A sensor-less LED dimming system based on daylight harvesting with BIPV systems Yoo, Seunghwan ; Kim, Jonghun ; Jang, Cheol-Yong ; Jeong, Hakgeun Abstract Publication: Optics Express Pub Date: January 2014 DOI: 10.1364/OE.22.00A132 Bibcode: 2014OExpr..22A.132Y