Abstract: An example weapon mounted light comprises: a housing containing a power source; a light head assembly carried by the housing, the light head assembly includes a light emitter; a rocker switch assembly that serves as an ON/OFF actuator for the light emitter carried by the light head assembly; and a back cover. A portion of the rocker switch assembly is received within a circular opening in a back end of the housing and held there by the back cover, the rocker switch assembly can be rotated clockwise and counterclockwise to actuate the light emitter. In some implementations, the weapon mounted light includes a clamping arrangement comprising a fixed clamp member that extends outwardly from the housing and a movable clamp member which is moveable toward and away from the fixed clamp member by a clamp screw.