A hybrid illumination method using both daylight and light-emitting diodes (LEDs) for indoor lighting is presented in this study. The daylight can be introduced into the indoor space by a panel-integration system. The daylight part and LEDs are combined within a specific luminaire that can provide uniform illumination. The LEDs can be turned on and dimmed through closed-loop control when the daylight illuminance is inadequate. We simulated the illumination and calculated the indoor lighting efficiency of our hybrid daylight and LED lighting system, and compared this with that of LED and fluorescent lighting systems. Simulation results show that the efficiency of the hybrid daylight/LED illumination method is better than that of LED and traditional lighting systems, under the same lighting conditions and lighting time; the method has hybrid lighting average energy savings of T5 66.28%, and that of the LEDs is 41.62%.
© 2014 Optical Society of America
Optical Design and Fabrication
Original Manuscript: November 28, 2013
Revised Manuscript: January 26, 2014
Manuscript Accepted: February 12, 2014
Published: March 19, 2014
Aiming Ge, Peng Qiu, Jinlin Cai, Wei Wang, and Junwei Wang, "Hybrid daylight/light-emitting diode illumination system for indoor lighting," Appl. Opt. 53, 1869-1873 (2014)