| 摘要 |
PURPOSE:To obtain a desired light distribution without any unevenness of illuminance by uprightly providing frames on the opposite side on a rectangular frame body, and supporting a lighting body on the frames and ceiling plate holding members on the frames respectively. CONSTITUTION:A rectangular frame body is formed of T bars 1a, 1b for constituting a system ceiling. Rectangular frames 2 are uprightly fixed on a pair of the opposed T bars 1b of the rectangular frame body. A lighting body 11 for housing a lamp 9 is arranged under cross bars 7. Ceiling plates 15-18 are disposed onto the frames 2 formed on the rectangular frame body constituted of the T bars 1a, 1b and a fixture supporting frame constituted of the cross bars 7. Consequently, the shape of the ceiling plates 15-18 can be adequately varied according to the shape, position or light distribution of the lighting body 11. Therefore, light distribution or illuminance can be adjusted so that unevenness of illuminance can be eliminated, thus obtaining a lighting effect of a desired light distribution characteristic. |
