NAME: _______________________________________________ DATE: _____________ CLASS: ______________
HOME ENERGY AUDIT: LIGHTING WORKSHEET
Created for the NTEP II program on behalf of the National Renewable Energy Laboratory in Golden, Colorado.
How much energy/money can be saved by replacing our light bulbs with Compact Fluorescent Lights?
Each energy efficient CFL bulb saves 50 watts, how many watt-hours could you save if you replaced all bulbs with CFLs?
Divide your answer by 1,000 since there are 1,000 watt-hours in a kilowatt-hour (which is how your utility bills you)
Take this answer and multiply it by 365 (the days in a year) to calculate the Kilowatt-hours saved in a year.
To calculate the amount of money your family could save in a year, take the Kilowatt-hours saved in a year times the cost per Kilowatt-hour ( in Denver it is $.089).
In addition to saving money, we use less electricity! Using less electricity means producing less greenhouse gases. If we assume that every kilowatt-hour saved removes 2 pounds of carbon dioxide from the air, how much greenhouse gases could be prevented?
Kilowatt-hours saved in a year X 2 pounds = _______________pounds of greenhouse gas