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

watts

Replacement wattage per bulb

watts

Number of bulbs replaced:

bulbs

Energy cost ($ per kWh)

$ /kWh

How many hours per day are the lights on?

/hours

How many days per year are the lights on?

/days
 

What is the initial upgrade cost for the project?

$
 

Result

Simple payback

1.25 years

Rate of return

80.1905 %

Simple annual energy savings

6168.5 kWh

Annual energy cost savings*

$ 801.905