Modern LED Christmas lights cost $2–$10 per month to run for a typical residential display (6 hours per night). That's $4–$20 for the entire 2-month Christmas season. Permanent smart LED systems cost about the same. Old-school incandescent lights cost 5-10x more to run.
LED vs incandescent: the energy comparison
For a typical residential display (150 ft roofline + basic landscaping) at $0.13/kWh Iowa residential rate:
| LED | Incandescent | |
|---|---|---|
| Total wattage | 50–150 watts | 500–1,500 watts |
| Daily cost (6 hrs) | $0.04–$0.12 | $0.40–$1.20 |
| Monthly cost | $1.20–$3.60 | $12–$36 |
| Season cost (8 weeks) | $2.40–$7.20 | $24–$72 |
| Annual (permanent, 365 nights) | $15–$44 | N/A (would melt) |
Why LEDs use so much less
LEDs produce light through electroluminescence — almost all energy goes to light, with very little wasted as heat. Incandescent bulbs heat a filament until it glows — about 90% of energy is wasted as heat. That's why incandescent strands feel hot to the touch and why they're a fire risk on dry trees.
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Real-world costs and permanent lighting
Seasonal C9 LEDs: Small display (80 ft): ~$2/month. Standard display (150 ft + landscaping): ~$4/month. Large display (250 ft + trees + pathways): ~$8/month.
Permanent smart lighting (Haven): Standard home (150 ft): ~$3/month at 6 hrs/night. Year-round (365 days): ~$30–$40/year total. Comparable to leaving a 60-watt lamp on.
The 'leave them on all night' question: Running LEDs 14 hours instead of 6 roughly doubles the electricity cost — still $4–$8/month. Use a timer anyway; lights at 3 AM don't add to your enjoyment.
See the permanent lighting cost guide for the full financial picture.
Frequently Asked Questions
With LED displays, no. Most homeowners don't notice any change. Incandescent displays can add $30–$70 to a monthly bill.
Per month, about the same. But permanent lighting runs 12 months vs. 2, so annual electricity is higher. At $25–$40/year, it's comparable to a single porch light.
Solar pathway stakes and small accent lights exist but don't produce enough light for a roofline display.
Written by Trey, Owner — Heartland Holiday Lights
Trey is a Council Bluffs local and hands-on installer who designs and installs every permanent smart-lighting system Heartland Holiday Lights puts on homes across Western Iowa and the Omaha metro. When he writes about rooflines, channel, and controllers, it's because he's on the roof doing the work.
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