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Red and IR LEDs in the barcode reader of the kiosk of McDonalds, Big Center Kiryat Ata
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https://www.youtube.com/watch?v=uaTwod7kxzM
The IR LED are visible to the naked eyes as a very dim red color. They are dimmer than the IR LEDs of B&W security cameras, but brighter than IR LEDs of remote controls.
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