A factory hall of 80 m × 25 m is required to be illuminated with an i – McqOptions

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1.	A factory hall of 80 m × 25 m is required to be illuminated with an illumination of 15 candle per square meter using 120 lamps each having an efficiency of 15 lumens per watts. Assuming an utilization factor and depreciation factor of 0.4 and 0.7 respectively, the estimated wattage of lamps is ______.
A.	200 W
B.	60 W
C.	100 W
D.	40 W
Answer» C. 100 W

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