Compare the amount of energy used and money spent if this library used only incandescent light bulbs, only CFLs, or only LEDs by completing the calculations in the following table. Note that a 60-watt incandescent light bulb is equivalent to the brightness of one 15-watt CFL or one 7-watt LED.Additionally, the city charges this library $0.08 per kilowatt-hour used.

Total watts used by all desk lamps in library
Total kilowatts used (divide total number of watts by 1,000)
Total kilowatt-hours used in one day (multiply kilowatts by the number of hours used per day)
Total kilowatt-hours used in one year (assume library is open every day)
Total money spent on light bulb energy consumption per year