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

About 17.6¢ a month, assuming 9 W, 5 hours a day, 365 days a year at 12.87¢/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?

Louisiana has the 2nd cheapest average residential rate in the country, so this appliance costs less here than the U.S. average of $2.98 a year.

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

At 12.87¢ per kilowatt-hour — Louisiana's average residential price in August 2026 — running an LED bulb costs $2.11 a year. That is 29% less than the national average of $2.98. Louisiana's residential rate is up 2.5% from August 2025, which moves this appliance from $2.06 to $2.11 a year.

Per hour: 0.1¢
Per day of use: 0.6¢
Per month: 17.6¢
Per year: $2.11

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 Louisiana compares

Louisiana pays 12.87¢/kWh, the 2nd cheapest residential electricity of the 51 U.S. jurisdictions EIA reports. For this appliance that works out to 86.9¢ less 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
Nevada	12.72¢	17.4¢	$2.09
Louisiana	12.87¢	17.6¢	$2.11
North Dakota	13.31¢	18.2¢	$2.19
Utah	13.31¢	18.2¢	$2.19
Idaho	13.37¢	18.3¢	$2.20

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

What else costs about the same in Louisiana

Clothes iron$2.12 a year in LA String of christmas lights86.9¢ a year in LA Smart speaker$3.38 a year in LA

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 Louisiana?: About 17.6¢ a month, assuming 9 W, 5 hours a day, 365 days a year at 12.87¢/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?: Louisiana has the 2nd cheapest average residential rate in the country, so this appliance costs less here than the U.S. average of $2.98 a year.