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How many 40w 60lmw flourescent lamps would be needed to

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How many 40W, 60lm/W flourescent lamps would be needed to provide an illuminance of 250lm/m^2 on a factory floor of an area 25m x 30m? Assume the lights are 10m above the floor and that half their flux reaches the floor

Reference no: EM13592273

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