1. A school classroom with general dimension of 24 x 30 feet is lighted with 10 fluorescent lamp 4F 40 T12 WW rapid start lamp. Calculate the initial and maintaned illumination in foot candle and lux, assuming that the coefficient of utilization is 0.35 and the maintenance factor is 0.70.
2. An office room with general dimension of 8 x 20 meters is to be lighted at an average maintaned foot candle of 50. How many 3 lamp fixtures of 120 centimeterslong F40 T12 WW rapid start fluorescent lamps are required assuming 0.38 cu and 0.75 mf?
Showing posts with label I. week 14. Show all posts
Showing posts with label I. week 14. Show all posts
Sunday, February 28, 2010
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