Energy-conserving solid-state-controlled illumination system

Details Energy-conserving solid-state-controlled illumination system Energy-conserving solid-state-controlled illumination system

1977-12-19

1979-04-03

Smith, Alfred E.

Electric lamp and discharge devices: systems

Current and/or voltage regulation

307141, 315293, 315DIG7, G05F 100, H05B 3702, H05B 3904, H05B 4136

Patent

active

041479610

ABSTRACT:
An energy-conserving solid-state-controlled illumination system which normally operates high-intensity discharge lamps at about rated power consumption with a relatively high output for a predetermined proportion of the night when a high degree of illumination is desirable. The illumination system then operates the lamps at about a predetermined power less than rated power consumption when a lower degree of illumination can be tolerated. The relative period of time the lamps are operated at the higher and lower levels of illumination is automatically adjusted according to the day-night seasonal variations.

REFERENCES:
patent: 3885197 (1975-05-01), Moses
patent: 3940660 (1976-02-01), Edwards

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