Question

Suppose your electric lights use 500 watts per hour and average four hours per day, every day for one year. How many kWh per year does this represent?

Answer 1

First, convert watts to kilowatts.

500w/1000= .5 kW per hour

.5*4 hours= 2kwh*365 days= 730 kWh

The answer is 730 kwh per year