Most Powerful 1200 Lumen Best Chromatic French Racing Blue High Low Beam Cree XM-L U2 LED Rechargeable Li-ION Battery Bicycle Light Headlight Flashlight Black Highest Quality Aircraft Aluminum Alloy Waterproof Easy to Install Improves Safety Dark Rides Snowboarding SkiingDaytime Rides Road Mountain Touring Hybrid Commuter City Comfort Track and Trekking Bike Compatible Caving Climbing New model more powerfull updated circuitry . High and low bean including stobe mode Easy installation no tools required. Brightens the darkest roads instantly improves safety and visibility. Up To 3 hours on high (2400 lumens) and 6 Hours on Low(850 lumens) strobe 2400 lumens Aluminum heat sink to dissipate heat. Li-Ion battery with charger. Daytime Rides Road Mountain Touring Hybrid Commuter City Comfort Track and Trekking Bike Compatible Caving Climbing