I have a dimmable ceiling light fixture in the Dining room. I put in CFL bulbs a few months ago. It all seems to work fine, no problem. I went to a hardware store yesterday and saw that there were CFL bulbs that were labeled as "dimmable". They were ~$10 for a bulb that puts out light equivalent to 100 W incandescent bulb.
What's the difference between a dimmable and a regular CFL bulb? Do I really need a dimmable one? My regular CFL bulb seems to work fine right now.