ALP DURMUS, PhD, is an assistant professor in the Department of Architectural Engineering at the Pennsylvania State University. He completed his PhD at the University of Sydney, Australia before moving to the U.S. to join Pacific Northwest National Laboratory (PNNL) as a postdoctoral researcher and later senior associate lighting research scientist. Durmus later joined Penn State's AE department as a professor in architectural lighting. His research and teaching interests are color science, lighting design, visual perception, adaptive lighting systems, energy efficiency, light pollution, circadian photobiology, and image quality assessment.