Abstract: Controls for lights in a room with a swinging door for entry into and exit from the room, providing a main circuit for the lights, including a main switch normally closed to close the circuit, a time delay relay adapted, when energized, to hold the main switch in closed position for a preset time period and then shift the same to its open position, and a relay circuit, including a featured master switch of push button type having its push button in the form of a latch bolt, with this switch being mounted on the door so that the push button may serve as a latch bolt by being projectible into and retractible from an associated catch on the door jamb inside the room, with the master switch being closed to close the relay circuit when the latch bolt is retracted, and being open to open the relay circuit when the latch bolt is projected.