Typical Illumination Measurements

Outdoor Illumination

Light in Footcandles
Direct Sunlight

10,000 - 13,000 fc
Full Daylight

1,000 - 2,000 fc
Overcast Day

100 fc
Twilight

1 fc
Deep Twilight

0.1 fc
Full Moon

0.01 fc
Moonless Night

0.0001 fc
Overcast Night

0.000001 fc
Indoor  Illumination

Light in Footcandles
Assembly Line

20 fc
General Work Area

30 fc
Fine Assembly Work

100 fc
Retail Store

50 fc
Accounting Work

50 fc
Bank Lobby

20 fc
Offices

50 fc
Operating Table

1,800 fc

To convert to lux multiply footcandles by 10.764



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