In addition to saving energy, you can save $ too! CFLs are great. I have switched my incandescent bulbs to the spirals, and I am also using CFL floodlights. Here is a link to an online savings calculator; you can see the energy and money savings of switching to CFLs - http://www.nvisioncfl.com/savings-calcul... It also shows you the formula it uses to calculate the savings.
