Cost to run a led light bulb
Short answer
Running a led light bulb (~10W, ~5 hrs/day) costs about $0.01/day, $0/month, or $3/year at the U.S. average of 16.8¢/kWh.
Wattage
10 W
Per day
$0.01
Per month
$0
Per year
$3
Figures assume ~10W for ~5 hours a day at the U.S. average 16.8¢/kWh. Your state's rate and your real usage change the total — enter both in the calculator.
Your rate & usage
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Frequently asked questions
How much does it cost to run a led light bulb?
About $0.01 per day, $0 per month, or $3 per year at the U.S. average of 16.8¢/kWh, assuming ~10W for ~5 hours a day.
How many watts does a led light bulb use?
A typical led light bulb draws about 10 watts when running. Your model may differ — check its label or a plug-in power meter and enter the real number in the calculator.
How can I cut the cost of running a led light bulb?
Run it less, use a more efficient model, and check whether your utility offers cheaper off-peak (time-of-use) rates. Costs also vary 4× by state, so your local rate matters a lot.