How much does an LED bulb cost per month in Rhode Island?

About 38.7¢ a month, assuming 9 W, 5 hours a day, 365 days a year at 28.29¢/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?

Rhode Island has the 7th most expensive average residential rate in the country, so this appliance costs more here than the U.S. average of $3.01 a year.

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Cost to run an LED bulb in Rhode Island (July 2026 rates)

At 28.29¢ per kilowatt-hour — Rhode Island's average residential price in July 2026 — running an LED bulb costs $4.65 a year. That is 55% more than the national average of $3.01. Rhode Island's residential rate is up 8.1% from July 2025, which moves this appliance from $4.30 to $4.65 a year.

Per hour: 0.3¢
Per day of use: 1.3¢
Per month: 38.7¢
Per year: $4.65

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 Rhode Island compares

Rhode Island pays 28.29¢/kWh, the 7th most expensive residential electricity of the 51 U.S. jurisdictions EIA reports. For this appliance that works out to $1.64 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 Louisiana and $7.88 in Hawaii, so where you live changes this bill by $5.79 a year.

State	Rate	Per month	Per year
District of Columbia	25.21¢	34.5¢	$4.14
New Hampshire	26.60¢	36.4¢	$4.37
Rhode Island	28.29¢	38.7¢	$4.65
Alaska	28.83¢	39.5¢	$4.74
New York	29.90¢	40.9¢	$4.91

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

What else costs about the same in Rhode Island

Clothes iron$4.67 a year in RI String of christmas lights$1.91 a year in RI Smart speaker$7.43 a year in RI

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 Rhode Island?: About 38.7¢ a month, assuming 9 W, 5 hours a day, 365 days a year at 28.29¢/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?: Rhode Island has the 7th most expensive average residential rate in the country, so this appliance costs more here than the U.S. average of $3.01 a year.