LED Lights Don't Melt Snow on Traffic Lights, Hiding Signals From DriversA huge swath of the country is getting snow and it's raised an unusual and potentially dangerous problem for motorists. Communities across the country are converting to LED traffic lights, but these lights don't emit heat, so snow doesn't melt like it would with a regular incandescent bulb. In some cases, Drivers then can't see the signals. During a snow storm last year, Lisa Richter of Oswego, Ill., had a green light and was turning left. But police say a driver in the oncoming lane blew through his red...