The Magic of Glowsticks: http://www.straightdope.com/classics/a2_397c.html
It is very interesting how Uncle Cecil states that the chemistry of the glowstick is the same (or highly similar) to the lightning bug. However, I understand there is other chemistry in play that allows the lightning to turn off its light AND reuse.
Last I read, we do not know how the lightning bug can do this. Do we still not know? Is it an American Cyanimde secret? Or, is it simply a chemical reaction that can easily be reversed? - Jinx