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DIY Ring Light from Christmas LEDs | Make:
John writes "Did you run out and buy a big old string of white LED Christmas lights because you just knew that they were of the sweetest hackability? I know I did, and I'm going to build one of these right lights and keep it with my camera gear. You never know when your going to need a bit of fill light when doing a closeup, shooting a macro image, or just need somthing to make retroreflective things come alive." Link.