Energy-conserving ilumination system

Details Energy-conserving ilumination system Energy-conserving ilumination system

H - Electricity

05

B

315/44

H05B 41/38 (2006.01)

Patent

CA 1131693

24 45,623I ABSTRACT OF THE DISCLOSURE An energy conserving solid-state-controlled il- lumination system which operates high-intensity-discharge lamps. The system operates the lamps at about a predeter- mined rated power consumption with a relatively high light output for a predetermined initial period of time during the initial night when a high degree of illumination is most needed. The system then operates the lamps for a later period of the night at a reduced power for a second predetermined period of time when a lower degree of illum- ination can be tolerated. Then if the lamps are still energized according to seasonal variations, the system thereafter operates the lamps at the relatively high light output for the remainder of the night to accommodate early morning traffic.

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