High-pressure sodium vapor lamp

Details High-pressure sodium vapor lamp High-pressure sodium vapor lamp

1989-02-27

1990-10-16

Mis, David

Electric lamp and discharge devices: systems

Pulsating or a.c. supply

315326, 315358, 313638, H05B 4130

Patent

active

049637967

ABSTRACT:
A high-pressure sodium vapor lamp with elevated color temperature, high light yield and improved color rendering properties for general illumination purposes uses sodium or sodium amalgam with mole fractions x.sub.Na >0.9 as the arc media. The lamp power supply supplies pulses with a duty cycle .GAMMA.of 0.01>.GAMMA.>0.1 with alternating polarity, or with mole fractions x.sub.Na >0.95 even at uniform polarity, respectively.

REFERENCES:
patent: 4884009 (1989-11-01), Rothwell, Jr. et al.

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