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CFL Savings Estimator

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Assuming you replaced all your incandescent bulbs with compact

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fluorescent bulbs, how long would it take to recoup the costs?

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$0.0698$ / kWh

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5Average hours per day of 60 Watt bulb use

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5Average hours per day of 100 Watt bulb use

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Bulbs60/14 Watt100/23 WattTotal

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Number of bulbs12618

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Incandescent

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Cost per day per bulb$0.02$0.03--

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Cost per day bulb$0.25$0.21$0.46

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CFL

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Price per bulb$1.72$3.44--

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Total rollout cost$20.64$20.64$41.28

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Cost per day per bulb$0.00$0.01--

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Total Cost per day$0.06$0.05$0.11

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Savings Per Day$0.19$0.16$0.35

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Savings Per Month$5.78$4.84$10.62

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Days to recoup costs107.14128.01116.65

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Months to recoup costs3.89