Abstract: A security switch system including a power supply; a first electrical contact switch; a second electrical contact switch; an electrical flash unit having a flash circuit including a flash emitting device that emits a flash of light of sufficient intensity to temporarily impair the vision of a viewer; and a switching relay having first and second alternating current switching contacts installable in series within the main alternating current power input to a building. Actuation of either or both the first and second electrical contact switch causes the flash unit to emit a blinding flash of light while the switching relay simultaneously disconnects all power to the building including the ambient lights. The robber is thus exposed to a high intensity flash of light while being simultaneously plunged into a dark environment.