The Luxstat ON/OFF Control Module by Servodan provides multilevel ON/OFF daylight harvesting control by using a unique Open Loop control algorithm. The lights turn off when there is enough daylight, and they turn on when there is not enough daylight. Instead of measuring the light already inside of an area, this module measures the amount of daylight entering an area. During installation, lighting levels (without artificial lighting) are measured at task height for each of the 3 zones. When daylight is adequate, the controller switches lighting off. When daylight is below the desired level, the control module switches lighting back on. The ON and OFF delays for each channel are individually adjustable. The Luxstat ON/OFF Control Module is part of a daylight harvesting system that includes the Luxstat Light Sensor and the Luxstat Power Pack. The control module can work with occupancy sensors and manual wall switches to provide a diverse lighting solution for classrooms and meeting rooms.