These CFL bulbs do not get frequent cycling, but they are mounted downward at about a 35 degree. The bulbs probably average two hours between power cycles. I even bought new light fixtures in hopes the bulbs would last longer. The bulbs last about 2 to 3 months longer than before. I suppose I can try the Home Depot brand, but constant trips to replace bulbs isn't saving me any money.

I have CFLs mounted upside down in my bathroom and they haven't burned out in more than two years. I also have CFLs at my garage entry door that get turned on and off constantly and they are at least four years old.