Disclosed are implementations of a switch actuator that can be attached to a switch device of a weapon mounted light and used, in conjunction with the switch device, to selectively actuate a light emitter of the weapon mounted light. An example switch actuator comprises: a base configured for attachment to the switch device; an actuator paddle offset from and positioned above the base; and an actuator arm connecting the actuator paddle to the base. The switch actuator is used to forwardly urge the switch device to place the switch device in a momentary ON position, and rotatably urge the switch device to place the switch device in a constant ON or OFF position.