The short answer
LED holiday lights use about 70% less energy than incandescent strands, per the U.S. Department of Energy, and the gap is wider for large C9 bulbs. Far more LED sets can be connected end to end, they are sturdier, and they run well in cold. Incandescents give a traditional warm glow and cost less upfront. Macomb Power Washing Solutions installs commercial-grade LEDs.
What Are People Really Asking?
Most homeowners asking about LED versus incandescent are really asking two other things: why professional lighting costs more than a store-bought strand, and why the lights they bought last year already have dark sections.
Both answers come down to the same distinction, and it is not primarily LED versus incandescent. It is consumer grade versus commercial grade, which is a bigger gap than the bulb technology itself.
The Comparison
| Commercial LED | Incandescent | |
|---|---|---|
| Energy use | About 70% less per DOE; more for C9s | Baseline |
| Sets connected end to end | Many more; check the label | CPSC advises no more than three |
| Durability | Sturdier, less likely to burn out or break (DOE) | Shorter-lived |
| Cold weather behavior | Runs efficiently in cold | Works, but open sockets admit water that freezes |
| Heat output | Negligible | Warm to the touch |
| Failure mode | A failed LED usually shorts and the rest stay lit; a loose bulb can still darken a section of a mini set | A burned-out filament opens the circuit; if the shunt fails, a section goes dark |
| Color quality | Warm whites now close to incandescent | Traditional warm glow, its main draw |
| Color changing | Available with RGB systems | Not possible |
| Upfront cost | Higher | Lower |
Connection Limits and Circuit Load
Two different limits get mixed together here, and they decide how big a display one outlet can carry.
The first is the end-to-end limit printed on each set: how many sets can plug into one another before the first set's wire and fuse are overloaded. Incandescent sets reach that limit fast, and the CPSC advises never stringing together more than three sets of incandescent lights. LED sets draw so little that their labels typically allow many more sets connected end to end; the limit is printed on the tag near the plug. That is the difference between outlining one gable and outlining a roofline, the garage and the pathway from one starting point.
The second is the circuit itself, which trips on total amps from everything plugged into it. A large incandescent C9 roofline can take up a big share of a household circuit on its own, while the same roofline in LED C9s draws a fraction of an amp. Our cost to run Christmas lights in Michigan post works through the watts, amps and season cost for both.
It is also a safety matter. Overloading outlets with incandescent runs, or daisy-chaining extension cords to get around it, is a hazard the CPSC warns against.
What Michigan Winters Do to Each
Our climate is hard on holiday lighting: temperature swings from mild to well below freezing, dozens of freeze-thaw cycles, ice loading, wind, and road salt in the air near main roads.
Incandescent sets fail in a Michigan winter mostly at the sockets and wire: water gets into open sockets and freezes, ice load and wind work on light-gauge wire, and salt spray near main roads corrodes contacts. When a filament burns out it opens the circuit, and if the bulb's shunt does not carry the current, a section goes dark.
LEDs have no filament. They are solid-state, generate almost no heat, and a Department of Energy report notes that LEDs perform better in cold than at room temperature. The failure points on a quality LED display are the connections and the wire jacket, not the diodes, which is why commercial-grade construction matters.
The distinction that matters: commercial-grade LED lighting uses heavier gauge wire, sealed weather-resistant connectors and coaxial bases that resist water ingress. A cheap LED strand with unsealed sockets fails in a Michigan winter for the same reason a cheap incandescent does — water gets in, freezes, expands.
Where Incandescents Still Win
Incandescents do keep one edge: their light has a warmth and a specific spectral quality that early LEDs could not match. Some people strongly prefer that traditional glow, particularly on historic homes where a cooler white looks wrong.
Modern warm-white LEDs have closed most of the gap, and a good installer can show you samples lit side by side. But if you have a specific attachment to the incandescent look, that is a legitimate preference rather than a mistake. It simply comes with shorter life, fewer sets per run, and more mid-season failures.
Consumer Strands vs. What Professionals Install
Even setting the bulb technology aside, professional-grade product differs in ways that decide whether a display survives a Michigan winter:
- Heavier gauge wire that tolerates ice loading and wind without stressing the connections
- Sealed, weather-resistant connectors rather than open sockets that admit water
- Custom-cut runs made to your roofline's actual length, instead of chaining fixed-length strands with loops of slack at every corner
- Proper clips for each substrate: shingle, gutter, fascia and brick each need a different attachment, and none of them should involve staples or nails
- Serviceability: a professional system can be repaired mid-season rather than replaced
That last point is worth dwelling on. Most fixed-length store strands are not built to be repaired, so a section that fails in mid-December usually means a replacement strand. Part of what a professional holiday lighting service provides is that if something fails, someone comes out and fixes it while the display is still up. Our seasonal installation runs $18 to $32 per linear foot with a $595 minimum, with repairs through the season and January takedown included.
RGB and Color-Changing Systems
Worth knowing this exists, because it is only possible with LED. RGB systems let a single installed run produce different colors on demand: red and green in December, orange for Halloween, red, white, and blue in July, team colors during a playoff run. One installation, many looks, controlled from a phone.
You can preview this on your own house before committing. Our LightCast™ visualizer lets you upload a photo, detects your roofline, and shows color changes in real time on your own home.
The Bottom Line
For a Michigan winter, commercial-grade LED is the stronger choice on energy, durability, safety and display scale. The upfront cost is higher and the running cost is far lower. The main reason to choose incandescent is a preference for that traditional warm glow, which is a legitimate choice that costs more to run.
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