Christmas Lights Cost Calculator
Count your strings, pick the bulb type - mini incandescent pulls 40 watts a string, mini LED about 5, and the big C9s run 175 versus 25 - then set hours per night and your electric rate. The season bill lands in dollars, with the LED-swap saving right next to it.
Retailer pages sell strings and skip the meter. This one prices the display honestly: LED pays for itself in one to two seasons at six hours a night, three-strings-per-plug is a hard rule for old C9s, and a ten-dollar timer answers the question nobody wants to climb the ladder to ask.
How to use
- Count every string going up, including the ones in the attic you forgot.
- Match the type - the wattage per string is printed near the plug.
- Set the timer hours honestly; six is the national habit.
Frequently asked questions
How much does it cost to run Christmas lights?
Six mini LED strings at 6 hours a night for 45 days cost well under 2 dollars at typical rates. The same count in old mini incandescents runs about 8 times that, and C9 incandescents make the meter spin like a small space heater.
Do LED Christmas lights really save money?
Yes - roughly 85-90% less electricity per string, plus they run cool so they last many seasons. The payback on the price difference is typically one to two seasons of evening display use.
How many Christmas light strings can I connect?
Incandescent: three strings maximum end-to-end on one circuit run - that is the printed safety limit, not a suggestion. LED: read the box, most allow more because the current is tiny and the strings stay cool.
Why did half my light string go dark?
On incandescent sets, a single dead bulb or the little plug fuse breaks the circuit for everything downstream - check the fuse door in the plug first, then the bulbs nearest the dark section. LEDs fail per-bulb; the rest stay lit.