Beware of Uv!! Uv Detector Beads With Swarovski Cell Phone Strap Blue Northan Light
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Informative. Its good to check with this and then look through your areas UV index. I get dark colors so that would be a UV reading of 6-8 which means you shouldnt be in the sun longer than 15 minutes, longer than that and you can get skin damage. Under a tree it gets light so i assume the trees block uvs.