Various techniques are provided for implementing a lighting device (1100) with selectable output level switching. In one example, a lighting device includes a light source (1115), a controller (1220) adapted to provide one or more signals to control the operation of the light source, a power terminal adapted to receive a power source, and a tailcap assembly (1160). The tailcap assembly includes a tailcap (1190), a push button (1191), and a washer (1170) disposed in the tailcap. The washer includes at least one arm (1171) adapted to be pushed against a surface to selectively connect the controller to the power terminal in response to a manipulation of the tailcap assembly.