Lights are required by law when riding after dark. You or your bicycle must have a white light visible at least 500 feet to the front, and a red light or reflector visible at least 500 feet to the rear. These are the minimum requirements. More powerful lights will make you more visible to others, and help you see road hazards. A rear light is more visible than a reflector. Front white reflectors are not visible to motor- ists entering from a side street and do not meet legal lighting requirements.