The exception is my work room, which currently has a 4ft 36w fluorescent tube. I'd like to replace that, it's on for several hours most days, but it isn't as simple as the bulbs because the fluorescent fitting has a high-voltage starter, and CFLs don't need that. As I understand it there are two ways to do this - one is to rewire the fitting to bypass the ballast and starter, the other is to replace the fitting entirely and put up one designed for CFL from the outset. Fortunately the fitting can be taken down fairly easily - it hangs on chains a foot or so below the ceiling and can be unplugged - so either wouldn't be especially difficult.
Anyone done any of this, and have any information about the pros and cons? In particular, what's the service life of these things - will the cost of replacements outweigh the energy savings?