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infrared camera to see in total darkness?
2007-7-12        
Economically commercialized infrared cameras, some of them are also water- resistant to be installed outdoor, can see up to 30ft distance in total darkness. If you need to see farther, you may need professional infrared illuminators but they are usually expensive and complicated to install due to its emission of heat. Infrared cameras work as ordinary video camera during daytime. Most color infrared cameras work as B/W ones at night. Minimum illumination for most B/W cameras is 0.1 lux so you do not necessarily need infrared cameras or illuminators if there is some kind of lighting. 
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