Washington Post: Most of us think of home energy savings in terms of products, prices and percentages. For instance: A compact fluorescent light bulb costs about five to 10 times as much as a standard incandescent bulb, it uses about 75 percent less energy, and it lasts eight to 10 times longer. But you can also save energy and money simply by getting more information. That means determining the amount of electricity used by all the equipment in your house. This can frequently be significantly …