The Blackburn Dayblazer 65 Rear Bike Light has two LEDs pumping out 65 lumens of power, 270 degrees of visibility this light is focused on safety, so you can focus on your ride. Also, because of the narrow profile of the unique mounting bracket, the DAYBLAZER 65 tail light can be mounted to just about anything you can think of from round or aero seat posts, to seat stays, to a rear rack, or your back pack.