DULEX CREE Q5 LED Flashlight Torch Bike Headlight With 360&deg;Rotation Flashlight Mount Holder Dulex 300lm CREE Q5 LED Flashlight Torch Bike Headlight,Sports Mountain Bicycle Headlight With 360Rotation Flashlight Mount Holder The light output is very brightwith just 1 AA battery. The beam can be focused to be larger or smaller, by simply turning the front lens.