The moon x power 850 front light front light steps it up with not one but two xml leds that give off double the mount of lumen so that you can see where you39re going whether it39s on the trails or on the roads as well as featuring a precision optical lens the light has 7 different modes to choose from including an sos mode which can be seen from miles you know just in case the light uses a rechargeable lithium ion battery that can be plugged into a usb port for easy charg