Blackburn Central 100 USB Front Bike Developed using the American National Standards Institute (ANSI) Flashlight Standard (FL-1) 3 LEDs project 50-100 lumens of bright light 180 of visibility Runtimes: 3.2 hours High (100 lumens), 7 hours Low (50 lumens), 21 hours Blackburn Strobe (50 lumens) Press the lens button to turn it on