CREE XML XM-L T6 1200 LM LED Cycling Bike Bicycle HeadLight HeadLamp Zoomable with 2x Rechargeable Batteries Output bright can come to max 800-1200 lumens [lm] Internal wiring applies the high efficient booster circuit Waterproofing design;3-Modes Switch:Mode:High/Low/Strobe Zoom Technology: Adjusting zoom ring out to focus far away and in to zoom for large lighting area. Applications to Make Your Hands Free: Widely utilized for camping, fishing, hunting, riding etc.