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This chart compares the different levels of measuring the illumination of a scene. Most surveillance cameras' sensitivity is measured in lux, while light output of a light source is measured in FTCD or foot candles. Use this chart when choosing a surveillance camera for a given area, or choosing lighting to illuminate the area to be surveilled.
Condition Illumination Scale Details
FTCD Lux
Sunlight
Full Daylight
Overcast Day
Very Dark Day
Twilight
Deep Twilight
10,000
1,000
100
10
1
0.1

107,527
10,764
1,076
107.64
10.76
1.08
Daylight Range
       
Full Moon
Quarter Moon
Starlight
Overcast Night
0.01
0.001
0.0001
0.00001
0.108
0.0108
0.0011
0.0001
Low Light Range