Lighting was provided by three hundred 750-watt metal halide acrylic domed high bays, which required costly annual relamping to maintain consistent illumination levels. The client initiated a project to update the lighting to solid-state light emitting diode (LED) systems with drivers and a new wireless lighting control system for dimming and daylight harvesting.
New 680-watt luminaires were installed on a ‘one-for-one’ replacement basis and interfaced with the new wireless control system. Lighting in all zones was designed to have a default operational setting of 40% power and light output to approximate the current lighting levels achieved with the 750-watt metal halide systems.
For tournament and special events, ‘Push of a button’ preprogrammed scenes allow adjustments to increase power and light output to 60%, 75% or 100%. Also, the system enables manual dimming for finetuning of lighting levels. The overall annual savings for the lighting, at design power and light output levels, was estimated to be an approximately 930,000 kWh consumption reduction, with lighting demand being reduced by 150 kW. However, during commissioning it was found that acceptable illumination levels were achieved with the ice rinks set at 25% power, the basketball and courts area set at 30% power and the running track / indoor soccer area set at 35% power. These adjustments are expected to increase savings potential by approximately 10% above estimated values, totaling over 1,000,000 kWh in reduced annual energy consumption.
This project won the Award of Merit for Energy and Environmental Design from the Illuminating Engineering Society (IES). Read the full story here.