hi I have fan built led for my part they worked fine at -30 degres, but it can be more cooler ,,, so far so good
I will put the link for u to tcheck up
they said their product go to -40
http://www.aliexpress.com/item/2015-NEW-Super-Bright-3600lm-Bulb-6000k-Car-LED-Headlight-9005-9006-model-ip68-Car-Light/32278694851.html
I putted these for my low beam and they are canbus, no fail to date, some said that they dont need canbus but I tried HID they wont light up without capacitor.
n.b they can be switch to go 9005 too.