Alldaymall H-920 Xm-L U2 Led 2800 Lumen Bike Light Headlight Headlamps 2 in 1 functions: Bicycle light + Head Light 2U2 LED, output bright can come to max 2800 lumens Power source - 418650 Battery Pack 4 MODES, a top-level equipment for cycling player or working in attics, under vehicles etc.