Patent ID: 7591567

Claim:
A luminaire for illuminating a target zone having plural subregions in front of and to the sides of the luminaire, the luminaire comprising: a housing having walls defining a bottom opening, such opening defining a plane; a lamp holder in the housing positioned to support an electric lamp axially oriented generally perpendicular to the plane, such lamp having a light source substantially parallel to the axis of the electric lamp and having plural source-sectors; and a reflector in the housing partially surrounding the lamp and its light source, the reflector having: a segmented center portion having first and second side edges each forming sides of the bottom opening and a first plurality of center segments each of which is parabolic in cross-section, the parabolic cross-sections of the segments having focal points in different ones of the plural light source-sectors such that each segment directs a preponderance of its reflected light toward a particular target zone subregion in front of the luminaire; and a pair of segmented side portions each forming sides of the bottom opening and each joined to the center portion along a respective one of the side edges, each side portion having a second plurality of side segments each of which is parabolic in cross-section, the parabolic cross-sections of the segments having focal points along the light source-sectors such that each segment directs a preponderance of its reflected light toward a particular target zone subregion to a respective side of the luminaire.