NEC has developed wireless cameras that are powered by fluorescent tubes. You just put the ring-shaped component around a bulb and you're good to go. The device "uses electromagnetic induction in order to obtain power by using the magnetic field generated by the AC source in the fluorescent light." Pretty impressive as long as you keep the lights on all the time. Which I learned is key to shooting good video anyways. Let's just say the last sex tape I made was three minutes of complete darkness. You can still hear the action though. It sounds a lot like a woman making fun of my penis for three minutes while I cry into a pillow.
Fluorescent light powers camera [coolestgadgets]