Pro 4200 Enduro Remote Front Bike Light. With a 4200 lumen output, you'll be sure to see every trail line, root, rut or rock with relative ease. But sometimes you don't need max light output and you need to save your 8 Cell Li-ion battery's life for more technical terrain, in which case NiteRider® has you covered with an ergonomically friendly remote switch allowing you to cycle through the four steady light modes, two steady flashes and S.O.S.