I changed my whole place over to CFLs...saw a better-than $40.00 drop in the electric bill the first month I was at/near 99.999% (refrigerator and oven bulb are still incadescent).
The front door lamps (26Watt/100Watt equivelant) are on an 8P-4A timer and have both been working for over 3 years @ 8 hr/day, 7 days/week...(I date each CFL, with a Sharpie, when they 1st go into service), I have a pair of 23 watt CFL spirals in can-fixtures pointing into the shower/tub area, 4 - 13watt/60Watt equive CFL-spirals in the fixture above the bathroom sink, single 13watt/60watt equives spirals, in the 2 bedrooms, a three-way CFL spiral in the living room, a 23watt/100watt equive circular by the front-door closet, a 23watt/100watt equive over the kitchen sink, 3 - 16watt/100watt equives in the kitchen/dining room lamp/fan unit and in the basement, there are 4 - 26watt/100watt equive circulars...and the garage has a massive 45watt/200watt equive spiral in it.
And they all (even the ones outdoor) light up and within 1-2 minutes, full lightage...no problems with "yellow" or sub-white light.
And the best part?
I got the 23watt units about 5 years ago...they're GE-brand, and I picked 'em up at a grocery store in Eau Claire for a buck a piece. I bought four cases with 8 bulbs per case.
I'm lighting right and lovin' it.