The city of Philadelphia plans to replace 55,000 incandescent traffic signals with LEDs in two years, reports the Philadelphia Inquirer, citing city officials.
According to the article, the plan is to switch all the yellow and green traffic lights at the 2,800 intersections in the city to energy-efficient LEDs, as the red lights were already switched to LEDs about 10 years ago. The city would use federal stimulus money and state-required energy conservation encouraging subsidies to accomplish the project, city officials said.
The new lights will save about 9 million W a year -- enough electricity to power more than 1,000 homes. The city's annual electric cost will go down about $1 million, a city official said.
