A tactical illuminator has a first switch for providing a lesser amount of visible light on an area of interest than a second switch. The first switch being in close proximity to the second switch to allow an operator to quickly and easily move his finger or thumb from the first switch to the second switch when a need for greater light is encountered. A tactical illuminator has a rotatable switch moveable from a first position that provides a lower level of light output to a second position that provides a greater level of light output. The operator actuating the switch by sliding his finger or thumb parallel to a longitudinal axis of a weapon barrel.