[GingisK]

LEDs are solid state devices. If you do not conduct heat away from them they burn out. The diode junction literally melts or fractures.

You probably live someplace that doesn't stack ice upon your car during the winter.

[discostu]

Melting isn’t overheating. And, as I said, that would be a problem with the socket, or specifically what’s around the socket. If your socket is making your LEDs melt faster than incandescent burn out, then your socket is a fire hazard. Replace it with something that doesn’t suck.