Homework - Home Light Bulb Use printable pdf download

Homework - Home Light Bulb Use

Homework – Home Light Bulb Use

Name: _______________

Lighting accounts for 20-25% of all the electricity used in the United States. On average a

household sets aside 5-10% of its energy budget to lighting. A commercial industry on the

other hand consumes 20-30% of their energy in lighting only. 50% or more of the energy

used is wasted by obsolete equipment, inadequate maintenance, or inefficient use. Energy

savings for lighting will require either reduction in use or more efficient usage. The

purpose of this homework is to:

• Determine your current electric lighting situation

• Decide if you could benefit from changing from incandescent to compact

fluorescent bulbs

Fill in the attached chart, following these instructions.

Remember to show all work including formulae, answers, and units.

1. Walk around your house and examine any lights that you may have. Fill in the chart below

to charactarize your bulbs. Remember the class activity “Light or Heat Bulbs” when

identifying the type and power rating of the bulbs. Fill in the columns on Table 1.

2. Convert the rated power of your light bulbs from Watts (W) to Kilowatts (kW) on Table 1.

Remember that there are 1000 Watts in 1 Kilowatt.

3. Estimate the number of hours you use each bulb in a day and fill in the appropriate column

in Table 1

4. Calculate the daily energy used each day by each bulb type by multiplying and filling in the

last column of Table 1:

Total Daily Energy (kWh per day)

= Number of Bulbs x Rated Power (kW) x # of Hours Used per Day (h per day)

Homework - Home Light Bulb Use