A crash course in changing the world.
Many towns and cities are saving money on their power bills by changing from incandescent light bulbs to light-emitting diode (LED) lights. These lights can be used in traffic signals, crosswalk signs, and even holiday displays.
LED lights have an extremely long life span and use much less energy than incandescent bulbs. Switching to LED lighting can save 40 to 70 percent of the electricity a city uses for certain lights in parking garages, parking lots, outdoor parks, and on streets.
The cities of Raleigh, N.C., and Ann Arbor, Mich., are taking part in LED City, a program designed to help cities use LED lighting to save energy, protect the environment, and lower costs.
The ball that drops in Times Square on New Year’s Eve in New York City was changed over in 2009 to LED lighting. The 9,576 LED lights replaced the 600 incandescent bulbs used in the previous ball. The new ball is more than twice as bright as the old one, but it uses only as much energy per hour as two home ovens.