Set-point control of LED luminaires for daylight harvesting

Modern lighting systems can achieve energy savings through various lighting control strategies such as daylight harvesting and occupancy detection while maintaining desired light levels in the environment. In this paper, a model-based feedback control algorithm is presented to achieve desired illuminance levels with the daylight treated as a disturbance term. The control objective is to improve lighting energy efficiency through feedback control of supplemental lighting; hence maximizing the use of daylight while achieving the desired light levels at the target points.