You saw Batman Begins, you’ve now seen The Dark Knight, and now go on admit it, you want one of those mega spotlights with which Commissioner Gordon summons the help of the Caped Crusader. But you don’t have a gigawatt three phase power supply, all you have is a measly little 5V USB… don’t despair, that’s plenty to work with, and if you follow this instructable you’ll be casting the most wicked bat shaped shadows all over your bedroom, living room and office walls.