Use our Energy Savings Calculator to find out how much you can save by switching to the more enregy efficient Compact Fluorescent Light Bulbs (CFLs). To use the calculator, enter the number of lights you will be replacing, your electricity rate from your most recent electric bill (the default is based on the average cost of $0.101 kilowatt/hr), the number of hours per day the lights will be turned on, and some basic information about the CFL bulbs you will be purchasing, as well as the Incandescent Bulbs you will be replacing. The calculator will automatically update itself based on the values entered.