Three lamp ballast

Electric lamp and discharge devices: systems – With cathode or cathode heater supply circuit – Plural load device systems

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Details

315185R, 315187, 315278, H05B 3900, H05B 4114

Patent

active

046442278

ABSTRACT:
A low pressure gas discharge lamp ballast circuit is provided for three series-connected low energy gas discharge lamps, in which a first starting capacitor provides a starting voltage to one of the lamps, and a second starting capacitor provides a starting voltage to a second one of the lamps in sequence, so that the ballast losses can be minimized by reducing the ratio of the voltage applied across the three lamp system to the total lamp voltage, while still maintaining the light output and not having to use expensive lamp bases and lampholders.

REFERENCES:
patent: 3080503 (1963-03-01), Brooks
patent: 3351809 (1967-11-01), Eppert
patent: 4259616 (1981-03-01), Smith
patent: 4477748 (1984-10-01), Grubbs
patent: 4525649 (1985-06-01), Knoll et al.

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