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(b) Suppose: NWηUFDFMF= No. of lamps = Wattage of each lamp = Efficiency of each lamp (lm/ watt )= Utilization Factor =
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(b) Suppose: NWηUFDFMF= No. of lamps = Wattage of each lamp = Efficiency of each lamp (lm/ watt )= Utilization Factor =
(b) Suppose: NWηUFDFMF= No. of lamps = Wattage of each lamp = Efficiency of each lamp (lm/ watt )= Utilization Factor = Depreciation Factor = Maintenance Factor 3 By using Lumen method prove that DF is the reciprocal of MF.
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