Christmas Lights Running Cost Calculator

Enter how many light strings, their type, and hours run per night to see the cost for the whole holiday season.

⏱ ~10 sec🎄 Seasonal🔒 No signup

Result

$4.08 total
Cost for the whole season
Per night$0.10
Same setup in incandescent$40.80

A typical 100-count incandescent mini-light string uses about 40-50W, while the same length in LED uses roughly 5W — around an 85-90% reduction.

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Why LED holiday lights barely register on a bill

Season cost = (Watts per string × strings ÷ 1000) × Hours/night × Season days × Rate

Swapping incandescent mini-lights for LED versions typically cuts holiday lighting cost by roughly 90%, similar to the savings from the general LED vs incandescent comparison — but with the added benefit that LED strings run much cooler, reducing fire risk on dry trees and greenery.

Frequently asked questions

How much do incandescent Christmas lights really cost for a season?

For a typical 10-string display run 6 hours a night for 40 nights, incandescent mini-lights often run $30-50 for the season, versus just a few dollars for the LED equivalent.

Do LED lights cost more upfront?

Usually somewhat more per string, but the energy savings across even a single season often make up the difference, and LED strings also tend to last many more seasons before needing replacement.

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