Comment Re:Hmm... (Score 1) 839
Aside from the other stupidity already being commented on, this is purely a case of bad design in the LED traffic signals. LEDs are ~4x more efficient than incandescents, but they're still far from perfect, and they still give off a *lot* of heat.
http://en.wikipedia.org/wiki/Luminous_efficacy
I've designed and built many lamps using high power/high brightness LEDs. Any time you design a high power LED lamp you have to heat-sink every single LED otherwise it will burn out. The obvious solution here is to run heatpipes from the sinks at the back of the LEDs to the lamp housing and/or front lens. There's no need to add a separate heater, every electronic device *is* a heater.