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... Is it safe when it gets that bright ? Ie radiation stuff !
Erm......... Give up, ask me another.
I once had a flourescent divers watch and found that it fluoresced more after exposure to ultraviolet light. (At a club in Tenerife) It fluoresced so much that by the end of my holiday it wouldn't flouresc at all.Perhaps you were using a led torch with a some ultraviolet in the spectrum?
Quote from: neilep on 03/11/2011 13:26:20... Is it safe when it gets that bright ? Ie radiation stuff !Luminescence is not necessarily radioluminescence, yours is phosphorescence. [radioluminescent watch dials were used in the past, they do not need to be exposed to light to glow, phosphorescent types need to be exposed to light to glow ]