical elements can be introduced in order to achieve a desired light distribution - bundling, widening, scattering, etc. The optical elements may be provided as a separate unit, but more preferably they are provided in the lamp termination 18 itself. Thus, the surface of the lens 18 according to a first embodiment (FIGS. 17a, 17b) may have a structure with round elevations. As the light distribution curve shows, this makes the broadcast wider than with the mere use of a parabolic reflector.

A further optical effect can be achieved by the use of a prism structure according to the second embodiment (FIGS. 18a, 18b). The prismatic structure of the lens 18 leads to a deflection of the perpendicularly incident rays on both sides, so that the relatively wide light distribution curve shown in Fig. 18b is formed.

Finally, as indicated in the third embodiment (FIGS. 19a, 19b), the lens 18 also diffuses the light diffusely, so that a diffuse light distribution curve (FIG. 19b) results.

20a, 20b, a possible measure is described with which a shading of the light reflected by the reflector 12 on the board 26 can be reduced. In the example shown, the area of the reflector surface 13, which is decisive for such a shadowed reflection, is the middle region 15. In order to avoid shading, the reflector surface 13, which in the remaining region is parabolic in shape, as described above, for example, is parabolic. procured differently at this point. As can be seen in the enlargement of Fig. 20b, an involute shape having a central tip 19 is formed. As a result, rays emanating from the LED 24, no longer as in a parabolic shape substantially perpendicular, ie reflected without angle change, but they are reflected by the side edges of the elevation 19 to the side and thus no longer meet the board 26th While symmetrical reflector cross-sections have always been discussed in the foregoing description, the embodiment of Figs. 21a, 21b shows an alternative in which the reflector 12 has only a cross-sectional area substantially equal to halving a symmetrical reflector shape (of course, as desired Properties, for example with a parabolic or even free-plane course of the reflector surface 13). Laterally, the completed reflector space is completed by a flat mirror surface 46. As FIG. 21b shows, the corresponding light intensity distribution is asymmetrical. The entire luminous flux of the LED light source passes through an approximately half the size of the lamp termination as in the previously described embodiments.

Claims

claims

A lamp unit having a reflector (12) with a reflector wall, whose boundary defines an exit area (16), and a linear light source unit (30) with at least one LED light source (24) in the exit area (16) at a distance from the reflector wall is arranged so that it emits light in the direction of the reflector wall, wherein the outlet region (16) by a transmitting termination (18) is closed, so that a closed reflector space is formed, wherein the reflector (12), the termination (18) and the light source unit (26) are permanently connected to each other.

2. A unit according to claim 1, wherein the light source unit (30) comprises a plurality of LED light sources (24), wherein the LED light sources (24) are arranged one behind the other in the longitudinal direction.

3. Unit according to claim 2, wherein the LED light sources (24) are arranged on a common carrier (26) with conductors for electrical supply.

4. Unit according to one of the preceding claims, in which - on the outside of the unit (10) a detachable electrical connection (27) for supplying electrical power to the light source unit (30) is provided.

5. Unit according to claim 4, wherein the electrical connection is provided as a plug connection, terminal connection or screw connection.

6. Unit according to one of claims 4, 5, wherein the electrical connection is provided on an end face of the reflector (12). - YY -

A unit according to any one of the preceding claims, wherein a releasable mechanical terminal (34) of the unit (10) is provided for attachment to a luminaire (100).

8. A unit according to claim 7, wherein the mechanical connection comprises a projecting end tongue (34).

9. Unit according to one of the preceding claims, in which - at least one end face of the reflector (12) is provided a closure plate (14) with a mechanical connection (34) and an electrical connection (26).

A unit according to any one of the preceding claims, wherein - a number arranged transversely to the longitudinal direction of the light source unit (30)

Slats (40, 42) is provided.

11. Unit according to claim 10, wherein

Lamellae (40) at the outlet region (16) are arranged.

12. Unit according to claim 9 or 10, wherein

Slats (42) on the light source unit (30) between the light sources (24) are arranged.

13. Unit according to one of the preceding claims, wherein at the outlet region (16) at least one flat, transparent optical element for deflecting light reflected by the reflector (12) is provided.

14. A unit according to claim 13, wherein - the optical element (18) has a textured surface which deflects the light so as to increase the angle of emission of the light.

15. Unit according to claim 13 or 14, wherein the optical element has a longitudinally constant cross section.

A unit according to any one of the preceding claims, wherein the light from the light source unit (30) is focused in a focal axis (F2) spaced from the exit region (16).

17. Unit according to one of the preceding claims, in which a heat sink (20) is provided on the light source unit (30).

18. Unit according to claim 17, wherein the heat sink (20) from the outlet region (16) protrudes.

19. Unit according to claim 17 or 18, wherein the heat sink has at least one cavity for receiving a cooling medium up.

20. Unit according to one of claims 17-19, wherein the cooling body has at least one end face a connection for the cooling medium.

21. Unit according to one of claims 17-20, wherein the conclusion (18) leaves free a longitudinally extending gap (21) in which the profile formed as a cooling body (20) is arranged.

22. Unit according to one of the preceding claims, wherein the reflector (12) in a partial area (15) has a cross-sectional shape with a central elevation (19), so that of the light source unit (30) incident light at the partial area in one direction the light source unit (30) is reflected past.

23. A unit according to claim 22, wherein the portion (15) has an involute shape. - I ₉ -

24. Unit according to one of the preceding claims, wherein the outlet region (16) has a length of 5-100 cm, preferably 10-60 cm and a width of 2.5-20 cm, preferably 5-10 cm.

25. Lighting system comprising a lamp (100) having a housing and an electrical connection, and a receptacle in which a lamp unit (10) is accommodated replaceable according to one of the preceding claims, wherein the receptacle comprises a mechanical connection, which with a mechanical connection the lamp unit (34) is connected, and an electrical contact, which is connected to an electrical contact (26) of the lamp unit (10).

26. The system of claim 25, wherein - the lamp (100) an electrical operating and / or control device (102) for supplying a suitable for the operation of the LED light source unit (30) voltage or a suitable current at the electrical contact (26).

27. The system of claim 25 or 26, wherein - the lamp (10) has a slot-shaped light exit region, and the lamp (10) is formed so that the light of the light source unit (26) in a focal axis (F2) at a distance from the exit region (16) is focused, wherein the focal axis (F2) at the slot-shaped light exit region of the lamp (100) is arranged.