Planet Bike Blaze 45 bike headlight Nichia 45 lumen Blaze LED provides steady and flashing modes Run times: 20 hrs (steady  45 lm) and up to 100 hrs (flashing - 45 lm) Side cut outs provide 180  of visibility Highly visible, even in daylight 2 AA batteries (included) Planet Bike Blaze 1/2-Watt LED Bicycle Light comes with helmet and QuickCam mounts and two AA batteries Nichia 1/2-watt LED bulb is several times brighter than a standard LED bulb Easy-to-use Quick Cam bracket mount and helmet mount adjust or remove without tools With flashing and steady modes; light runs for up to 100 hours on two AA batteries Fits 25.4 to 31.8 mm handlebars; backed by a limited lifetime warranty