I replaced almost every bulb in my house with these compact fluorescent bulbs. While they are quite pricey, I thought it would even out in the long run since they were supposed to last so much longer than conventional bulbs and also lower my electric bill. I did notice a slight difference in the electric bill, but these bulbs certainly don't last any longer than the conventional bulbs. In fact, half of them have burned out in less than a year! They weren't on dimmer switches either, just regular light fixtures. I also don't like that they take so long to go to full brightness. I have no window in my bathroom and with these bulbs, it was like having only a night-light on for several minutes until they warmed up. Just did not like them at all.