Abstract: A door latch position detection system incorporating light switching capability and a backup timer includes a relay that is used to switch on the storage unit lighting powered by line voltage. The system includes an AC to DC converter that converts and filters the line voltage to low voltage DC power. The low voltage is fed to a reed switch within a switch housing attached to the overhead door track. When the reed switch that controls the storage unit lighting is closed by withdrawal of the bolt from the track aperture, a low voltage power signal is sent through a normally-on switch to the coil of the relay, thereby closing the relay contacts and turning on the storage unit lights. A timer shuts off the current to the relay after a set period. The present invention may also be utilized in a garage or closet to conserve energy.