Narrator: Opened in 1947, Dillon Gymnasium once served as home to nearly all varsity athletics at Princeton University. Today, Dillon remains the site of NCAA wrestling and volleyball matches, and functions as base for the campus recreation program. Lighting in three areas, the four-court main gym, a multi-purpose room, and a group fitness room was upgraded to LED in 2012 as part of Princeton's commitment to reduce energy consumption to 1990 levels by the year 2020.
William Evans, Electrical Engineer, Princeton University: A gymnasium light installation in our Dillon Gym includes 111 light fixtures, which have effectively replaced CFL lights. The high bay lights include a full Lutron EcoSystem with Quantum Interface Panel.
Narrator: LED lighting solutions chosen for Dillon would need to meet recreational uses and satisfy NCAA criteria.
William Evans: For our gymnasium, we needed a source that was not too glaring. And so we ended up working with the manufacturer to have them install a diffusion layer between the LEDs and the surface of the lens, which ended up making the project able to go ahead.
Narrator: Adapting the control system to meet Dillon's needs provided some challenges.
William Evans: Some of the challenges that we've experienced with control systems are the interoperability of the controls with the particular light fixture. We ended up working with the manufacturer to create a custom interface that allowed us to bring the controls from the light fixture into the EcoSystem that Lutron was supplying for us.
Narrator: The LED system installed in the main gym and two other spaces reduced overall power needed for lighting by more than 35%, resulting in annual energy savings of almost 67,000 kilowatt-hours.
William Evans: We reduced from 256 watts down to 180 watts for each fixture. But then in addition to that, once we installed the control system, we were able to reduce it down again by 80% during recreational times due to the occupancy sensors that we employed throughout the gym.
Narrator: The task-tuned controls that operate during recreational hours in the main gym including dimming controls and occupancy sensors are estimated to reduce annual energy use by an additional 42,200 kilowatt-hours, for a total reduction in energy of more than 100,000 kilowatt-hours per year.