The Outdoor Contact Input Photosensor is a system accessory for Greengate lighting control systems. It allows control of lighting levels based on how much natural light is present and is intended for outdoor use. This system accessory is used in conjunction with a lighting control panel to switch circuits ON or OFF based on outdoor light levels. The Outdoor Contact Input Photosensor connects to the control panel low voltage switch inputs. The photosensor constantly monitors the level of sunlight and provides a signal to the lighting control panel when the light level crosses the switching threshold.