Method and system for switchable light levels in operating gas d

Details Method and system for switchable light levels in operating gas d Method and system for switchable light levels in operating gas d

1997-03-13

1999-09-07

Philogene, Haissa

Electric lamp and discharge devices: systems

Condenser in the supply circuit

Electric switch in the condenser circuit

315241R, 315209R, 315DIG4, H05B 3700

Patent

active

059491965

ABSTRACT:
An arrangement for switchably operating one or more gas discharge lamps, such a compact or circline fluorescent lamps, with a single ballast commonly used with a linear fluorescent lamp. One or more capacitors is either in parallel or in series with the gas discharge lamp. When engaged by a switch, the capacitor either shunts or reduces the current to the gas discharge lamp in a manner which allows appropriate starting voltage, appropriate operating current and a plurality of illumination levels of the gas discharge lamp.

REFERENCES:
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patent: 4237403 (1980-12-01), Davis
patent: 4284925 (1981-08-01), Bessone et al.
patent: 4414489 (1983-11-01), Young
patent: 5084653 (1992-01-01), Nilssen
patent: 5099176 (1992-03-01), Fellows et al.
patent: 5245253 (1993-09-01), Quazi
patent: 5315214 (1994-05-01), Lesea
patent: 5424610 (1995-06-01), Pelton
patent: 5457360 (1995-10-01), Notohamiprodjo et al.
patent: 5491385 (1996-02-01), Nilssen

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