How much does an LED bulb cost per month in Massachusetts?

About 41.7¢ a month, assuming 9 W, 5 hours a day, 365 days a year at 30.48¢/kWh.

How many kilowatt-hours does an LED bulb use?

Roughly 16 kWh a year under these assumptions, or 0.01 kWh for every hour it runs.

Is that expensive compared with other states?

Massachusetts has the 3rd most expensive average residential rate in the country, so this appliance costs more here than the U.S. average of $2.98 a year.

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Cost to run an LED bulb in Massachusetts (August 2026 rates)

At 30.48¢ per kilowatt-hour — Massachusetts's average residential price in August 2026 — running an LED bulb costs $5.01 a year. That is 68% more than the national average of $2.98.

Per hour: 0.3¢
Per day of use: 1.4¢
Per month: 41.7¢
Per year: $5.01

Assumption: 9 W, 5 hours a day, 365 days a year — 16 kWh a year. A 9 W LED producing about 800 lumens, the equivalent of an old 60 W incandescent. Use the calculator to swap in the numbers from your own model.

How Massachusetts compares

Massachusetts pays 30.48¢/kWh, the 3rd most expensive residential electricity of the 51 U.S. jurisdictions EIA reports. For this appliance that works out to $2.02 more a year than the typical U.S. household pays for the same use. Running the same LED bulb costs $2.09 a year in Nevada and $7.75 in Hawaii, so where you live changes this bill by $5.66 a year.

State	Rate	Per month	Per year
Alaska	29.41¢	40.3¢	$4.83
California	29.75¢	40.7¢	$4.89
Massachusetts	30.48¢	41.7¢	$5.01
Maine	32.11¢	44.0¢	$5.27
Hawaii	47.18¢	64.6¢	$7.75

States ranked by average residential price, cheapest first. See all 51 states for an LED bulb.

What else costs about the same in Massachusetts

Clothes iron$5.03 a year in MA String of christmas lights$2.06 a year in MA Smart speaker$8.01 a year in MA

Cutting the number down

Per bulb the cost is trivial; a house has 40 of them, and that is the number that matters.
Dimming an LED does cut power draw, though not perfectly in proportion to the light output.

Questions

How much does an LED bulb cost per month in Massachusetts?: About 41.7¢ a month, assuming 9 W, 5 hours a day, 365 days a year at 30.48¢/kWh.
How many kilowatt-hours does an LED bulb use?: Roughly 16 kWh a year under these assumptions, or 0.01 kWh for every hour it runs.
Is that expensive compared with other states?: Massachusetts has the 3rd most expensive average residential rate in the country, so this appliance costs more here than the U.S. average of $2.98 a year.