HI. I don't mean to invade the thread with a tangent, but I was just pondering this. Have you seen those flashlights that you shake up to generate power? I wonder if there is some way to gut one of those to use as a bike light. Could there be some way to convert to motion of the bike into the necessary motion of the magnet? The beam on those isn't really that bright, I guess, but it could probably power some side and rear lights just for visability.