Energy Savings Calculator for Lighting

Fill out the boxes below to determine your rate of return on a new lighting upgrade.

Enter your project information

Original wattage per bulb


Replacement wattage per bulb


Number of bulbs replaced:


Energy cost ($ per kWh)

$ /kWh

How many hours per day are the lights on?


How many days per year are the lights on?


What is the initial upgrade cost for the project?



Simple payback

1.25 years

Rate of return

80.1905 %

Simple annual energy savings

6168.5 kWh

Annual energy cost savings*

$ 801.905