The Eco Smart Silvair DALI panel is integrated with the DALI Smart Sensor. It can be parameterised and grouped via the DALI system. PIR Sensor design, Automatic Lights on when people in the room. Turn off lights if people leave the area. Daylight Harvesting is one of the most advanced techniques used in sustainable lighting designs for contemporary buildings. It automatically dims or adjusts the brightness of light in response to the amount of natural light available in a space. Utilizing natural daylight coming through the windows or skylights minimizes the amount of energy used in artificial lighting.