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Low-Energy Daylight-Matching LED Luminaire for Improved Health Outcomes:


American Society of Interior Designers Foundation

Principal Investigator(s):

Dr. Eugenia Victoria Ellis, AIA

Associate Professor, Civil, Architectural and Environmental Engineering, College of Engineering

Architecture + Interiors, Antoinette Westphal College of Media Arts and Design


Dr. Donald L. McEachron, Teaching Professor, School of Biomedical Engineering & Health Systems

Dr. Elizabeth W. Gonzalez, Associate Professor, Department Chair of Doctoral Nursing Program

IExE Cluster:

Energy-Effective Design


Funded by the American Society of Interior Designers Foundation and the Green Building Alliance of Pennsylvania, this project is a collaborative effort between Drexel University and St. Francis Country House, a Catholic Health Care Services facility of the Archdiocese of Philadelphia. We are designing a low-energy automated LED daylight-matching luminaire to improve human health and wellbeing. By mimicking daylight using light sources that match natural lighting levels and color temperature throughout the day, we hope to synchronize natural cycles of the human body. Both wavelength and timing are the most important factors for biological effect.   This energy efficient lighting program for 24 hour/7 day per week facilities will transform institutional energy use and demonstrate a more energy-conserving model for indoor illumination.