A hall of 30 metres by 15 metres with a ceiling height of 5 metres is to be provided with a general illumination of 120 lumens/m2. Taking a coefficient of utilisation of 0.5 and depreciation factor of 1.4 , determine the number of fluorescet tubes required, their spacing, mounting height and total wattage.Take luminous efficiency of fluorescent tube as 40 lumens per watt for 80 watt tubes.
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- babujan Alam Babujan alam
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A drawing hall 30x15 meters with a ceiling height of 5 meters is to be provided with a general illumination of 120 lux. Taking a coefficient of utilization of 0.5 and depreciationfactor 1.4, determine the number of fluorescent tubes required , their spacing mounting height and total wattage. Tasking luminous efficiency of fluorescent tube as 40 lumens/wattfor 80 watt tube.
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