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Light - emitting diode ( LED ) light bulbs have become required in recent years, but do they make financial sense? Suppose a typical 6
Lightemitting diode LED light bulbs have become required in recent years, but do they make financial sense? Suppose a typical watt incandescent light bulb costs $ and lasts for hours. A watt LED, which provides the same light, costs $ and lasts for hours. A kilowatthour of electricity costs $ which is about the national average. A kilowatthour is watts for hour. However, electricity costs actually vary quite a bit depending on location and user type you can get information on your rates from your local power company An industrial user in West Virginia might pay $ per kilowatthour whereas a residential user in Hawaii might pay $
You require a percent return and use a light fixture hours per year. What is the breakeven cost per kilowatthour? A negative answer should be indicated by a minus sign. Do not round intermediate calculations and round your answer to decimal places, eg
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