Patent ID: 7980723

Claim:
A luminaire having a plane of symmetry S, the luminaire comprising: a first and a second concave reflectors oppositely disposed in relation to the plane of symmetry S and having outer rims, the reflectors comprising substantially flat elongate facets extending along the plane of symmetry S; a light-emission window disposed between the outer rims of the reflectors; a third reflector disposed opposite the light-emission window between the first and the second reflector; and a first and a second lamp holder, each having a center in the plane of symmetry S, for accommodating, between the reflectors, a first elongate electric lamp for emitting light of a first spectrum and defining a first lamp axis and a second elongate electric lamp for emitting light of a second spectrum and defining a second lamp axis, the centers being situated on the first and the second lamp axis, respectively, the first lamp holder being further remote from the light-emission window than the second lamp holder; wherein each of the reflectors comprises: (i) a first extending from a point P 1 towards the light-emission window, said point P 1 being located adjacent the plane of symmetry S in a cross-section through the lamp holders, wherein a line from the point P 1 to a point M located in the middle between the centers of the lamp holders extends at an angle δ to the plane of symmetry S, said angle δ ranging from 25° to 50°, said first facet being oriented so as to be capable of generating a mirror image of the center of the first lamp holder with a distance to the plane of symmetry S which is smaller than a distance from point P 1 to the plane of symmetry S, (ii) a second facet adjoining the first facet at a point P 2 , said second facet being oriented so as to be capable of generating a mirror image of the center of the first lamp holder and a mirror image of the center of the second lamp holder, both with a distance to the plane of symmetry S which is larger than a distance from point P 2 to the plane of symmetry S, and (iii) a third facet adjoining the second facet at a point P 3 , P 3 having a distance to the plane of symmetry S which is in between the distances of the mirror images of the center of the first lamp holder and of the center of the second lamp holder in the second facet, said third facet being oriented so as to be capable of generating mirror images of the center of the first lamp holder and of the center of the second lamp holder, both with a distance to the plane of symmetry S which is larger than a distance from point P 3 to the plane of symmetry S.