NiteRider Lumina 750 Bike Light 750 lumens for optimal visibility Run time: 1:30HR High-750, 3:00HR Med-350, 5:30HR Low-200, 18:00HR Walk-40 Light levels, 4 steady/1 flash Includes LED headlamp, internal Li-lon battery, USB charging cable, helmet mount, and handlebar mount-fits up to 31.8mm Weight: 172 grams