I have been using regular cfl flood lights outside for a little over 4 years now. We don't get -25 cold around here, -10 C is about the worst it's gotten over those years. I'd guess maybe 2 out of 8 bulbs are the original ones I installed. Their lives seem to be much shorter when placed in a harsher environment. Inside I think I've lost 2 bulbs in 4 years. They are lasting way longer then the old bulbs but I'm doubting that I'll get 10000 hours out of them.
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