Estimate your LED savings
Common replacement pair
| Annual energy with old bulbs | 525.6 kWh |
| Annual energy with LEDs | 78.8 kWh |
| Annual saving | 446.8 kWh · $80.42 |
| Simple payback | 0.4 years |
Note: wattage is only part of the decision. Choose bulbs with the brightness, color temperature and fitting you need; enter the electricity price from your own bill for a local estimate.
How the estimate works
The calculator multiplies each bulb's wattage by the hours it is used over a year, converts watt-hours to kWh and applies the electricity price you enter. Payback is the LED purchase cost divided by the annual cost saving.
Use your own figures
LED wattage and brightness vary between products, and tariffs vary between homes. Replace the example values with the bulb packaging and a current bill price for a more useful result.