http://www.outdoorlanternsonsale.com/light-flashlight/
What is the infrared light for in a surefire flashlight? Can you see it? What is it for?
It's a strange thing that surefire, the combat flashlight manufacturer, made a flashlight that has an infrared LED bulb. What is it for even if you can't see it well?
Night vision. Humans cant see the infra-red part of the spectrum.
So when in combination with night vision goggles you can see the objects that the infra-red light illuminates but someone without night vision goggles can't see the light.
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