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Elliott Electric Supply

Achieving 100 Footcandle Lighting


The chart in this guide shows the number of fixtures needed to light various room areas with 100 foot-candle brightness, factoring in mounting height and room width.

Number of Fixtures needed = Room area (sq ft) / sq ft per fixture
(Assumes Good Reflectance)

Room Factor:
W - width = 4 x Mounting Height
M - width = 2 x Mounting Height
N - width = Mounting Height
Fixture Catalog # Room Factor SQ. FT. per Fixture
W240A N 16
M 23
W 29
W440A N 33
M 47
W 58
SS196 N 20
M 30
W 40
SS296 N 38
M 58
W 76
STN296HO N 54
M 84
W 109
IC296 N 37
M 56
W 72
IA296HO N 51
M 78
W 100
2G440A N 38
M 55
W 67
2EP3GX N 26
M 33
W 38