Something under three years ago I bought a dozen fluorescent bulbs to replace the incandescent bulbs in all the household fixtures. (except the chandeliers that use shaped bulbs). I've bought another half-dozen since. The first of the original batch went in less than nine months, and the last of the original batch blew today. Of the eighteen or so I've bought, three remain functional.
Verdict: the experiment is a total failure. They don't last a single day longer than incandescent, and even when they worked, I had to buy or position supplemental lamps to be able to read, write, or do any fine work without glasses. The total dollar cost was never amortized because the claimed "longer life" didn't hold true. Given the much greater manufacturing cost, the energy/carbon difference was never amortized, either, and the environmental impact is also a net loss, given that the fluorescent bulbs contain mercury.
Moral: Even if you believe in Global Warming, don't leap on every bandwagon that claims to be a solution without extensive study- which wasn't really done with the Compact Fluorescent Light. It was an example of what is called "politician's logic"- something must be done; this is something, therefore we must do it. You think I jest? Congress has outlawed the incandescent bulb, beginning 2014, and Bush signed it . This is a lesson for future such measures as well- even if actions of humankind have a significant lobal Warming impact, we must take the time to find out if the unintended consequences of our "solutions" won't make things worse rather than better.