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Great for.... KIDS. No practical use in the field but FUN. Come with three crystals that change shape and intensity of the light. If you think that this light with change colors on it''s own you are wrong. In order to see them you have to move it around. Wavelength change normally to fast for the human eye will than become visible. If you have kids that you take camping this is a gift for them. No practical use for you.

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Similar Products Used:

Mircolight II and III