[elhigh]

Has anybody done the math on those things? IIRC they deliver about 70-75 lumens per watt.
I have some GE 26w CFs delivering 1750 lumens, that's about 67 lpw. You might get a savings, but don't be expecting much. Not saying it's a bad idea to switch - if you have hard-to-reach fixtures that are a big pain to change, the LED is probably a great choice just to get that chore out of the way for a few years. But if you're switching strictly for the savings, you might not see enough of one to experience a payback in the bulb's lifetime.

Cree and Philips both have lab results on LEDs generating over 200 lumens per watt, I'm holding out for a complete lamp that delivers at least 150 before I do a whole-house change. That should be worth the trouble.