Answer:
Annual wattage cost of 60 watts is $3.729
Annual LED cost of 60 watts is $0.185
total annual cost = $3.914
Annual wattage cost of 15 watts is $0.935
Annual LED cost of 15 watts is $0.125
total annual cost = $1.06
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Explanation:
For the cost of LED and durability
it is require to use a light fixture 500 hours per year
60-watt incandescent light bulb costs $.37 and lasts 1,000 hours. that mean, its last for 2years before buying a new one.
And for a 15-watt LED, costs $3.00 and lasts for 12,000 hours, thats means it will last for 24 years before purchase of another.
assuming, will are using the 60watts for 24years, a cost of $.37*12times = $4.44 will be use for buying.
therefore, a 15 watts LED is more cheaper.
For the current charges of LED
for 60watts
if A kilowatt-hour of electricity costs $.113 =
1000 watts = 1hour = $0.113
60 watts = 1hour = (60*0.133/1000) = $0.0068
it is said that, the consumption is for 500 hour per year.
therefore, 60watts used per year = 500*0.0068 = $3.39
return of 10% =0.339.
total cost of watts for 500hr for a year = 3.39+0.339 = $3.729
Annual wattage cost of 60 watts is $3.729
Annual LED cost of 60 watts ($0.37/2year) is $0.185
total annual cost = $3.914
for 15 watts
if A kilowatt-hour of electricity costs $.113 =
1000 watts = 1hour = $0.113
15 watts = 1hour = (15*0.133/1000) = $0.0017
it is said that, the consumption is for 500 hour per year.
therefore, 15 watts used per year = 500*0.0017 = $0.85
return of 10% =0.085.
total cost of watts for 500hr for a year = 0.85+0.085 = $0.935
Annual wattage cost of 15 watts is $0.935
Annual LED cost of 15 watts ($3/24 years) is $0.125
total annual cost = $1.06
