Cold Storage Facility LED Upgrade
Aetna Corp. conducted a lighting audit to evaluate a cold storage facility in Milton, Pennsylvania. The Aetna Corp. team carefully examined the company’s existing lighting system in their 1 million square foot facility and uncovered two areas of improvement—Weis had 455 Watts high pressure sodium (HPS) lights (yellow light) and they were running the lights 24 hours, seven days a week.
Total Project Cost: $900,000
Annual Energy Savings:$434,000
Annual HVAC Savings: $75,000
Utility Rebate: $350,000
Return on Investment:1.1 Years
With thousands of lighting fixtures throughout the facility, Aetna Corp.’s recommendation was to implement a cost-effective and energy-efficient program to significantly reduce costs. While open to an LED upgrade, the cold storage facility was initially apprehensive about having their lights on occupancy sensors. To help them make a data-based decision, Aetna Corp. installed data loggers throughout their cold storage facility to track movement. Over the course of a two-week period, the data loggers monitored activity and movement. The data showed that more than 80% of the facility had activity for only four hours per day. Their lights were running 20 more hours per day than they needed to—that’s 140 hours per week.
Aetna Corp. removed their existing 455 Watts high pressure sodium high bays and installed 163 Watts LED high bays with onboard sensors. Locations with the most activity were programmed for five minute on/off cycles and the low activity areas were programmed for 30 second on/off intervals.
Aetna removed their existing 455W high pressure sodium high bays and installed 163W LED high bays with onboard sensors. Locations with the most activity were programmed for five minute on/off cycles and the low activity areas were programmed for 30 second on/off intervals.