IES Lighting Handbook: 1981 reference volume

IES Lighting Handbook: 1981 reference volume

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For example the two-lamp 40-watt rapid start ballast losses have been reduced by 4 or 5 watts per lamp over ... Preheating can be effected by use of a manual switch or one which is activated by application of voltage to the ballast circuit.

Title:IES Lighting Handbook: 1981 reference volume
Author: Illuminating Engineering Society of North America, Illuminating Engineering Society
Publisher: - 1981

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