Originally Posted by MacLorry
But LEDs do have a cold weather problem. Just check the specifications before you buy if you intend to use LED bulbs outside in cold climate. -22° F is fine for most people, but if you need -40° F you may be out of luck.
Feit for one makes a -40 LED bulb. Feit

Actually it's the electronics that drive the LED that get the temp spec. Personally I'd try what's available and see if it worked unless it was a PITA if it didn't. Components and circuits are spec'd at guaranteed, not typical.


The key elements in human thinking are not numbers but labels of fuzzy sets. -- L. Zadeh

Which explains a lot.