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?

1. Search your home and count the number of lights in each room. Each halogen light uses three times the energy and must be counted three times.
2. Calculate the number of hours the lights are used in each room each day.
3. Enter the data below.

 Number of lights Number of hours Lights X hours = TOTAL Living Room ______________ ______________ ______________ Dining Room ______________ ______________ ______________ Kitchen ______________ ______________ ______________ Bedrooms ______________ ______________ ______________ Bathrooms ______________ ______________ ______________ Hallways ______________ ______________ ______________ Family Room ______________ ______________ ______________ Outside Lights ______________ ______________ ______________ TOTAL ______________

Each energy efficient CFL bulb saves 50 watts, how many watt-hours could you save if you replaced all bulbs with CFLs?

total hours of operation X 50 watts = _________Watt hours you would save each day

Divide your answer by 1,000 since there are 1,000 watt-hours in a kilowatt-hour (which is how your utility bills you)

Watt hours / 1,000 = _______________ kilowatt-hours you would save

Take this answer and multiply it by 365 (the days in a year) to calculate the Kilowatt-hours saved in a year.

kilowatt hours X 365 = __________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).

Kilowatt-hours saved X \$.089 = ______________Amount saved per year!

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