Gonex&reg; 360&deg; Rotating 2x Cree XM-L T6 2800lm 4-Mode Cycling Bicycle Bike Light Lamp White Headlight The 2 ultra bright America CREE XM-L T6 LED, color temperature of 5000K, the highest luminous flux of 2800 lumens, designed specifically for cycling and mountaineering lovers. Power: the battery pack with capacity of 6400mAh (4 x 18650), 2 and 2 on design, to provide power, backed by powerful; IC 3 files dimming circuit. Constant current, always is a kind of high brightness, no electricity will go out, and unlike step-down circuit will slowly go dark. 360 degree rotating lamp holder assembly and disassemble is more convenient, firm, let you ride more secure.