If you were in California, the higher tier rates for most are more than $0.30 per kwhhr.
In that case, the economic rationale for adopting CFL's in CA is 3x as compelling. $16.625 of savings a year (more than covering the cost of a $5 CFL) on the basis of using a 26W CFL in place of a 100W incandescent for 2 hours a day. It's not a huge amount, but most people use more than 1 bulb in their homes, and most light bulbs are on for more than 2 hours a day. If you can stand the illumination provided by CFL's, it's a painless way to save a few hundred bucks a year on power costs.