I have 24 Cree BR30 5000K bulbs (60W equivalent, 9.5W LED) in recessed cans in the garage. I love them and only rarely turn on the fluorescent overheads now.
In a warm climate, you really can't beat fluorescent. But I'm in Michigan and this winter has been brutal. Got snowed in again today due to 24+ inch drifts. I really appreciate that the LEDs come on instantly at full brightness regardless of how cold it is in the garage. My 0F-rated T8 shop lights come on, but take many minutes to come up to full brightness in the cold. Same thing with the overhead HO fluorescents with new electronic ballasts.
I wouldn't think of LED as a payback sort of thing. To me the advantages have been:
- no change in performance across a wide temperature range; always instant on, always full brightness
- durable
- no RFI mucking up my radio reception
- long life, and the Cree bulbs have a 10 year warranty
I wish Cree would make some 100W equivalent BR30 or BR40 bulbs, since they've become my favorite LED bulbs and I figure that they know what they're doing since they're one of the two top high-power LED producers. Maybe that's why they've not done it yet: still too many thermal concerns for a bulb that could be produced at a homeowner-friendly price. Not hard to find 1100 lumen BR30 and 1600 lumen BR40, but they're pricier and given the heatsinking I've seen, I question their longevity in an airtight recessed fixture. I'm about to put some of the Kobi Electric 1600 lumen R40's in the garage to see if they last a while. Not willing to buy 24 of them yet.
I also have 9 Cree BR30 2700K 60W equivalents in the kitchen. And another ten or so throughout the house. Recessed lighting was popular when this house was built, and I'm tired of the CFL warm-up time and replacing them (especially the ones in the cathedral ceiling). So I have been replacing CFL BR30 with Cree BR30 LED each time a CFL dies.