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Measuring Lighting Levels

Measuring Light Levels

 

Light is measured in Foot Candles ( fcd )or in lux

 

1 lumen =          Light Intensity from 1 Candle.

foot Candle     =          1lumen / Sq Ft

1 lux      =          1 lumen / Sq Mtr

1 ft Candle      =          10.752 lux.

 

 

Approximate Light levels

 

Lighting Levels

(ftcd)

(lux)

Sunlight

10,000

107,000

Full Daylight

1,000

10,700

Overcast Day

100

1,070

Twilight

1

10.9

Deep Twilight

.1

1.09

Full Moon

.01

.109

Quarter Moon

.001

.0109

 

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