The Light and Motion Stella 500 Light puts out a whopping 500 lumens and lets you ride a lot longer, and safer, into the night. The Stella offers three settings and features a custom micro peened reflector to provide a smooth, even beam of light. A rechargeable two cell lithium ion battery powers the Stella, and it runs for 2. 5 hours on the highest setting, and up to 24 hours on the lowest setting. Light and Motion includes a tool free mounting system, and the light can be easily attached to your helmet or handlebars. The battery, power cord, helmetbike mount, and charger are all included with this light.