I have a 6v headlight and 6v mini-generator that I purchased from Wonderful Creations on eBay. The mini generator is like a secondary coil that can be used to power lights or accessories. The headlight is about 300 lumens, so not quite as super bright as some other lights, but it does reflect off traffic lights from a couple hundred feet. I had originally bought the light to be run off the white wire, but it started killing my engine at idle. The mini generator replaces the white wire as a magneto-driven power source. I paid $17 plus shipping for this light, and $25 plus shipping for the generator, altogether about $52. Wonderful Creations also has 12v lights and generators, as well as batteries and chargers that can be used in conjunction with the generator. I find that 6v is enough for my needs, because I live in the city.