If a fixture is rated for 60W, is it ok to install a CFL (Compact Fluorescent Lamp) that claims to give 100W of light for 23W of usage? There doesnt seem to be that much concrete info out there.
100W is just a manner of speaking meaning that your 23W CFL will give same luminous intensity as an 100W incandescent bulb.
You are right it is confusing.
I had lots of debates with my friends that all light sources should be measured in lumens or candelas but they said it is much easier to understand in watts. ...not my opinion
So being your 23W CFL will be just fine into an 60W rated fixture.