DETROIT – How many Ann Arbor city workers does it take to screw in a light bulb?

Soon, none.

Instead, they will be installing light-emitting diodes, or LEDs, to replace about 1,400 street lights.

The eco-friendly city about 30 miles west of Detroit says it will be the nation’s first to convert all downtown street lights to LED technology, which uses less than half the energy of traditional bulbs and could save the community $100,000 a year.

“LEDs pay for themselves in four years,” said Mayor John Hieftje, who announced the city’s plans this week as it joined Raleigh, N.C., and Toronto in the LED City initiative, an industry-government group working to evaluate, deploy and promote LED lighting.

“They provide the same light, but they last 10 years. We had to replace the old ones every two years.” [ Read more...]