Case Study Two Union Square Parking Garage Tawny

Case Study: Two Union Square Parking Garage Tawny Bates | May 20, 2014

Project Profile 2

2 Union Square Parking Garage lighting retrofit • 56 Story, 1, 126, 428 sf Class A+ office space • 5 -story parking garage • 389, 860 sf of parking • 913 parking spaces of 3 3

Baseline conditions • 329 fixtures, 150 watt HPS • Lighting on 24 hrs/day Energy use per year: 388, 933 k. Wh 4 4

Scope of Lighting Retrofit • HPS fixtures replaced with 48 Watt LED fixtures • New fixture mounted occupancy Sensors • Garage unoccupied 4560% of the time 5 5

Scope of Lighting Retrofit • New lighting layoutsingle middle row fixtures replaced with two side rows of LED fixtures • Fixture count grew from 329 to 534 • Wattage reduced by 53% 6 6

New Lighting • Total project savings: 268, 922 k. Wh/year • Total Incentive: $68, 037 • Light levels are higher and visibility is improved 7 7

Phase II (coming soon): Ramps & Loading Docks • 87 Existing Fixtures- 150 watt HPS • 48 Watt LEDs will replace existing fixtures • Replacement will be one-for-one (no change in fixture count) • Fixture mounted occupancy sensors will be included • Expected Savings: 104, 868 k. Wh/year • Expected Incentive: $26, 532 • Light levels and visibility will improve 8 8

Lessons Learned 1. Consult with your EMA early. 2. Consider installing sample fixtures to evaluate color, visibility, light distribution, etc. 3. If lighting configuration is changing, consider a sample configuration before committing to a final design. 9 9

Thank You Questions? Please call an Energy Advisor at 206. 684. 3800 10