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ballast efficiency

Defined in 1 place of the United States Code.

In general.—The term "ballast efficiency" means, in the case of a high intensity discharge fixture, the efficiency of a lamp and ballast combination, expressed as a percentage, and calculated in accordance with the following formula: Efficiency = Pout/Pin.

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The term “ballast efficiency” means, in the case of a high intensity discharge fixture, the efficiency of a lamp and ballast combination, expressed as a percentage, and calculated in accordance with the following formula: Efficiency = Pout/Pin.

Source