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Title: Very high efficacy electrodeless high intensity discharge lamps

Abstract

An electrodeless arc lamp comprises an outer jacket hermetically sealing and thermally protecting an arc tube inside which has an upwardly convex bottom center section. The absence of chemically reactive electrode material makes it possible to use metal halides other than iodides. The tube contains chlorides, bromides or a mixture thereof of scandium and sodium in a nearly equimolar relationship in addition to mercury and an inert gas. Good color balance can be obtained at reduced reservoir temperature and with less power loss. Reduction in wall temperature makes it possible to attain longer lamp life.

Inventors:
Issue Date:
Research Org.:
Lawrence Berkeley Lab., CA (USA)
OSTI Identifier:
5657770
Application Number:
ON: DE86013760
Assignee:
Dept. of Energy
DOE Contract Number:  
AC03-76SF00098
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; 32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; LIGHT BULBS; DESIGN; EFFICIENCY; 420200* - Engineering- Facilities, Equipment, & Techniques; 320100 - Energy Conservation, Consumption, & Utilization- Buildings

Citation Formats

Johnson, P D. Very high efficacy electrodeless high intensity discharge lamps. United States: N. p., 1985. Web.
Johnson, P D. Very high efficacy electrodeless high intensity discharge lamps. United States.
Johnson, P D. Thu . "Very high efficacy electrodeless high intensity discharge lamps". United States.
@article{osti_5657770,
title = {Very high efficacy electrodeless high intensity discharge lamps},
author = {Johnson, P D},
abstractNote = {An electrodeless arc lamp comprises an outer jacket hermetically sealing and thermally protecting an arc tube inside which has an upwardly convex bottom center section. The absence of chemically reactive electrode material makes it possible to use metal halides other than iodides. The tube contains chlorides, bromides or a mixture thereof of scandium and sodium in a nearly equimolar relationship in addition to mercury and an inert gas. Good color balance can be obtained at reduced reservoir temperature and with less power loss. Reduction in wall temperature makes it possible to attain longer lamp life.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1985},
month = {10}
}