H - Electricity – 01 – J
Patent
H - Electricity
01
J
313/115
H01J 17/20 (2006.01) H01J 61/12 (2006.01) H01J 61/22 (2006.01)
Patent
CA 1101918
ABSTRACT: The invention relates to a high-pressure sodium vapour discharge lamp comprising a discharge tube con- taining sodium and xenon. In accordance with the invention the inside diameter of the discharge, tube is below 5 mm and greater than 1 mm. In addition the xenon pressure is relatively high in the operating condition of the lamp which - to- gether with a pressure of the sodium in a given range - can result in a high luminous efficacy of the lamp.
300593
N.v. Philips Gloeilampenfabrieken
Van Steinburg C.e.
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