High pressure sodium discharge lamp

Details High pressure sodium discharge lamp High pressure sodium discharge lamp

1991-06-27

1992-09-22

LaRoche, Eugene R.

Electric lamp and discharge devices: systems

Discharge device load

315358, 313565, 313571, 313639, 313642, H05B 4100

Patent

active

051500175

ABSTRACT:
A high pressure sodium lamp having a fill within an elongated arc tube comprising an inert starting gas, mercury and sodium wherein said mercury and sodium being are in an amount less than two milligrams per cubic centimeter of said volume of the interior of the arc tube wherein the weight ratio of sodium to mercury is less than 1 to 20 whereby the lamp is saturated with sodium and unsaturated with mercury at said predetermined nominal output voltage and does not extinguish at an input voltage exceeding about 90 percent of said rated voltage.

REFERENCES:
patent: 4755721 (1988-07-01), Okada et al.
patent: 5001396 (1991-03-01), Snellgrove et al.

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