POWER SUPPLY CIRCUIT OF FILAMENT LAMPS IN LUMINAIRE Russian patent published in 2002 - IPC

FIELD: lighting engineering, illumination of public, industrial and residential buildings and open sites. SUBSTANCE: laminaire provides for three operational conditions: all filament lamps glow with half-incandescence, half of filament lamps glow with total incandescence and all filament lamps glow with total incandescence. Laminaire has first and second filament lamps or groups of said lamps connected in parallel and linked to first and second wires of supplying network. Point of parallel connection of filament lamps is connected to first wire of network via first contact pair. Second contact pair is positioned between first filament lamp and first wire of supplying network. Third contact pair is placed between first filament lamp and second wire of supplying network. EFFECT: simplified design, enhanced reliability and functional efficiency of power supply circuit of filament lamps in luminaire. 8 dwg