I do love the story of some city replacing all of their incandescent street lights with LEDs. The energy cost savings became negated when it was determined the street lights iced over during the winter months, making them effectively useless. Seems the warmth of the incandescent bulbs kept the ice melted away from the fixtures.
I imagine the solution they comes up with to melt ice off the fixtures for the LED bulbs is going to cost the city much more in terms of engineering costs and energy costs for the solution than if they had just stayed with the incandescent bulbs.
Ahhh, the Law of Unintended Consequences is proved once again.
Semi truck operators experience the same problem.
Aww, no problem. They'll just install a resistive heater element in parallel with each LED bulb.
Oh, wait....