Energy Savings Calculator Lighting makes the difference in business we make the difference in light Annual Energy Savings / ROI Calculator Enter Step 1. Calculate the total kilowatts saved by replacing the inefficient lamps with more efficient lamps Enter Original Lamp Wattage Enter Replacement Lamp Wattage - Watts Saved per Lamp = Enter Numbers of Lamps to replace x Total Watts Saved = Total Kilowatts Saved = Step 2. Calculate the total kWh per year saved by this upgrade 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 = Step 3. Calculate the total energy costs saved per year by this upgrade Total kWh Saved per Year Enter Your Energy Cost per kWh (typically $.10) x Total Energy Cost Savings per Year = Step 4. Compute the payback of the upgrade Enter Initial Cost of Lighting Upgrade $ Total Energy Cost Savings per Year / # of Years for Payback on Investment = Email: