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ballast

A device used to start and thereafter control the voltage (or regulate the current) in a fluorescent lamp. The ballast efficacy factor, a measure of the efficiency of fluorescent lamp ballasts, is the relative light output divided by the power input. The ballast factor is the ratio of light output of a fluorescent lamp operated on a ballast to the light output of a lamp operated on a standard or reference ballast.

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• LIGHTING TOPICS

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