How many lumens do I need to...

Justin Case

Flashlight Enthusiast
Joined
Mar 19, 2008
Messages
3,797
The US Army has done a lot of research on target detection, recognition, and identification in low light at the Army Night Vision Lab at Ft. Belvoir. Try Googling various combinations of the terms above. To get you started, try Googling "Johnson's criteria".
 
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