Aeroway&reg; 4500 Lumen 3X CREE XML U2 LED Cycling Bicycle Bike Light Lamp Headlight Headlamp-Black Thin Super brigt LED bicycle light owns with 3xCREE XM-L U2 LED,its output brightness is 5000LM. Applies the high efficient booster circuit to the internal wiring,can utilize the batteries to a maximum extent. Intelligent circuit control,there are 4lighting modes for your option. Timely battery indicator helps you master battery condition. Two ears of the light is equipped with a cooling device,helpful for the heat dissipation.