The Charge was designed with helmet rail mounting in mind, offering a lower lumen light output for close at hand administrative tasks when in the field. Versatile, smart and tough, the Charge (along with our other MPLS Helmet Lights) were created with our exclusive flexi-neck design allowing you to direct light where you need it, regardless of the angle of your helmet. Each Charge has a single white Maxbright LED that puts out a solid 55 lumens.