I will agree with this, I think they can see the movement of light and if an unusual predator like sound is associated with it, they will "sometimes" spook. However, I've been deer hunting for 25+ years and I never had near the close encounters with a yellowish halogen than I have with the newer bright white LEDs. I think it has something to do with the 4000k-5000k LED color temperature. Interestingly enough that color temp range is the same range of bright moon light. Maybe it's a more natural color to them...I don't know?? I can tell you this for a fact, I could never get as close to deer in daylight or low light as I can when I'm using the bright white led. I have had entirely too many close encounters to say it is harmful! Good Lord willing, I will take lots of video this upcoming year to prove my point.
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