Axiom Lazer 600 Lumen Cree LED Bicycle Headlight High-brightness Cree XM-L (T6) LED closely resembles daylight Ultra-bright 600 lumen output for excellent visibility High-precision optical lens enhances clarity and focus Runtimes: up to 2 hours Overdrive (600 lumens), 3 hours High Beam (420 lumens), up to 4 hours 20 min Medium (280 lumens), up to 9 hours Low Beam (150 lumens), up to 6 hours 50 min Flashing, up to 6 hours 20 min Strobe