Internal lighting device using direct and secondary radiation

摘要

The lighting device (13) is used with a standard ceiling panel as a built-in ceiling light for a suspended ceiling, with an electronically driven lamp (4) associated with a primary parabolic raster (2) and a secondary parabolic reflector (1), respectively providing direct and indirect illumination. Pref the reflection surfaces and the visible surfaces of the lighting device are made of highly polished A1, or coated with a white lacquer. The direct radiation intensity is pref reduced to below 200cd/sq m for a radiation angle of above 60 degrees.