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Compact fluorescent lamps (CFLs) have become required in recent years, but do they make financial sense?...

Compact fluorescent lamps (CFLs) have become required in recent years, but do they make financial sense? Suppose a typical 60-watt incandescent lightbulb costs $.38 and lasts for 1,000 hours. A 15-watt CFL, which provides the same light, costs $3.05 and lasts for 12,000 hours. A kilowatt-hour of electricity costs $0.114 which is about the national average. A kilowatt-hour is 1,000 watts for 1 hour. If you require a return of 9 percent and use a light fixture 500 hours per year, what is the equivalent annual cost of each light bulb?

equivalent annual cost

60-watt incandescent light

$

Compact fluorescence lamps

$
0 0
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Answer #1

PageNo Answer: Given that, Light bulbo A Cost = $0:38 Light bulb A life = 1000 hours Light bulb B Cost - $ 3.05 Light bulb BPageno light bulb 13 = Compact fluroscence lamp Watts per hour = walts of the bulbo 1000 35 1000 20.015. Killowatt how per yePage no The Eletricity cost pea year for each light bulb for light bulb Az Yanlig electricity Co$t = kilowatt how per year xРадемо 0 DO SOO For Light Bulb B: 000CT = 500 =au The annuity factor for each light bulb for light bulb A: Annuity factors !-Pageno The Net persent value (npu) of each light bulb NPV = Price of the bulb + (Yecorly Euctricity cost for light bulba: x APage No@ For light Bulb As = $6.31541 1.4355 = $ 3.63 For light Bulb Bir = $ 11.0019595 8.9897 = $ 1.22 Equivalend annual ca

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