71% Energy Savings in Parking Garage using High Efficiency LEDs
Annualized energy savings equivalent to 854 metric tons of GHGs reduced or 180 cars removed from the road
Asset Facts
Date Built 1982
Parking Spaces 1,800
Square Feet 300,000 Asset Type Parking Garage
Project Facts
Annual Energy Savings 1,238,825 kWh
Annual Energy Reduction 71%
Annual Cost Savings $114,914
Gross Investment $616,700 Rebates $48,726 Rebates as % of Total Project Cost 7.9 Net Investment $567,974 Net Payback 4.9 years
ROI: 20%
Challenge
Located in the Midwest region of the United States, this 300,000 ft2 urban mall stretches over four blocks. It was constructed in 1912, converted into a mall in 1982, and underwent upgrade renovations in 2004. The six-level above-ground parking lot was built in 1982 and lighting upgrades were implemented in the early 1990s. The garage provides parking for the adjoining retail mall.
Our Solution
The existing 986 lighting fixtures in the parking garage were 150 W metal halide low-bay fixtures. They were not controlled by dimmers or sensors and ran continuously throughout the day, throughout the year.
Replaced the metal halide lamps with 51 W LED dual sensing dimmable fixtures. The power required to run the fixtures greatly decreased while ensuring optimal light levels were maintained in the garage
Installed occupancy and daylight sensors. As a result, the new fixtures vary their light output depending on detected natural light levels and pedestrian and car traffic in the garage
Coordinated all rebate capture activities with the state utility to secure funding for 8% of the total project cost
Completed a consumption analysis was completed on the parking garage prior to and after the installation of the lighting and sensors to measure and verify the impact of the Solution.
Energy Savings 71%
New LED fixtures reduced wattage and the baseline demand of the garage by 65%
Installed lighting and daylight- and occupancysensors save about 1,238,825 kWh annually
Solution resulted in an overall, verified 71% reduction in the annual electricity consumption of the parking garage.
