DE102008048909A1 - Luminaire with closed luminaire housing - Google Patents

Abstract

A luminaire has a luminaire housing which has a light exit opening. The light exit opening is closed by a light exit element. In the luminaire housing means for holding and power supply at least one elongated gas discharge lamp, in particular a fluorescent lamp are arranged. In the lamp, a partition wall is further provided, which thermally separates an area surrounding the cool spot of the lamp from the remaining interior of the lamp housing.

Description

The The present invention relates to a luminaire with a luminaire housing. The luminaire housing has a light exit opening which is closed by a transparent light exit element is. Next are in the luminaire housing means for mounting and power supply of at least one elongated gas discharge lamp, in particular a fluorescent lamp arranged.

The Operation of a fluorescent lamp conditionally that over the length of the lamp body across different Form temperature ranges. Due to the physical processes during lamp operation results in a defined Location where the lamp will be at its lowest during normal operation Temperature has. The aforementioned place is generally considered the cool spot referred to the lamp or cool spot.

Around Improve the operation of gas discharge lamps and make it optimal to be optimal during operation To achieve efficiency, the temperature of the lamps must be suitable be tempered. The temperature should be within a given range Range lie. The aforementioned operating temperature range or the operating point of the lamp is usually relatively tight tolerated. Further For gas discharge lamps, the cool spot is depending on the type of lamp arranged at a certain position. An optimized light output is then obtained when at the cool spot a preferred temperature is present at about 45 degrees Celsius. In so-called T16 lamps, their Wear names due to the fact that their tube has one Diameter of 16 mm, is the optimum temperature range at 40 to 44 ° C.

The The above-mentioned T16 lamps have, in contrast to the likewise known T26 lamps with a wider lamp diameter, different long supply lines to the lamp electrodes. This asymmetric design of a T16 lamp with regard to her Electrodes cause that with these lamps the Cool Spot comes to rest at the end, where the longer electrode lead is placed or at which the distance of the electrode to the front end the lamp is larger. In contrast, lies the cool spot with the symmetrically designed T26 lamps in the middle of the lamp. One consequence of this is that T16 lamps are more temperature sensitive are as T26 lamps.

From the EP 1 482 543 is a solution for the case known in fluorescent lamps - especially in the above-mentioned T16 lamps, which are used in air conditioning lights, ie in lights that have inlet or outlet openings in the lamp housing, which are connected to an air conditioner - a metallic shielding over to push the area of the cool spot. This avoids that the constantly existing draft allows these lamps to cool down, ie, that the cool spot has a temperature that is well below 40 ° C, so that the efficiency of the lamp is out of optimum.

In contrast, In particular, the present invention relates to such cases where the lamp is inside a closed lamp housing is arranged. Due to the lack of air circulation occurs here Often the problem is that inside the luminaire housing a temperature above the optimum cool spot temperature is present. Again, the efficiency of the lamp drops and so would it is desirable to lower the temperature at the cool spot a bit. When operating types of high performance falls Luminaire efficiency even decreases rapidly. The above points to one Saturation effect, which in turn influences on the life and aging can have.

Around to solve the present problem of overheating, could be in the sense of conventional designs First, try the whole lamp through outlet openings down with a flanged fan blower to cool. So that would also be the area captured the cool spot. Only the subtracted energy of the lamp is missing the light generation, so the efficiency continues to lag behind optimal solution remains.

Of the The present invention is therefore based on the object, the lamp to improve so that with her even at high ambient temperatures the Cool Spot in an optimal temperature range or operating point can be held and thus the result of the lamp optimized Can achieve luminous flux.

The The object is achieved by a luminaire according to the claim 1 and through a partition for use with a gas discharge lamp solved according to claim 15. advantageous Further developments are the subject of the dependent claims.

Accordingly, according to a first aspect, a luminaire is proposed with a luminaire housing which has a light exit opening, which is closed by a transparent light exit element, wherein in the luminaire housing means for holding and power supply at least one elongate gas discharge lamp, in particular a fluorescent lamp are arranged, characterized by at least one arranged in the luminaire housing partition, which thermally separates a region surrounding the cool spot of the lamp from the remaining interior of the lamp housing. It succeeds surprisingly by designing two rooms with different temperatures or different temperature levels, keeping the cool spot in the optimum temperature range.

To In a second aspect, the aforementioned luminaire has a cylindrical shape Partition, which around the oblong gas discharge lamp at the cool spot is arranged. It encloses the partition, in the interest of a good thermal separation or decoupling, with a small distance in the longitudinal direction of the lamp body. In this case, the partition in the longitudinal direction comprises a part the length of the tubular gas discharge lamp. Finally, the partition has at least one opening on. By the arrangement of the opening so an air exchange or a heat dissipation by thermal circulation.

To a third aspect, the partition is integral with the Luminaire housing or connected to the light exit element.

To In a fourth aspect, the luminaire housing is in thermal Communication with a flat heat sink located, a surface structuring, in the interest good heat dissipation, large convection surface, having an arrangement of cooling fins.

To In a fifth aspect, the material corresponds to the partition wall the material of the lamp housing and / or the light exit element.

To In a sixth aspect, those used for the partition wall Ingredients of a transparent material such as polymethyl methacrylate (PMMA), polycarbonate (PC), polyvinyl chloride (PVC), acrylonitrile-butadiene-styrene (ABS) or polytetrafluoroethylene (PTFE).

Besides becomes according to a seventh aspect, a lamp according to a claimed the above aspects, wherein the partition in one piece is and has a recess through which the tubular Gas discharge tube, for the sake of ease of assembly, can be carried out.

To an eighth aspect, the recess in the partition for a lamp a rubber seal or a fit on.

To In a ninth aspect, the partition wall has an upper portion and a lower section. The lower one overlaps Section the top section for the sake of easy assembly.

To a tenth aspect is the lower portion of the partition with the light exit element and / or the luminaire housing releasably connected. Between the lower and the upper section the partition are recesses arranged for the Passage of the fluorescent lamp are formed.

To An eleventh aspect is the dividing wall in the upper and lower Section is divided along a connecting line, which to a Limit line of the lower portion is spaced parallel. The connecting line runs through the center the longitudinal axis of the lamp. Next, the lower and the upper section has semicircular recesses, in the assembled state, a passage opening for the lamp. The recesses, starting from the center of the lamp's longitudinal axis, radial spaced from the outer circumference of the lamp.

To In a twelfth aspect, the partition wall has a transparent one or colored at least partially transparent plastic on with at least one ventilation hole.

To a thirteenth aspect, the partition wall at least one Side a partial or complete metal coating, in the interest of influencing the heat distribution and the radiation passage, on.

To In a fourteenth aspect, the partition wall is at least one Page a partial or complete surface structuring, For example, a surface profile with a rough or mirror-shining Surface, or a section with cooling fins on.

Besides According to a fifteenth aspect, a luminaire is proposed with a luminaire housing, which has a light exit opening which is closed by a transparent light exit element is, wherein in the luminaire housing means for mounting and power supply of at least one elongated gas discharge lamp, in particular a fluorescent lamp are arranged, characterized through an upper and a lower section, which is composed in Condition a passage opening for the gas discharge tube forms. It succeeds by the formation of two parts of a composite partition in a light also a special easy, safe and time-saving installation. In the Maintenance can be done by removing the lower section of the composite Partition the gas discharge lamp remain in the socket. Of the lower portion of the partition can with the light exit element be integrally or detachably connected. The upper Section can be pluggable mounted on the lamp housing.

at a first embodiment, wherein a T16 lamp For example, the Cool Spot is close by at the end of one of the two lamp holders. With the help of the invention Partition according to the above aspects will now be the end the lamp separated from the remaining area. Those in the remaining Area and at the light output resulting heat is now prevented from entering the surrounding area of the cool spot reach. So here is a lower temperature than in the remaining luminaire housing. The light output is improved. The luminous flux is optimized.

at a second embodiment, wherein a T26 lamp is used, the cool spot is in the middle of the Lamp. Here, with the help of the Cool Spot two partitions a central area of the remaining space the luminaire housing separated. Again, that is in the Areas or in the vicinity of the cool spot a low temperature before, which optimizes the luminous flux. Next result from the Above the advantages that the luminaire housing in Volume, in the interest of a flat design or low installation depth, can be reduced. At the same time, the lumens-per-watt ratio (Efficiency) of the lamp can be increased. Furthermore can with equal efficiency, the light even for a Higher ambient temperature can be used. Surprised So new areas of application can be developed, Fields of application that were previously of much more expensive and expensive to control Lights were dominated.

One third embodiment finally describes a variant where the end of the lamp with the cool spot is relatively closely surrounded by a sheath. With the help of two openings, on the one hand near or below the cool spot and on the other hand lie above the lamp filament, air circulation be created by the cooling of the Cool Spots sought becomes. Measurements are still going on, the desired result to improve. It can be both the location of the openings as well as their diameter in the sheath suitable to the respective Geometry of the luminaire housing, for example, taking into account a flow consideration, to be adjusted.

The Partition is preferably made of a transparent material, PMMA in particular, so that also over the space, the Cool spot assigned is a light emission can be done. The partition In this case, the light output of the luminaire influences only insignificantly. With appropriate structure appears to the viewer, who looks at the lamp from below through the light exit element, no change. As complementary measures can be provided, the partition in addition in particular with a reflective material Heat radiation to reflect. In addition, one can also Surface structuring be provided, which is the heat transport favored in one direction.

in the Framework of the carried out during the development Measurements compared to conventional solutions has been shown to be particularly the use of the partition too a significant temperature reduction in the cool spot area leads. Another temperature reduction can be achieved by the use of an additional Heat sink can be achieved. The cooling plate is lying then the lamp in the area of the cool spot and is thermally with coupled to the outside of the lamp.

The aforementioned Coupling in the case of a black anodized heat sink, made of aluminum or gray cast iron, smooth, with cooling fins or vertical cuts, for example, by a screw connection with wing nuts for easy hand assembly. With a thermal compound can be any thermal contact resistance or surface roughness are compensated. By the aforementioned conductivity improvement can be applied to a Post-processing of surfaces can be dispensed with. A later one Retrofitting or upgrading of the luminaire during use a more powerful lamp is also possible.

The Partition can be made in one piece with corresponding openings be formed for the lamps, in which case then a Thread the lamps before inserting them into the lamp socket can be done. In addition, the partition can also be designed in several parts with a first area already in the housing, or else arranged on the light exit element, in such a way that the lamps can be easily inserted into the sockets. The second part of the partition is then subsequently accordingly Put on the two areas of the housing from each other to separate.

following the invention with reference to the accompanying drawings closer be explained. The present embodiments are shown schematically in the figures. Same reference numbers in the individual figures designate the same or functionally identical or with respect to their functions corresponding elements. Show it:

1 a schematic side view of a lamp according to a first embodiment of the present invention with a T16 lamp;

2 a schematic side view of a lamp according to a second embodiment the present invention with a T26 lamp;

3 a schematic side view of a lamp according to a third embodiment of the present invention with a cylindrical arrangement in a T16 lamp;

4 a schematic side view of a lamp according to an alternative of the second embodiment of the present invention with a T16 lamp with a heat sink;

5 a schematic plan view of a partition wall with two parallel lights; and

6 a schematic plan view of a partition wall with lower and upper portion in two parallel lights.

In 1 is a lighting arrangement or luminaire 10 shown according to the first embodiment. The lamp has a cylinder-like elongated gas discharge lamp 1 on that in a luminaire housing 6 is housed.

The Luminaire housing is here for the sake of example double-walled sketched, but it can just as a honeycomb or wall-reinforcing Elements, webs or struts have. Another design can be displayed when the lamp to be carried heavy, the derived Power loss higher or the design in itself special Environmental conditions or vibration exposure is exposed.

In the above lamp 1 it is a so-called T16 lamp. The cool spot 12 is located on the left side of the lamp, in 1 indicated by a dot on the lamp socket. The cool spot may arise, for example, as a result of a standing wave or mode-shaped field distribution present in the cavity of the elongate gas discharge lamp or by the formation of a temperature distribution during the light emission. The luminaire housing 6 is down through a light exit element 5 completed, for example, a transparent plate made of one of the aforementioned plastics such as PMMA. The aforementioned plate may have a surface structure for equalizing and / or emitting the light in a certain angular range of the transmitted light.

In the luminaire housing is the lamp 1 with the lamp body 4 , the lamp filaments 2a and 2 B , Feeders 3a and 3b at the two ends of the lamp in the arranged on both end faces of the lamp holder 7 introduced. In the holder 7 that with the luminaire housing 6 is connected and what the connection between the lamp 1 and light housing 6 produces, a (not shown) corresponding version is arranged. In it, the power supply is accommodated via corresponding resiliently mounted snap-in or rotatable contact connections, so that mechanical vibrations or noise of the lamp fail to occur during operation.

In the luminaire housing is the partition for separation into two different temperature ranges 8th near the cool spot 12 arranged. This is in the case of a one-piece partition 58 , as in 5 shown a recess or bore 50 in a lamp body 54 arranged, for example, in the middle or in two lamps symmetrically to the center, such that the lamp can be pushed through with a game and thermally separates the room 1 with the temperature Temp 1 of the room 2 with the temperature Temp 2. A thermal separation means that a temperature difference between the two spaces is formed, so that the separated space 1 remains in the range of the optimum operating point at the cool spot, while the space 2, in which the most light and heat emission takes place, have a different temperature can.

So the partition can also have a further hole in the closed lamp the formation of a thermal flow field favors or for a certain flow resistance has a grid. For the opening comes next a matrix-like arrangement of small holes for generating a certain temperature difference even in the case of a metal For example, the use of a perforated plate in question. In addition, can also be flanged to a heat sink, or the Surface itself as a heat sink with one-sided Be structured ribs.

There at the lamp socket or at the front end of the lamp compared to the rest of the lamp length hardly any light or heat is generated, the partition may be relatively simple, where, for example, a metallization in question comes to the Irradiation from the warmer area of the lamp length to avoid the cool spot.

In 2 is a lamp 20 with T26 lamp 21 shown, according to the second embodiment, in which the cool spot 22 is formed in the middle. The lamp is over the brackets 7 with the luminaire housing 6 connected and has lamp filaments 2a . 2 B and feeders 23a and 23b in each case in the direction of the left and right ends or end faces of the lamp.

In contrast to 1 are, since the Cool spot located in the middle of the elongated gas discharge lamp, two partitions 28a and 28b intended. Through the aforementioned partitions two rooms 2 room with the temperature Temp 2 outside and a room 1 with the temperature Temp 1 are created within the partitions. The dividing walls can be provided with a rough surface structure or profiling, a vapor deposition or a heat-insulating layer or a multi-layered dividing wall in order to minimize radiation from portions of the gas discharge lamp located outside the space 1.

Further, in the recess for the passage of the tube, a seal made of rubber, or, for example, a transparent, heat and aging resistant silicone rubber may be arranged. Next, a passage at a relatively close distance in diameter to the lamp body 24 respectively. In 5 becomes the lamp body 54 relatively narrow of the recess 50 in the partition 58 enclosed, so for example at a distance of 1 or 2 mm. In addition, by choosing a larger distance on the favorable adjustment of the temperature difference influence can be taken.

In 3 is a lamp 30 , again with T16 lamp 1 shown, according to the third embodiment, in which a cylinder-like partition wall 38 is provided. Again the lamp is 1 over the brackets 7 with the luminaire housing 6 connected and has lamp filament 2a . 2 B as well as feeders 3a and 3b on.

In the cylinder-shaped partition 38 a can-like arrangement is preferably provided. In the case of the cylinder-shaped partition wall, the two end faces, such as the lid and the bottom of a can, surround the oblong gas discharge lamp 1 in the area of the Cool Spot 12 , In other words, in the present variant, the cool spot 12 So with lamp filament 2a packed in a cylinder closed in front and in the back. The cylinder is directly under the cool spot and above the helix 2a open. The cylinder-shaped partition 38 Thus, as indicated by arrows, which also take into account the flow of air through the cylinder and as in the 3 indicated, wall openings with an inlet 35 and an outlet 36 on.

Due to the increased temperature at the lamp filament 2a the surrounding air in the cylinder, ie in room 1 with the temperature Temp 1, rises rapidly and escapes through the hole in the cylinder, the outlet 36 , in the upper part of the luminaire housing, ie in the room 2. By the escape of air from the cylinder creates a negative pressure in the cylinder. The negative pressure in the cylinder sucks through the hole below the cool spot 12 , the inlet 35 , cooler air from the bottom of the lamp housing 6 in room 2. The aforementioned cooler air flows at the Cool Spot 12 over and cool it at the same time. This air was from the helix 2a reheated and rises. Thus, there is a cooling circuit, ie a thermal circulation, which is driven by the gas discharge lamp.

To flow through the cylinder-shaped partition wall 38 To assist, and thus additionally cool the area around the Cool Spot, two small fans, each at the inlet 35 and at the outlet 36 be arranged. The fans can increase the air flow with different and / or low speed for low noise, in order to keep the cool spot well-tempered, ie within the optimal operating range. It is also conceivable to equip the cylinder-shaped partition in the upper region with a heat sink-like surface structure with radially arranged cooling vanes on the outside.

The cylinder-shaped partition 38 can also with the one bracket 7 be thermally connected to dissipate the heat through the housing. Alternatively, the partition can also only over the lamp body 4 the lamp 1 be pushed. It can in the sense of 5 the side wall having a recess which may be sealed so that the gas discharge lamp can be performed with a clearance or a clearance fit.

For the material of the cylinder 38 For example, a plastic extrudate comes into question. In this case, the aforementioned is also conceivable to combine both two-piece, so provide a lower half-shell and an upper half-shell, which can then be joined together and then the cylinder 38 form.

there it is understood that the cylinder-shaped partition also a Peltier element near the cool spot may have, to make it suitable and determined or to cool down.

In 4 is, as a modification or addition to the second embodiment, a heat sink 44 with the luminaire housing 6 connected. Present was the T26 lamp 21 used with Cool Spot 22 in the middle and partitions 28a and 28b , The aforementioned partition walls or partition walls may consist of transparent and heat-insulating material. It goes without saying that a T16 lamp can also be used, then the arrangement of the heat sink shifts 44 to a front side of the lamp housing 6 corresponding. Further, the heat sink, here provided by way of example in a version with ramifications with a low thermal resistance of a few K / W, as it is used for power semiconductors, also integrally in be applied to the lamp housing. It turns out that the effect over a longer area already at a small tread depth causes a significant cooling effect, the color of the coating, the surface roughness and the depth structure also plays a role.

In 5 is a plan view of one-piece partition 58 represented with a recess 50 for the lamp and a lamp 54 , with the example of two lamps. The center points with the longitudinal axes of the two lamps are perpendicular to the plane of the drawing.

For a divider that is a transparent or at least in color partially transparent plastic, in addition to the usual Gradation of light transmission, which is constantly above the surface of the partition appears, but also a shading, a tint or a gradient in the partition or be provided along the partition.

In a modification of the partition starting from 5 , the partition can consist of two sections. For example, dividing the partition wall into upper and lower portions is along a line spaced parallel to the horizontal lower boundary line 58a the partition 58 in 5 , Preferably, the subdivision is parallel to a connecting line passing through the centers of the longitudinal axes of the two lamps (perpendicular through the plane of the drawing of FIG 5 ) runs. The recesses for the implementation of the lamps 54 are then starting from the aforementioned centers of the lamp longitudinal axis, for example, 1 to 5 mm spaced to make the lamp diameter.

alternative the aforementioned sections may also be separate or only one type of section is sufficient to make from which the upper or lower portion formed can be when subdivision by the connecting line of the centers the lamp's longitudinal axis runs (mirror symmetry).

therefore have the faces of the clashing sections there, where later the lamps pass through, starting from the centers of the lamp axis, semicircular Recesses on, in the assembled state, a passage opening form for the gas discharge lamp.

At the place where the sections meet can a seal may be provided. Here, the upper and / or the lower portion of the partition at the meeting end faces, optionally also in the area of the semicircular recesses close to the passage of the lamp, be sealed, for example by applying a transparent sealing layer on one of the faces.

Furthermore However, a seal can also be used in certain places or around the entire To be guided around the circumference of a section.

Farther Both the lower and upper sections of the dividing wall can be used also be in engagement, by a kind of rectangular toothing in the end faces, in which a fit can be formed. In this case, individual areas of the end faces reciprocal Recesses, which mesh with each other finger-like or each other.

Furthermore can be on and along the dividing line between the lower and the upper portion of the partition, a wave-like or wavy Function, such as a trapezoidal, triangular or sine function run. The partition then consists of two complementary Sections with wavy faces that joined together are.

in the Result, the partition can be put together that in the final Assembly step the opening a passage for the gas discharge lamps is present.

Further lends itself to the lower portion of the partition with the light exit element and / or the upper portion of the partition each with the lamp housing releasably connect or in one piece present to have.

Finally, in 6 another alternative embodiment for a partition 68 shown an upper section 62 and a lower section 66 exhibit. It forms in the assembled state of the upper section 62 with the lower section 66 For example, a hexagonal recess which forms a passage opening into which the gas discharge lamp 64 is introduced. For example, the upper section 62 already be connected to the lamp housing and the gas discharge lamp, without this as in the case at 5 to be guided through a one-piece partition already locked in the holder. During assembly, then the lower section 66 For example, in the upper section 62 releasably inserted, overlapped, frictionally engaged, positively connected, adhered or snapped. Also, the lower section 66 Also connected to the light exit element, which provides a receptacle or a pin-like connector. In the aforementioned case, then the lower section 66 the partition when inserting the light exit elements make the partition.

With The present invention thus becomes a simple and elegant Possibility created a well-tempered operation a gas discharge lamp, in particular a low-pressure discharge lamp to promote. In summary, the cool spot is the rest the lamp separated or sealed off. The temperature insulation by the partition according to the invention in the luminaire is so good that T16 lamps even at high ambient temperatures can be operated at optimum temperatures. In order to can reliability, and over the increased light output, the overall efficiency, improves the life and environmental compatibility become.

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - EP 1482543 [0005]

Claims (15)

Lamp ( 10 ; 20 ; 30 ) with a luminaire housing ( 6 ), which has a light exit opening which through a transparent light exit element ( 5 ) is closed, wherein in the luminaire housing means for mounting ( 7 ) and power supply at least one elongate gas discharge lamp ( 1 ; 21 ), in particular a fluorescent lamp are arranged, characterized by at least one in the lamp housing ( 6 ) arranged partition ( 8th ; 28a . 28b ; 58 ; 68 ), which is an area that the Cool Spot ( 12 ) the lamp ( 1 ; 21 ), of the remaining interior of the lamp housing ( 6 ) thermally separates. Luminaire according to claim 1, characterized in that a cylinder-shaped partition wall ( 38 ) around the oblong gas discharge lamp ( 1 ; 21 ) at the Cool Spot ( 12 ), wherein the partition wall ( 38 ) with a small distance in the longitudinal direction of the lamp body ( 4 ), and wherein the partition wall ( 38 ) in the longitudinal direction of a part of the length of the tubular gas discharge lamp ( 1 ; 21 ) and the partition wall ( 38 ) at least one opening ( 35 . 36 ) having. Luminaire according to claim 1 or 2, characterized in that the partition wall ( 8th ; 28a . 28b ; 38 ; 58 ; 68 ) is integrally connected to the lamp housing or the light exit element. Luminaire according to one of claims 1 to 3, characterized in that the luminaire housing ( 6 ) in thermal communication with a flat heat sink ( 44 ), which has a surface structuring with an arrangement of cooling fins. Luminaire according to one of the preceding claims, characterized in that the material of the partition ( 8th ; 28a . 28b ; 38 ; 58 ; 68 ) corresponds to the material of the lamp housing and / or the light exit element. Luminaire according to one of the preceding claims, characterized in that the partition wall ( 8th ; 28a . 28b ; 38 ; 58 ; 68 ) consists at least in part of a transparent material such as polymethyl methacrylate (PMMA), polycarbonate (PC), polyvinyl chloride (PVC), acrylonitrile-butadiene-styrene (ABS) or polytetrafluoroethylene (PTFE). Luminaire according to claim 1 to 6, characterized in that the partition wall ( 8th ; 28a . 28b ; 38 ; 58 ; 68 ) is integral and a recess ( 50 ) for carrying out a tubular gas discharge lamp ( 1 ; 21 ) having. Luminaire according to claim 7, characterized in that the recess ( 50 ) in the partition ( 8th ; 28a . 28b ; 38 ; 58 ; 68 ) has a seal made of rubber or a fit. Luminaire according to claim 7, characterized in that the partition ( 8th ; 28a . 28b ; 38 ; 58 ; 68 ) an upper section ( 62 ) and a separate lower section ( 66 ), the lower section ( 66 ) the upper section ( 62 ) overlaps. Luminaire according to claim 9, characterized in that the lower section ( 66 ) of the partition ( 68 ) with the light exit element ( 5 ) and / or the luminaire housing ( 6 ) is releasably connected and between the lower ( 66 ) and the upper ( 62 ) Section of the partition ( 68 ) in local recesses the implementation of the gas discharge lamp ( 64 ) is trained. Luminaire according to claim 10, characterized in that the partition ( 8th ; 28a . 28b ; 38 ; 58 ; 68 ) is subdivided into the upper and lower sections along a connecting line which leads to a boundary line of the lower section ( 58a ) is parallel spaced, and through the center of the longitudinal axis of the lamp ( 54 ), wherein the lower and the upper section have semicircular recesses, which in the assembled state, a passage opening ( 50 ) for the lamp. Luminaire according to claim 11, characterized in that the partition wall ( 8th ; 28a . 28b ; 38 ; 58 ; 68 ) has a transparent or colored at least partially transparent plastic with at least one vent hole. Luminaire according to claim 12, characterized in that that the partition on at least one side of a partial or has complete metal coating. Luminaire according to claim 13, characterized that the partition on at least one side of a partial or complete surface structuring or a Has section with cooling fins. Partition wall ( 8th ; 28a . 28b ; 38 ; 58 ; 68 ) for a lamp ( 10 ; 20 ; 30 ) with a luminaire housing ( 6 ), which has a light exit opening which through a transparent light exit element ( 5 ) is closed, wherein in the luminaire housing means for mounting ( 7 ) and power supply to at least one elongated gas discharge lamp ( 1 ; 21 ), in particular a fluorescent lamp are arranged, characterized by an upper ( 66 ) and a lower section ( 62 ), in the assembled state, a passage opening ( 50 ) for the gas discharge lamp ( 1 ; 21 ).