"A household that invested $90 in changing 30 fixtures to CFLs would save $440 to $1,500 over the five-year life of the bulbs, depending on your cost of electricity. Look at your utility bill and imagine a 12 percent discount to estimate the savings."
FAQ: The End of the Light Bulb as We Know It - US News and World Report
And that was at energy prices from 3 years ago. Anyone who doesn't switch to CFLs are flushing money down the toilet, especially considering the broad spectrum they come in now.
If you're concerned about buying domestically:
Green Electrical Supply LLC. Energy Saving Compact Fluorescent Light Bulbs
Also check out:
U.S. Stuff Home- Made in USA Products, Assembled in USA Products, usstuff.com