The system consists of daylight sensors that actively measures the sunlight available at any point of time and sends the feedback to the controller. The lighting controller manages the daylight at the task level by switching on the required electric source to compensate for the reduction in daylight.
The system is commissioned to a given set point and when the daylight goes below that level led lights turn on and similarly the light turns off when the daylighting goes above the set point.
For example a system could be set for a set point of 300 lux and the controller can be used to change the set point in the increments or decrements of 100 lux. So on the higher side it could be 400 and 500 lux and on the lower side it could be 200 and 100 lux.
The lighting controller can control 20 amps circuits of lighting load. For higher load an electrical contactor to be used as shown below in Diagram
Manual Over ride
The lighting controller can be over ride by a master control switch as shown in diagram