Sep 2, 2011 / ENERGY GLOBE Award
Project presentation - "A glowing city thanks to LEDs"
Money savings and simultaneous environmental conservation were the motto of the city of Ann Arbor (Michigan, USA) over the past two years as they replaced all traffic lights and street lights in the downtown with modern LED lamps.
This saves the city government some $100.000 annually, or 50% of the lighting costs. The advantage of these LEDs is that they consume only 56 watts and have a lifetime of ten years; the old lamps drew 120 watts and had to be replaced after two years.
Thus the investment for retrofitting ($630,000) amortizes in only 4.4 years. In addition to the city budget, the environment profits from the project due to a reduction of 2.2 tons of CO2 emissions annually.
Due to its huge success, the project is to be extended: In addition to the 2000 streetlights belonging to the city, Ann Arbor has 5000 others that are operated by DTE Energy, whereby the city pays for these.
Ann Arbor is now considering purchasing these street lights and retrofitting them with LEDs – die perfect way to combine reductions in the budget and in CO2 emissions.
Find more information: www.annarbor.com