Homework - Home Light Bulb Use (Page 2 of 4) in pdf

Homework - Home Light Bulb Use Page 2

5. Sum the values in the last column to find the total amount of energy used by light bulbs in

your house each day.

6. To find out how much energy that only the INCANDESCENT bulbs consume in a day,

add values in the last column of Table 1 that correspond to only the COMPACT

FLUORESCENT bulbs and subtract it from the Total found in step 5. Record this value.

7. You can now find out how much energy you can save by switching your incandescent

bulbs to compact fluorescent bulbs.

8. For each type of INCANDESCENT bulb that you found and recorded in Table 1, find its

corresponding row in Table 2. In this row, you can see how much power an equivalent

compact fluorescent bulb consumes.

9. Copy your information about the “number of bulbs” and “# of hours used per day” from

your INCANDESCENT bulbs in Table 1 to their corresponding rows in Table 2.

10. To calulate how much energy that equivalent compact fluorescent bulbs would use in a

day, perform the following multiplication and fill in the last column in Table 2.

Total Daily Energy (kWh per day) = Number of Bulbs x Equivalent Compact Fluorescent

Power (kW) x # of Hours Used per Day (h per day)

Questions

1. How much energy does your home currently use for lighting per day? (kWh/day)

2. How much energy does your home use for INCANDESCENT lights per day? (kWh/day)

3. How much energy would you save by switching to COMPACT FLUORESCENT lights per

day? (kWh/day)

4. If you pay $0.083 per kWh, how much money could you save on your electric bill per year

by switching?

Homework - Home Light Bulb Use Page 2