the cold makes my sacs feel sterile too . roll on spring and summer time . i do not cherish the winterPhillips all the way.
I heard something like that, that first you must let them run for a while before switching off then first switch off has to be cooled totally before back on again.
When it blew, it blew the breaker switch which turned all the other lights off. I couldnt be arsed disconnecting the other cmh bulb, so some hours life lost on that one too when it booted back up warm.
Have a good one, I best get back up there to insulate the new tent more otherwise these pollen sacks will all be sterile.