For safe night riding, traffic research shows that cyclists should present five reflective or powered light sources to drivers approaching from behind. Start with a good tail light.  The tail lights we offer are visible from a mile or more, are lightweight thanks to LED light technology, and many have a variety of mounting options - add a small bike light to your helmet for two powered light sources! Check out the Planet Bike lights, from the nickel-sized, fit-anywhere Spok to the 4th of July-worthy Superflash with its powerful strobe LED lights.