Onedayshop 5000 Lumen 2x Cree XML U2 LED Cycling Bicycle Bike Light Lamp Headlight Headlamp Super Bright Bicycle Flashlight Headlamp Output bright can come to max 5000 lumen. Super bright bike/ Bicycle Headlight with U2 led bulb. Internal wiring applies high efficient booster circuit utilize batteries in the largest extent. Perfect fit for outdoor sports, such as camping, traveling, hiking. Waterproofing design,Easy to install and use.