Seems to me that LED's do not have a long life, (quite the opposite of what we are told from the manufactures) I was following a propane truck the other day half of the board in each of his LED taillights were out, going around town I see the same with the LED converted traffic lights.
As someone was stating about the color temperature, I have real hard time with the white LED's, my eyes simply do not like them. Slightly off topic, those blue Christmas and emergency vehicle LED's are even worse, apparently we humans can't see the a certain part of spectrum of the blue they admit, and that is why they look blurry.