Assume that 40% of the light emitted by a 1000 W metal halide lamp (110 000 lumens)
Question:
Assume that 40% of the light emitted by a 1000 W metal halide lamp (110 000 lumens) illuminates a surface with the area of a 32 ft diameter.
a. Determine the average illuminance of the surface in foot-candles.
b. Determine the average illuminance of the surface in lux.
c. What would the average illuminance be if only half of the light illuminated the surface?
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a Determine the average illuminance of the surface in footcandles First calculate the area of the il...View the full answer
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Related Book For 
Mechanical And Electrical Systems In Architecture Engineering And Construction
ISBN: 9780135000045
5th Edition
Authors: Frank R Dagostino, Joseph B Wujek
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