Like car lights, bike lights help you see where you're going at night but they are also a safety measure, needed to let drivers see you even more than for you to see them. Bike lights go on the front of mountain bikes and other types of bicycles.
Bike lights usually feature LED lamps but sometimes use brighter incandescent bulbs with rechargeable batteries. All are lightweight and easy to ride with, giving decent illumination and safety. Ride safe with bike lights.