This bag doesn't reflect light -it produces its own light! The secret is electro luminescent wire and batteries. Ladyada and Becky Stern used the wire to make a Tron-flavored messenger bag. Once you get the technique down, you can use electro luminescent wire to spice up any clothing or fabric items. Complete instruction and a video will show you how. Link -via Lifehacker
El Wire is all over Burning Man. It's fairly cheap, as psychedelic lighting goes, and easy to work with. Google around and you can find some fun uses for it.
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