High intensity discharge lamps with uniform color

Details High intensity discharge lamps with uniform color High intensity discharge lamps with uniform color

1978-10-23

1981-11-03

Demeo, Palmer C.

Electric lamp and discharge devices

With support and/or spacing structure for electrode and/or...

For plural electrodes of discharge device

H01J 6120

Patent

active

042988136

ABSTRACT:
The amount of mercury used in a metal halide-mercury arc discharge lamp is controllably selected to produce a voltage gradient along the arc discharge of between approximately 2 v/cm and approximately 10 v/cm. When such a lamp is operated vertically, the usually observed color separation does not occur. Even though this voltage gradient is substantially less than the conventional gradient employed in such lamps, no significant loss of efficacy occurs.

REFERENCES:
patent: 3384775 (1968-05-01), Ishler et al.
patent: 3654506 (1972-04-01), Kuhl et al.
patent: 3781586 (1973-12-01), Johnson
patent: 3911308 (1975-10-01), Akutsu et al.
patent: 3958145 (1976-05-01), Jack et al.
patent: 4155025 (1978-04-01), Dobrusskin et al.

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