DE202011005029U1 - Flat profile luminaire with an indirect light component and a strongly increased proportion of direct light - Google Patents

Abstract

Luminaire with a frame-shaped flat profile housing (1) symmetrical to a longitudinal axis (A) with two opposite longitudinal profiles (11a, 11b), whereby a. a light exit field (16b) on an underside (13b) for emitting a direct light component (6) and a light exit field (16a) on an upper side (13a) for emitting an indirect light component (7) is limited, b. A light unit (20, 30) with a primary reflector (81, 82) behind it, symmetrical to a transverse axis (E) of the flat profile light (1), is arranged opposite each other in the longitudinal profiles (11a, 11b) in such a way that they enter a light scattering interior (15) radiate in between the longitudinal profiles (11a, 11b), the light exit field (16b) for the direct light portion (7) on the underside (13b) and the light exit field (16a) for the indirect light portion (7) on the top side (13a), and c. To increase the direct light component (7) in the light scattering interior (15), a central secondary reflector (9) is arranged in the area of the longitudinal axis (A) in the light exit field (16a) for the indirect light component (6) on the top (13a) that a part ( 7a2) of the light radiated in laterally by the light units (20, 30) and symmetrical primary reflectors (81, 82) is deflected in the direction of the light exit field (16b) for the direct light portion (7) on the underside (13b).

Description

The invention relates to a lamp with a symmetrical to a longitudinal axis, frame-shaped flat profile housing with two opposite longitudinal profiles, whereby a light emission field is limited to a bottom for emitting a direct light component and a light exit field on a top for emitting an Indirektlichtanteils.

Luminaires of this kind can z. B. as pendant lights, pendant lights, recessed lights in z. B. suspended ceilings u. v. m. be used. These not only have the task, a z. B. to illuminate a workplace or path area serving and often downwardly directed Nutzlichtanteil as possible to produce glare-free. Rather, it is desirable to derive even small amounts of indirect light in other directions. These are used as scattered light components for the diffuse illumination of surrounding areas of space, such. As of ceilings, walls, construction parts such as roof trusses, wooden beams, stairs, u. v. m ..

Such a diffuse ambient irradiation has the advantage that strong lighting contrasts between z. B. a desk surface and a surrounding office space can be avoided. Thus, lighting systems are used, which emit in addition to a direct proportion of light and an indirect proportion of scattered light. Hereby, the space surrounding a workstation, especially a ceiling spanning the room, can be dimly lit with an at least diffused scattered light and thus the spatial depth can be made visible.

A lamp of this type is z. B. from the DE 103 35 784 A1 known. This light has a reflector for directing light, which is assigned to the at least one light source and predominantly directs light emitted by it upwards. In this case, the at least one reflector extends from below the at least one luminous means inclined at an angle obliquely upward and the luminaire center to next to the at least one light source. As a result, the majority of the light emitted by the lamp is radiated upward to the ceiling. A luminaire of this type thus has a high Indirektlichtanteil and a correspondingly reduced direct light component. In order to obtain a usable direct light component, such a luminaire must often be equipped with powerful light sources.

In order to obtain a larger proportion of direct light in a lamp of this type is in the DE 20 2009 014 258 U1 proposed that the central region of the lamp housing is covered on the upper side at least partially by an opaque cover. However, this embodiment has the disadvantage that the cover is placed on the outside of the housing. There is thus no compact, z. B. easy to clean, luminaire housing more. In addition, the danger is seen that the homogeneity of the downwardly radiated direct light component is impaired by simple, plate-shaped covers.

Another lamp of this kind is z. B. from the utility model DE 20 2009 010 018.9 known. This has to increase the direct, in particular downwardly radiated light component a beam splitter with an approximately in the middle along the longitudinal axis parallel to the light units extending longitudinal zone with increased reflectivity at reduced light transmission and on both sides to each a longitudinal zone with reduced reflectivity at increased light transmission.

The object of the invention is to provide a further improved luminaire which has a direct light component which is increased relative to the indirect light component.

The object of the invention is achieved with the features of the luminaire specified in claim 1. Advantageous further embodiments of the invention are specified in the subclaims.

According to the invention, to increase the proportion of direct light in the light scattering interior, a central secondary reflector is arranged in the area of the longitudinal axis in the light exit field for the indirect light portion on the upper side such that a portion of the light radiated laterally by the light units and symmetrical primary reflectors towards the light exit field for the direct light portion at the bottom is diverted.

The invention not only offers the advantage that a better redistribution of indirect light components into direct light components is possible inside the luminaire. Rather, this redistribution takes place with the help of the central secondary reflector in a particularly glare-free and effective manner. Depending on the version is thus u. U. even possible to use without noticeable loss of luminance in the direct light share bulbs, which have a reduced electrical power consumption. Thus, with the aid of the invention as a body of conventional 80 W fluorescent lamps u. U. also fluorescent lamps with only 49 W or 35 W electrical power can be used. Due to these advantageous properties u. U. also based on other principles bulbs, z. B. band-shaped light-emitting diodes, are used.

The lamp according to the invention can without affecting the above Properties both freely suspended z. B. as a pendant light, freestanding z. B. as a floor lamp as well as installed, for. B. as a recessed light in a suspended ceiling, be executed.

The invention and advantageous embodiments thereof will be explained in more detail with reference to the figures briefly mentioned below. Show

1 a plan view of a flat profile lamp according to the invention,

2 4 shows a lateral section through a preferred exemplary embodiment of the flat profiled luminaire according to the invention with exemplary beam paths for illustrating the principle of irradiation, distribution, scattering and decoupling of light components,

3 a side detail D through the flat profile of 2 in the area of the upper beam splitter disk with exemplary beam paths for illustrating the irradiation, distribution, scattering and decoupling of light components,

4 a side detail C through the flat profile of 2 in the area of the lower diffuser disk with exemplary beam paths for illustrating the irradiation, distribution, scattering and decoupling of light components,

5 a detail in plan view of the bottom at one end of the flat profile light, and

6 a detail in plan view of the top at one end of the flat profile light,

1 shows a plan view of an advantageous embodiment of a flat profile lamp according to the invention, and 2 a corresponding lateral cross-sectional view along a section line B.

The lamp has a frame-shaped flat profile housing 1 from a first and second longitudinal profile 11a . 11b on, which are arranged opposite and preferably designed U-shaped. The front sides of the flat profile housing 1 are over a first and second U-shaped cross section 12a . 12b closed, which preferably one with the longitudinal profiles 11a . 11b have identical cross-sectional shape and matching dimensions. The longitudinal and transverse profiles are preferably connected at the corners of the housing via mitres. The housing is symmetrical with respect to a longitudinal axis A and bounded on an upper side 13a a light exit field 16a and at a bottom 13b a light exit field 16b , How special from the cross-sectional view of 2 is apparent, are a first, second light unit 20 . 30 lying in the preferred U-shaped longitudinal profiles 11a . 11b inserted and radiate substantially laterally in one of the frame-shaped flat profile housing 1 limited light scattering interior 15 one.

According to a particularly advantageous and in the 1 to 6 already shown embodiment are in the light exit field 16a at the top 13a a beam splitter disk 40 and in the light exit field 16b on the bottom 13b a diffuser disk 50 inserted. When using the lamp z. B. as a pendant light is through the light exit field 16a at the top 13a and the beam splitter preferably located there 40 an indirect light component 6 decoupled upwards, the z. B. is directed to a ceiling. Furthermore, by the light exit field 16b on the bottom 13b and the diffuser disk preferably located there 50 a direct light component 7 decoupled down, the z. B. is directed to a work surface.

An advantageous embodiment for a beam splitter disc 40 is in 1 in a plan view of the entire lamp, in 2 in a lateral section and in 6 shown in a plan view of a cutout at one end flat profile light. The beam splitter disk 40 is preferably at a light scattering interior 15 facing inside 42 provided with a partially transparent reflection surface. This is located in the middle in the region of the longitudinal axis A of the lamp a ready longitudinal zone 43c with increased reflectivity and reduced light transmission. This contributes especially to the extraction of a downward direct light component of the luminaire. Symmetrically on both sides of the central longitudinal zone 43c close longitudinal zones 43b with reduced reflectivity and increased light transmission. These contribute particularly to the extraction of an upward indirect light component of the luminaire. Finally, at the edge zones of the beam splitter 40 two more, the longitudinal axis A symmetrical longitudinal zones 43a with again increased reflectivity and reduced light transmission. These areas on the long disc edges form an optical transition to the adjacent, opaque longitudinal profiles 11a . 11b ,

For generating the light zones 43a . 43b . 43c is the beam splitter disk 40 advantageous with a stripe pattern 44 busy. Its strips may have a different density and / or line thickness. In the 1 and 6 are particularly advantageous designs for striped pattern 44 shown in detail, which exemplifies large, thick stripes 44a and small, thin strips 44b is composed. This is where the in 1 and 6 shown area across the entire surface of the beam splitter 40 away and cover it completely. This shows the stripe pattern 44 in the longitudinal zones 43c and 43a with increased reflectivity with reduced light transmission a higher density and / or increased line thickness than in the longitudinal zones 43b with reduced reflectivity with increased light transmission. Furthermore, the stripes 44a . 44b of the stripe pattern 44 advantageous transverse to the longitudinal axis A and thus approximately orthogonal to the light units 20 . 30 in the longitudinal profiles 11a . 11b of the flat profile housing 1 oriented. For example, on the longitudinal zones 43a large, thick stripes 44a printed in medium density. Furthermore, in the longitudinal zones adjacent to the inside 43b small, thin stripes 44b also printed in a medium density. The central longitudinal zone lying in the area of the axis of symmetry A. 43c is with an alternating pattern of large, thick stripes 44a and small, thin strips 44b printed in a high density.

As in particular from the sectional view of 2 is apparent, are according to the invention in the longitudinal profiles 11a . 11b opposite each one light unit 20 . 30 with a lying behind it, to a transverse axis E of the flat profile light 1 symmetrical primary reflector 81 . 82 inserted. These are arranged so that these in a Lichtstreuungsinnenraum 15 between the longitudinal profiles 11a . 11b , the light exit field 16b for the direct light component 7 on the bottom 13b and the light exit field 16a for the indirect light component 7 at the top 13a Beam in laterally. When using the lamp z. B. as a pendant light thus carried the radiation approximately horizontally and thus parallel z. B. to an underlying floor or work surface.

According to 2 have the in the longitudinal profiles 11a . 11b insert light units 2 . 3 advantageous connection means 21 . 31 for the first, second bulbs 22 . 32 on, especially ballasts and contact sockets. The lighting means advantageously have an elongated shape. Preferably, fluorescent lamps or arranged in the form of strips LEDs can be used. Furthermore, the symmetrical to a transverse axis E of the lamp and behind the bulbs 22 . 32 arranged lateral primary reflectors 81 . 82 in cross section z. B. be executed semicircular. At an in 2 shown particularly advantageous embodiment, the primary reflector 81 first and second, preferably strip-shaped and large-area reflection areas 81a . 81b on. These are arranged symmetrically to the transverse axis E of the flat profile light and a central reflection region 81c integrally connected. The opposite primary reflector 82 is structured accordingly. Preferably, the central reflection region has an approximately bridge-like or arc-shaped cross-section, the curvature of which faces the associated illuminant and whose vertex lies approximately on the transverse axis E.

According to the invention is to increase the direct light component 7 in the light scattering interior 15 an additional central secondary reflector 9 , This is so in the region of the longitudinal axis A in the light exit field 16a for the indirect light component 6 at the top 13a arranged that a partial luminous flux of the light units 20 . 30 and the symmetrical primary reflectors 81 . 82 laterally irradiated light in the direction of the light exit field 16b for the direct light component 7 on the bottom 13b is diverted.

At the in 2 illustrated embodiment is the central secondary reflector 9 beneficial on the inside 42 the beam splitter disk 40 mounted along the longitudinal axis A, in particular via two angled contact surfaces 92a . 92b glued. Of these go two obliquely inclined reflection edges 91a . 91b off, which in a vertex 93 are merged. In the example of 2 the reflection edges on a flat, striped surface. In another embodiment, these may also be parabolically curved.

To achieve the desired magnification of the direct light component 7 especially contributes to that the vertex 15 of the central secondary reflector 9 in the light scattering interior 15 protrudes. Indicates the secondary reflector 9 a corresponding height, so is the light scattering interior 15 almost in two, the respective light unit 2 . 3 facing sections 15a . 15b divided. In the example of 2 reaches the top 93 far to the inside 52 the diffuser disk 50 down.

The effect of the central secondary reflector 9 in cooperation with the symmetrical primary reflectors 81 . 82 behind the bulbs 22 . 32 is the example of the left section 15a of the light scattering interior 15 in 2 in partial line symbolically represented partial luminous fluxes explained below by way of example. Partial light streams of this kind occur, of course, in a corresponding manner in the right partial light range 15b on. From the sum of all partial luminous fluxes in the light scattering interior 15 Finally, the decoupled indirect and direct light components 6 and 7 together.

So in the example of the 2 the indirect light component 6 fed by a partial luminous flux 6a1 , This is from the first light source 22 in steeper Angle up towards the upper light exit field 16a and the beam splitter preferably located there 40 radiated. This partial luminous flux is in particular of the longitudinal zone 43b on top 13a passed through and constitutes a substantial part of the Indirectlichtanteils 6 represents.

Furthermore, in the example of 2 the direct light component 7 by the exemplary partial luminous fluxes 7a1 . 7a2 . 7a3 and 7a4 fed. This is the partial luminous flux 7a1 from the first light means 22 also at steeper angles upwards towards the upper light exit field 16a and the beam splitter preferably located there 40 radiated. However, this partial luminous flux is from the beam splitter 40 especially over the longitudinal zones 43a and 43b down into the light scattering interior 15 reflected. This happens then the diffuser disk 50 down to the bottom 13b and contributes there to the direct light component 7 at. Also the partial light stream 7a2 contributes to this. This is from the first light source 22 both at shallower angles upwards in the direction of the beam splitter disk 40 as well as approximately horizontally in the Lichtstreuungsinnenraum 15 reflected. This partial light flow is over the first reflection edge 91a of the central secondary reflector 9 as a contribution to the proportion of direct light also through the diffuser disk 50 through to the bottom 13b reflected. In this case, the partial luminous flux arrives 7a2 on the one hand by reflection in particular at the longitudinal zone 43c the beam splitter disk 40 and on the other hand by direct beam path to the first reflection edge 91a , Furthermore, also carries the partial luminous flux 7a3 with the direct share at. This is from the first light source 22 at shallow angles down towards the diffuser disk 50 radiated and of it after appropriate dispersion down to the bottom 13b pass through. Finally, the partial luminous flux also contributes 7a4 to the direct share. This is from the first light source 22 at steeper angles down towards the diffuser disk 50 radiated and also after appropriate dispersion down to the bottom 13b pass through.

3 shows a side detail D through the flat profile of 2 in the area of the beam splitter disk 40 , Exemplary beam paths serve to illustrate the irradiation, distribution, scattering and decoupling of light fractions, in particular of the partial luminous fluxes 6a1 . 7a1 and 7a2 ,

If in these edge areas of the lower light exit field 16b at the transition to the longitudinal profiles by a partial luminous flux 7a4 In individual cases, too high luminance should occur, so it is possible due to the advantageous structure of the lamp according to the invention and with the aid of the additional central secondary reflector and optionally the advantageous beam splitter gain of the direct light component, if necessary, to reduce the light output of the lamps used. This can be z. B. can be achieved by adjustable means for dimming the lamps. On the other hand, for. As well as fluorescent tubes that have a reduced electrical power of max. 49 W or u. U. only max. 35 W are used without unreasonable restrictions in the radiation density of the direct light component are to be feared.

According to a further embodiment of the invention already shown in the figures, the diffuser disk can be used for this purpose 50 also on the edges to the longitudinal profiles 11a . 11b on the light scattering interior 15 facing inside 42 additional longitudinal zones 52a . 52b having a filter-like coating. This can advantageously be in the form of a partially transparent printing of the diffuser disk 50 in the longitudinal zones 52a . 52b be listed. So z. B. the longitudinal prisms on the inside 52 the diffuser disk 50 be sprayed with a partially transparent lacquer or a not incompletely covering ink. It is the support of a partially transparent color strip with the help of a digital printing method possible. By such a coating of the longitudinal zones 52a . 52b on the edge of the diffuser disk 50 becomes the partial luminous flux 7a4 advantageously weakened and thus only dampened down to the bottom 13b pass through.

This is exemplary in the 4 and 5 shown. It shows 5 a side detail C through the flat profile of 2 in the area of the lower diffuser disk 50 at the transition to the longitudinal profile 11a , Exemplary ray trajectories. serve to illustrate the irradiation, scattering and attenuation in particular of the partial luminous flux 7a4 , Here is the inside 52 the diffuser disk 50 according to the invention in a longitudinal zone 52a provided with a filter-like coating. Their filtering effect is by a corresponding decrease in the radiation density of the partial luminous flux 7a4 on the bottom 13b in comparison to the density in the light scattering interior 15 symbolizes.

5 shows a section of the lamp at one end in a plan view of the bottom 13b , In this case, the visible part of the light emission field 16b through the longitudinal profiles 11a . 11b and the cross profile 12a limited. In this is diffuser disk 50 inserted according to a preferred embodiment of the invention. The filter-like coatings of the longitudinal zones 52a . 52b on the inside 52 the diffuser disk 50 are symbolized by honeycomb pattern. The structure of the inside 51 , z. B. a plurality of parallel prisms for light scattering, is in for clarity in 5 not shown. In addition, the filter-like coating from the bottom 13b from in practice not readily visible.

LIST OF REFERENCE NUMBERS

A

longitudinal axis

B

Section line

C

Detail in the area of the lower diffuser disk 50

D

Detail section in the area of the upper beam splitter disk 40

e

transverse axis

1

frame-shaped flat profile housing

11a, 11b

first, second U-shaped longitudinal profile

12a, 12b

first, second U-shaped cross section

13a

Top, d. H. Ceiling side, the flat profile light

16a

Light emission field on top 13a with beam splitter disc 40

13b

Bottom, d. H. Bottom side, the flat profile light

16b

Light emission field at the bottom 13b with diffuser disc 50

15

Light scattering interior

15a, 15b

first, second subarea

2, 3

first, second light unit in longitudinal profiles 11a . 11b inlaid

21, 31

Connection means light unit, especially ballast, contact base

22, 32

first, second bulbs, z. B. fluorescent lamp or LED spotlight

40

Beam splitter in the light exit field 16a on top 13a

41

outside

42

Inner side with light-reflecting surface

43a

first longitudinal zones with increased reflectivity and reduced light transmission in the area of the longitudinal profiles

43b

second longitudinal zones with reduced reflectivity and increased light transmission on both sides of the longitudinal axis A.

43c

third longitudinal zone with increased reflectivity and reduced light transmission in the region of the longitudinal axis A.

44

stripe pattern

44a

large, thick strips with full-surface coating

44b

small-area, thin strips with full-surface coating

45

strip-shaped support area for central reflector

50

Diffuser disc in the light exit field 16b at the bottom 13b

51

outside

52

Inside with refractive surface, z. B. Parallel prisms

52a, 52b

Longitudinal zones with semi-transparent, filter-like coating to reduce light transmission at the edges of the disc

6

indirect light component

6a1

Partial light flow of the first light means 22 at steeper angles towards beam splitter disk 40 and in particular of their longitudinal zone 43b on top 13a let through

7

direct light proportion

7a1

Partial light flow of the first light means 22 emitted at steeper angles towards beam splitter disk

7a2

Partial light flow of the first light means 22 at shallow angles towards beam splitter disk 40 and radiated horizontally

7a3

Partial light flow of the first light means 22 towards the diffuser disk 50 radiated at shallow angles

7a4

Partial light flow of the first light means 22 in the direction of the coated longitudinal zone 52b on the edge of the diffuser disk 50 radiated

81, 82

symmetrical, lateral primary reflectors

81a, 81b

first, second reflection areas, symmetrical to the transverse axis E of the flat profile light

81c

central reflection area

9

central secondary reflector on the inside 42 the beam splitter disk 40 along the long axis A

91a, 91b

first, second reflection flanks, in particular parabolic

92a, 92b

contact surfaces

93

Vertex in the light scattering interior 15

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 10335784 A1 [0004]
• DE 202009014258 U1 [0005]
• DE 202009010018 U [0006]

Claims (20)

Luminaire with a frame-shaped flat profile housing which is symmetrical to a longitudinal axis (A) ( 1 ) with two opposite longitudinal profiles ( 11a . 11b ), whereby a. a light exit field ( 16b ) on a lower side ( 13b ) for emitting a direct light component ( 6 ) and a light exit field ( 16a ) on a top side ( 13a ) for emitting an indirect light component ( 7 ), b. in the longitudinal profiles ( 11a . 11b ) lying opposite one light unit ( 20 . 30 ) with an underlying, to a transverse axis (E) of the flat profile lamp ( 1 ) symmetrical primary reflector ( 81 . 82 ) are arranged so that they in a Lichtstreuungsinnenraum ( 15 ) between the longitudinal profiles ( 11a . 11b ), the light exit field ( 16b ) for the direct light component ( 7 ) on the bottom ( 13b ) and the light exit field ( 16a ) for the indirect light component ( 7 ) at the top ( 13a ), and c. to increase the proportion of direct light ( 7 ) in the light scattering interior ( 15 ) a central secondary reflector ( 9 ) so in the region of the longitudinal axis (A) in the light exit field ( 16a ) for the indirect light component ( 6 ) at the top ( 13a ) is arranged that a part ( 7a2 ) of the light units ( 20 . 30 ) and symmetrical primary reflectors ( 81 . 82 ) of laterally irradiated light in the direction of the light exit field ( 16b ) for the direct light component ( 7 ) on the bottom ( 13b ) is deflected. Luminaire according to Claim 1, with a beam splitter disk ( 40 ) for the indirect light component ( 7 ) in the light exit field ( 16a ) at the top ( 13a ). Luminaire according to claim 2, wherein the beam splitter disk ( 40 ) approximately in the middle along the longitudinal axis (A) parallel to the light units ( 20 . 30 ) longitudinal zone ( 43c ) with increased reflectivity with reduced light transmission and on both sides in each case a longitudinal zone ( 43b ) having reduced reflectivity with increased light transmission. Luminaire according to claim 3, wherein the beam splitter disk ( 40 ) on both sides to the longitudinal zones ( 43b ) with reduced reflectivity with increased light transmission in the area of the longitudinal profiles ( 11a . 11b ) of the flat profile housing ( 1 ) each additionally a longitudinal zone ( 43a ) again with increased reflectivity with reduced light transmission. Luminaire according to claim 3 or 4, wherein the longitudinal zones ( 43a . 43b . 43c ) on a light scattering interior ( 15 ) facing inside ( 42 ) of the beam splitter disk ( 40 ) are mounted, in particular as a striped pattern with different densities and / or line weights are printed. Luminaire according to one of claims 2 to 5, wherein the central secondary reflector ( 9 ) on a light scattering interior ( 15 ) facing inside ( 42 ) of the beam splitter disk ( 40 ) is attached, in particular glued. Luminaire according to one of the preceding claims, with a diffuser disc ( 50 ) in the light exit field ( 16b ) for the direct light component ( 6 ) on the bottom ( 13b ). Luminaire according to claim 7, wherein the diffuser disc ( 50 ) on a light scattering interior ( 15 ) facing inside ( 52 ) Has longitudinal prisms. Luminaire according to claim 7 or 8, wherein the diffuser disc ( 50 ) at the edges to the longitudinal profiles ( 11a . 11b ) on the light scattering interior ( 15 ) facing inside ( 42 ) Longitudinal zones ( 52a . 52b ) having a filter-like coating. Luminaire according to claim 9, with a partially transparent printing as a filter-like coating in the longitudinal zones ( 52a . 52b ). Luminaire according to one of the preceding claims, wherein the light units ( 20 . 30 ) in each case at least one elongate illuminant ( 22 ) inside the longitudinal profiles ( 11a . 11b ) of the flat profile housing ( 1 ) exhibit. Luminaire according to Claim 11, each having a fluorescent tube as an elongated luminous means ( 22 ). Luminaire according to claim 12, wherein the respective one fluorescent tube has an electric power of a maximum of 49 watts. Luminaire according to claim 12, wherein the respective one fluorescent tube has a maximum electrical power of 35 watts. Luminaire according to Claim 11, each having a band of light-emitting diodes as an elongate luminous means ( 22 ). Luminaire according to one of the preceding claims, wherein the central secondary reflector ( 9 ) one in the Lichtstreuungsinnenraum ( 15 ) protruding vertexes ( 15 ) having. Luminaire according to claim 16, wherein the vertex ( 15 ) of the central secondary reflector ( 9 ) so far protrudes that in the Lichtstreuungsinnenraum ( 15 ) of the respective light unit ( 2 . 3 ) facing subareas ( 15a . 15b ). Luminaire according to claim 16 or 17, wherein the central secondary reflector ( 9 ) of the respective light unit ( 2 . 3 ), in particular parabolically curved, reflecting flanks ( 91a . 91b ) having. Luminaire according to one of the preceding claims, wherein the primary reflectors ( 81 . 82 ) each two strip-shaped, symmetrically to the transverse axis (E) arranged large-area reflection areas ( 81a . 81b ), which have a central reflection region ( 81c ) are integrally connected. Luminaire according to claim 19, wherein the central reflection region ( 81c ) has an approximately bridge-like cross section with a vertex, which the associated illuminant ( 22 ) and approximately on the transverse axis (E) of the lamp is located.

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