In the law of unintended consequences segment we have this gem! You can't make this stuff up.
Click here: Energy Saving LED Stoplights Freeze Over
What is a little death and mayhem when you are being energy efficient and saving the environment? In fact, isn't that and envirnowhacko's goal? To kill as many humans as possible thereby saving their deity the earth?
For every decision there are consequences, and all factors should be weighed before just assuming that an environmentally sound decision is a good decision.