htt://www.topbulb.com/find/energy_saving_light_bulbs.asp

Fluorescent light bulbs

Fluorescent light bulbs save more energy then standard light bulbs by 70 percent. Lighting uses roughly 10 to 20 percent of the energy in commecial buildings. By using the fluorescent light bulb you will be reducing that percentage.

So therefore,

A 9w compacct fluorescent light bulb is the same as using a 40w standard light bulb

A 13w is the same as 60w

And a 23w is the same as a 100w.

By that information I came across proves that you can save energy by switching to Fluorescent bulbs. I know my family does because we use them ourselves.