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Thank you for the replies. How close do you have to be for the infrared light to be dangerous? When I tell him it is not safe, he tells me that he asked the manufacturer and that they said it's safe. It's frustrating because as many times as I tell him it is unsafe, he just responds saying...

Hello, I just registered because I'm trying to get some advice and learn more about laser safety. My friends and I play frisbee at night using glow necklaces and an LED lighted frisbee. Normally, we use bike lights as endzone markers, but my friend wants to buy four 50mW green laser pointers...