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Compact fluorescent light bulbs provide similar lighting characteristics as incandescent bulbs but use only \(\frac{1}{4}\) of the energy of incandescent bulbs. Estimate the energy savings potential on a national scale by replacing all incandescent bulbs in residential lighting applications with compact fluorescent bulbs.

In 2008, total U.S. energy consumption was 99.3 quadrillion (\(10^{15}\)) BTUs (quads), and electricity in all applications consumed 40.1 quads of primary energy. Assume that residential lighting accounts for 3% of all electricity consumption in the U.S. and that all energy consumption for residential lighting is due to incandescent bulb use.

1. How large (in percentage) is the energy savings compared to the annual U.S. energy consumption (using 2008 as the reference year)?

2. Is this savings significant?

Answer :

Final answer:

Replacing all incandescent bulbs in home lighting applications with compact fluorescent light bulbs could result in energy savings of about 0.909% of the total U.S. energy consumption. Although this percentage may seem small, it's significant in the context of reducing overall energy use and greenhouse gas emissions.

Explanation:

First, let's outline the current energy use: The total U.S. energy consumption in 2008 was 99.3 quads and residential lighting, which we're assuming is all incandescent bulb use, consumes 3% of all electricity consumption in the U.S., which is 40.1 quads. Therefore, the energy consumption due to residential lighting is 1.203 quads (3% of 40.1 quads).

Now, if compact fluorescent light bulbs use only 1/4 of the energy of incandescent bulbs, the energy consumption of residential lighting would reduce to 0.30075 quads (1/4 of 1.203 quads).

The energy savings would therefore be the difference between the two, which is 0.90225 quads. To find out how large this is as a percentage of annual U.S. energy consumption, divide the energy savings by the total energy consumption, which gives us 0.00909, or about 0.909%. So the energy savings potential of replacing all incandescent bulbs with compact fluorescent light bulbs in home lighting applications is about 0.909% of the total U.S. energy consumption.

Is this savings significant? While 0.909% might seem small, it's important to put it into context. In terms of curbing energy use and reducing greenhouse gas emissions, every bit counts. So yes, this saving is significant.

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