On September 1st 2011, USIGT, in conjunction with D5 Enterprises, retrofitted the existing Metal Halide (MH) and High Pressure Sodium (HPS) parking lot site lighting fixtures, HPS recessed soffit fixtures, HPS basement fixtures and the interior common area T12 fluorescent fixtures (to T8) at The Atrium Building in Fresno, CA with Xenon Ultra Constant Discharge (Xenon) bulbs/ballasts. The project at the facility consisted of retrofitting 14 400 Watt HPS parking lot fixtures and 10 400 Watt MH flood lights with 120 Watt Xenon configurations. The 100 Watt HPS recessed fixtures were retrofitted with 40 Watt Xenon and the 150 Watt HPS basement fixtures were upgraded to 60 Watt Xenon. Retrofit time per fixture was less than one hour per fixture with standard hand tools and can be performed by any electrician or maintenance personnel. A ladder truck was needed for the parking lot fixtures that are mounted +/- 20’ above finish grade. Parking lot circuits were 277 volt.
The original calculated lighting load was 155.7kW. This retrofit project reduced the load to 64.3kW, which is an 59% decrease in power required for the parking lot, site lighting, basement and common area lighting. The parking lot wattage was reduced by 66%. Foot-candle measurements and light dispersion was similar to the other fixtures located in the same parking lot that were not retrofitted. The high efficiency of Xenon technology produces an increased ratio of lumens per watt (108 Lm/W) allowing for substantial reductions in wattage required per fixture.. The outstanding color rendering of Xenon technology increases the effective light and more closely resembles actual daylight conditions.
All comparative measurements and photographs were taken at identical times of day and from the same physical location.