Make a LED Light Panel from a Brownie Pan | Make:

Opinions are mixed on LED lighting, but anyone who has ever done location work won’t be able to deny their utility — they’re lightweight, they have very low power draw, and they generate very little heat. They’re an excellent tool to have in a one-man band style of shooting. They’re also expensive. But now, with the proliferation of LED lighting kits for home use, you can build a very good equivalent to $500 off-the-shelf products for under $100. More importantly, if you’re careful you’ll come away with a project that looks good — and won’t scream, “I built this in a shed!” — and that might be handy, depending on who your clients are.