Sat May 01 2010, 23:32 by 
KSDK -- They save energy, but do some newer model traffic lights also have a hazardous downside?
Money and energy saving L.E.D. traffic lights use 90 percent less energy than traditional traffic lights.
David Wrone, a spokesman for St. Louis County Highways and Traffic
says L.E.D. traffic signals mean big cost savings county-wide, from
manpower, to energy bills, to the cost of light bulbs.
"The average L.E.D. bulb is changed every ten years, and the old bulbs, we changed them out about once a year," says Wrone.
But the newer L.E.D. signals don't produce enough heat to melt snow off their lenses.
That's become an issue recently in places to our north where new signals have become crusted over in winter storms.
Read More
Money and energy saving L.E.D. traffic lights use 90 percent less energy than traditional traffic lights.
David Wrone, a spokesman for St. Louis County Highways and Traffic
says L.E.D. traffic signals mean big cost savings county-wide, from
manpower, to energy bills, to the cost of light bulbs.
"The average L.E.D. bulb is changed every ten years, and the old bulbs, we changed them out about once a year," says Wrone.
But the newer L.E.D. signals don't produce enough heat to melt snow off their lenses.
That's become an issue recently in places to our north where new signals have become crusted over in winter storms.
Read More
