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Most of the bright IR lights you find on typical surveillance cameras actually visibly look a little red. I wouldn't think the same lights would be used if the intention is to spy in secret.


That's exactly right, and part of that is because they're cheap and put off some visible light.

Thankfully the perverts who put this stuff in airbnbs just go to amazon and search and buy cheap stuff, which is easy to detect.


The lower wavelengths like 850nm IR LEDs are visible. Some cameras use higher wavelengths like 940nm IR LEDs and they aren't.




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