## Related questions with answers

The compact fluorescent bulb is another fairly new light source that is likely to have a large impact on home lighting. These bulbs combine the energy effi ciency of traditional fl uorescent lights with the smaller size, “warmer” light, and dimming ability of incandescent lights. Although compact fluorescent bulbs are expensive, manufacturers claim that subsequent savings will more than offset the initial costs. Analyze the relative cost of incandescent versus compact fluorescent lighting, assuming that the information in the table below is accurate. Are industry claims of cost savings justified?

Compact Fluorescent | Incandescent | |
---|---|---|

Initial cost | $15.00 | $2.00 |

Electricity usage | 18 watts | 75 watts |

Electricity cost | 0.04//kwh | 0.04//kwh |

Lifetime | 10,000 hours | 2,500 hours |

Solution

VerifiedThe costs for two kinds of light bulbs are given and to compare the two, at first, calculate the total cost of buying a bulb

$\textbf{Total cost} = \text{Initial cost} + [\text{Electricity usage} \cdot \text{Electricity cost} \cdot \text{Lifetime}]$

Then, compare the savings by calculating the costs for using the two bulbs for the same time period in order to agree or disagree with the statement that 'fluorescent bulbs' are better subsequent savings-wise.

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