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ambergoat258Lv1
28 Sep 2019
Compact fluorescent lamps (CFLs) have become required in recent years, but do they make financial sense? Suppose a typical 60-watt incandescent light bulb costs $.55 and lasts 1,000 hours. A 15-watt CFL, which provides the same light, costs $3.90 and lasts for 12,000 hours. A kilowatt-hour of electricity costs $.131, which is about the national average. A kilowatt-hour is 1,000 watts for 1 hour. If you require a return of 11 percent and use a light fixture 500 hours per year, what is the equivalent annual cost of the compact fluorescent lamps (CFLs)?
Compact fluorescent lamps (CFLs) have become required in recent years, but do they make financial sense? Suppose a typical 60-watt incandescent light bulb costs $.55 and lasts 1,000 hours. A 15-watt CFL, which provides the same light, costs $3.90 and lasts for 12,000 hours. A kilowatt-hour of electricity costs $.131, which is about the national average. A kilowatt-hour is 1,000 watts for 1 hour. If you require a return of 11 percent and use a light fixture 500 hours per year, what is the equivalent annual cost of the compact fluorescent lamps (CFLs)? |
Elin HesselLv2
28 Sep 2019