Light Bulb Energy Saving Calculator

Use this calculator to estimate your savings, pay-off and lifespan for ENERGY STAR-qualified compact fluorescent lamps.

Your approximate savings, pay-off, and lifespan are:

Estimated energy savings per year:

kilowatt hours

Estimated savings per year:

Estimated ENERGY STAR^® pay-off:

months

Estimated ENERGY STAR^® lifespan:

years

Update any fields to evaluate another scenario:

Existing incandescent light bulb size

watts

Replacement ENERGY STAR^® compact fluorescent bulb size:

watts

Number of light bulbs:

bulbs

Hours of use per day:

hours

Cost per incandescent light bulb:

. dollars

Cost per ENERGY STAR^® compact fluorescent bulb:ElectricityCostCents

. dollars

Electricity cost:

. cents per KWH

Calculator provided courtesy of the sponsoring organizations of Northeast Energy Efficiency Partnerships, Inc. (NEEP).

Savings are for wattages shown. Your actual savings will vary based on the wattages you purchase. When comparing incandescent or halogen bulbs to ENERGY STAR qualified bulbs or fixtures, compare the light output, or lumens, and not Watts. Watts equal the energy used, not the amount of light.

Click here to view some of our ENERGY STAR-qualified compact fluorescent light bulbs

Other calculators are available here:
» Residential ENERGY STAR lighting fixture energy and cost savings calculator