Low-pressure sodium vapour discharge lamp

Details Low-pressure sodium vapour discharge lamp Low-pressure sodium vapour discharge lamp

H - Electricity

01

J

313/7, 313/83

H01J 61/34 (2006.01) H01J 61/30 (2006.01) H01J 61/35 (2006.01) H01J 61/74 (2006.01)

Patent

CA 1155897

PHN 9623 ABSTRACT: Low-pressure sodium vapour discharge lamp. The lamp comprises a cylindrical discharge tube and an outer bulb enveloping this tube. The outer bulb has a trans- parent layer which reflects infrared radiation. Accord- ing to the invention the resistance per square of the infrared reflecting layer is approximately 5 ohm. A luminous efficacy of 100 lumen per watt can be obtained at a lamp power of 8 watts. The lamp is particularly suitable for security lighting.

364122

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