energy-efficient traffic lights can't melt snow - solar energy traffic lights

Many U. S.
There are new energy-saving light bulbs in the city's traffic lights.
They use 90% less energy, last longer, and save money.
But since the new bulbs don't give off the heat, they don't melt the snow.
Dozens of car accidents were blamed on heavy snow, AP reported.
Covered traffic lights.
Police say if the lights are covered with snow, treat them like parking signs.