The Light and Motion Urban 500 bike light provides 500 Lumens of light for excellent vision and safety during nighttime commutes. The light has high medium low and flash settings. Battery life is 1.5 hours on the high setting 3 hours on the medium 6 hours on the low and 18 hours on the flash. The battery is also USB rechargeable making it environmentally friendly and very convenient. This light comes with a bar mount and it can also be mounted on a helmet.