Reelight: Battery-free bike lights based on a patented induction principle. Power is produced by magnets mounted in the spokes passing by a generator mounted on the front fork/rear stay. The safest and most convenient commuter solution ! The lights are fixed mounted, always on and cause no friction. Using no batteries Reelight is saving the environment tons of batteries. The new SL500 with the latest inversed LED technology gives maximum light distribution and visibility at all times. Years of safe riding in all weather conditions is guaranteed from using the best quality components presented in stylish Danish design.