Abstract: A switch for use in a flashlight assembly including a tubular body for containing or receiving a power source such as at least one battery. A light assembly including a light source coupled to one end of the body, and a switch assembly closing an opposite end of the body and moveable about a longitudinal axis of the body between at least a first position for placing the light source in electrical continuity with the power source and a second position breaking the electrical continuity between the light source and the power source. The switch includes a tubular housing detachably received in the opposite end of the body and having a detent extending inwardly from an inner surface thereof. The housing concentrically receives a neck portion of an end cap which closes the housing and forms one end of the flashlight. A pair of grooves, one on each side of a cantilevered spring in the neck portion, accepts the detent extending from the housing.