BESTSUN 5000 Lumen 2X CREE XML U2 LED Cycling Bicycle Bike Light Lamp Headlight Headlamp Brand: SolarStorm; Brightest CREE XML U2 LED Cycling Bike Light Headlight Lamp Lamp Size:42mm(L) x 60mm(W) x 38mm(H) The lamp is made of High Quality Aluminum Alloy with Fine Anodized Surface Treatment and beautiful deep fins for excellent heat dissipation function. Internal wiring applies high efficient booster circuit utilize batteries in the largest extent Led Type: 2pcs High Power U2 led bulbs; Powered by 18650 Rechargeable Li-ion Batteries pack, max output brightness come to 5000Lumens.(Batteries pack and charger included) 4 Working Modes Waterproof LED Bike Lamp headlight Flashlight Torch, Durable, Light Weight, Fashionable, Small but Super Bright , very practical, perfect for Night Riding, Cycling, Camping, Traveling, Fishing, Hiking etc outdoor activities.