LUMEN METHOD An office has length of 30m, width = 12m and a clear height of 3.5m. Mounting Height = 0.7m - Area to be illuminated to a general lighting is 250 lux using twin lamp 32-watt CFL luminaire. - Each lamp has an initial output of 85 lumen per watt - Maintenance factor is 0.70 and utilization factor is 0.75
LUMEN METHOD An office has length of 30m, width = 12m and a clear height of 3.5m. Mounting Height = 0.7m - Area to be illuminated to a general lighting is 250 lux using twin lamp 32-watt CFL luminaire. - Each lamp has an initial output of 85 lumen per watt - Maintenance factor is 0.70 and utilization factor is 0.75
Power System Analysis and Design (MindTap Course List)
6th Edition
ISBN:9781305632134
Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Chapter3: Power Transformers
Section: Chapter Questions
Problem 3.7MCQ: Consider Figure 3.5. Match the following, those on the left to those on the right. (i) Im (a)...
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Lumen method
Find:
a.)minimum spacing between luminaires
b.) number of rows required
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