Front Light for Brompton Recharge 2500mAh 550 LumensFront light + lamp holder Designed for brompton, light does not interfere with the brakes and front pockets. The lamp holder weighs only 13g: the bracket is machined in a CNC process, and the strength is greatly increased, and the weight is not lost. The brightness of the lamp is designed to be 550LM (measured data, not false), and the battery is 2500MAH. It finds the most suitable match in terms of battery life, heat dissipation, volume and weight.