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    Can you see the beam of a green 5mw laser outdoors at night with fog?

    I'm building a framed laser harp and would like to keep the power as low as possible to avoid eye damage to users. Is a 5mw green laser diode too weak to have a visible beam if I use a fog machine and place the harp outdoors during the night time? If so, what is the minimum power rating you...




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