For example, a 100 W incandescent lamp costs $1.20 to purchase and has an average lamp life of 1000 hours, while a 25 W LED lamp costs $30.00 and lasts 25,000 hours. If the cost of energy is $0.09 per kilowatt-hour, determine the electrical cost of running each load for 1000 hours.
Incandescent electrical cost:
LED electrical cost:
While the LED clearly costs less to run for 1000 hours, its high initial cost of $30.00 makes it the more expensive choice compared to the $1.20 initial cost for the incandescent lamp.
Incandescent total cost:
LED total cost: