Learning Center Energy Efficient Bulbs Energy Savings Calculator The calculator will work with any type of existing or replacement bulb. Simply enter the requested information and watch the values change (remember to hit 'return' or 'enter' on your keyboard after entering or changing a value). If you are changing the bulbs yourself, leave the "Re-lamp labor cost" field at zero. Existing Bulb Typical A-19 Incandescent Wattage watts Price dollars Life hours Replacement Bulb Typical LED Wattage watts Cost dollars Life hours Cost of Electricity Find your average rate: Commercial Residential Select a State Alaska Alabama Arkansas Arizona California Colorado Connecticut District of Columbia Delaware Florida Georgia Hawaii Iowa Idaho Illinois Indiana Kansas Kentucky Louisiana Massachusetts Maryland Maine Michigan Minnesota Missouri Mississippi Montana North Carolina North Dakota Nebraska New Hampshire New Jersey New Mexico Nevada New York Ohio Oklahoma Oregon Pennsylvania Rhode Island South Carolina South Dakota Tennessee Texas Utah Virginia Vermont Washington Wisconsin West Virginia Wyoming Select a State Alaska Alabama Arkansas Arizona California Colorado Connecticut District of Columbia Delaware Florida Georgia Hawaii Iowa Idaho Illinois Indiana Kansas Kentucky Louisiana Massachusetts Maryland Maine Michigan Minnesota Missouri Mississippi Montana North Carolina North Dakota Nebraska New Hampshire New Jersey New Mexico Nevada New York Ohio Oklahoma Oregon Pennsylvania Rhode Island South Carolina South Dakota Tennessee Texas Utah Virginia Vermont Washington Wisconsin West Virginia Wyoming or enter from your bill $/kWh Other Factors Number of bulbs being replaced bulbs Hours of operation p/wk hours Re-lamp labor cost $/hour Time to replace one bulb minutes The Bottom Line Total Savings Return on Investment ROI = Total Savings - Total Investment Total Investment A ratio of money gained or lost relative to the amount of money invested, expressed as a percentage. For example, if you invest $1 and receive $2 from your investment, your return on investment is 100%. Simple Payback The amount of time necessary to save as much money as you invested initially, expressed in months. In other words, your “break-even point”. For the purposes of this calculator, the “investment” is the difference in cost between your existing bulbs and the replacement bulbs plus the cost of installation. The Details Energy saved per bulb Money saved over life of bulb Number of existing bulbs used for each replacement bulb Difference in cost between one replacement bulb and existing bulbs replaced Total savings from one replacement Gross savings from all replacements Investment The difference in cost between your existing bulbs and the replacement bulbs. Investment in installation Total investment Net savings Net savings per hour Net savings per week Net savings per month Net savings per year