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)
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ISBN:9781305632134
Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma
Chapter3: Power Transformers
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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

 

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
Transcribed Image Text: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
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