Not to veer too far off topic, but I was hunting for replacement CFL's for my kitchen overheads. I had located dimmable fluorescents and they worked fine with the dimmers I have. However, they exhibited horrendously short life. In service for less than three years and burning out within a month or two of each other. Original package claimed 23,000 hours of life. If I kept them on 24/7 they should last about 3 years, so not even close. Looking the other day, they now claim 4.3 year life at 3 hours per day or about 4,700 hours. The 4-pack of incandescents with the same life rating was selling for about the cost of ONE dimmable fluorescent. Wasn't a hard choice.