Re: Sprocket question.
Careful with LEDs for head lights. LEDs do not light the entire spectrum which is what enable them to have such a low power draw, but this also means that they don't "illuminate" things as well. LEDs are great for being seen, but not the best for seeing, a white LED head light won't give you as much visiblity as a standard bulb. Which is why you may see LED tail lights on cars and trucks, but not LED head lights.