Stan Walerczyk is principal of Lighting Wizards and chair of the Human Centric Lighting Society and Committee. His 26 years lighting experience includes distribution, maintenance, retrofit contracting, 3rd party review, consulting, design, luminaire design, policy making and research. He assisted the DOE research on spectrally enhanced lighting. He has written over 100 articles and white papers and presented close to 1000 seminars. He is currently on the IES Spectral Effects and Energy Management Committees.