Estimate (compute) the overall energy savings and the overall cost savings, if a

Question

Estimate (compute) the overall energy savings and the overall cost savings, if any, achieved by replacing a 60W incandescent bulb with a compact fluorescent bulb and/or an LED bulb that delivers approximately the same light output. Be sure to include the purchase price and the bulb’s longevity in your analysis Assume that electricity costs $.10 per kilowatt-hour. Show all data, assumptions and calculation.

60W incandescent =$19.98 for 16 = $1.25 per bulb. Each is said to last 1000 hours.

60W CFL=$9.98 for 4=$2.50 per bulb. Each is said to last 10,000 hours

Explanation / Answer

For a

60W incandescent =$19.98 for 16 = $1.25 per bulb. Each is said to last 1000 hours.

Cost for power is $.10 per kilowatt-hour/1000 = $.10*1.25 = $. 12.5

60W CFL=$9.98 for 4=$2.50 per bulb. Each is said to last 10,000 hours

Cost for power is $.10 per kilowatt-hour/10000 = $.0.1*2.5 = $ 0.25

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