Auxiliary lighting system for a gaseous discharge lamp

Details Auxiliary lighting system for a gaseous discharge lamp Auxiliary lighting system for a gaseous discharge lamp

H - Electricity

05

B

315/22

H05B 37/04 (2006.01)

Patent

CA 1043416

AUXILIARY LIGHTING SYSTEM FOR A GASEOUS DISCHARGE LAMP Abstract Of The Disclosure An emergency or auxiliary lighting system for a gaseous discharge lamp is provided with an auxiliary lamp controlled by a switch which is biased to remain in a closed position. A control circuit, responsive to the voltage across the gaseous discharge lamp, produces a voltage proportional thereto which is opposed to the biasing control. During any time that the gaseous discharge lamp provides more than a minimum adequate light output, the control circuit voltage becomes greater than the biasing control to open the switch. Also, in the event of a power interruption, the control circuit closes the switch.

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