Extended Efficiency Calculator
Calculate the total kilowatts saved by replacing the inefficient lamps with more efficient lamps
Original Lamp Wattage
Replacement Lamp Wattage X
Watts Saved Per Lamp =
Number of Lamps to Replace X
Total Watts Saved =
  Total Kilowatts Saved =
Calculate the total kWh per year saved
Total Kilowatts Saved
Enter Hours Used Per Day X
Enter Days Used Per Week X
Enter Weeks Used Per Year X
  Total kWh Saved Per Year =
Calculate the total energy cost saved per year
Total Kilowatts Saved Per Year
Energy Cost Per kWh X
  Total Energy Cost Savings per Year =
Payback on Investment
Lamp Cost $
Lamp Life Hours
Initial Cost of Lighting Upgrade $
Total Energy Cost Savings Per Year /
  # of Payback Investment Months =
  Savings over Life of Upgrade =