The link below will bring you to a pdf prepared by the California Lighting Technology Center, U.C., Davis. It is a postion paper, a guide for contractors, easy to understand as well as graphically helpful.  Title 24 actual regulations are available online just Google it or go to Mike on Title 24 where there is a link.

This is a 28 page document so be patient it takes acrobat a minute to load.

One of the things you can do to save electricity is install dimmers.  Lutron has a savings calculator