How to Hang Holiday Lights Safely

Use lights carrying a mark from a recognized testing lab, such as UL or ETL, and check every set and cord for damage before you hang it. Outdoors, use only lights and cords rated for outdoor use, plugged into a GFCI-protected outlet or a portable GFCI. Don't overload outlets or extension cords beyond what the package allows, and turn everything off at bedtime or when you leave the house. Save any ladder work for solid footing and stay well clear of power lines.

What kind of lights should you buy or reuse?

Before anything goes up, look for a mark from a recognized testing laboratory, such as UL or ETL, on the box or the light set itself. That mark means the lights met a safety standard for electrical products; it isn't a brand endorsement, just a label to look for.

If you're reusing lights from last year, check them again even if they worked fine before. Look at every set and every cord for:

• broken or cracked sockets;
• frayed or bare wires;
• loose connections where bulbs or cords plug together.

Throw out anything damaged. A set with a cracked socket or a bare wire isn't worth the risk of a bulb replacement or a patch job.

Source: CPSC news release, "Put Safety at the Top of Your List When Decorating this Holiday Season", as of September 2026.

Are your outdoor lights actually rated for outdoors?

Indoor and outdoor light sets are built and tested differently, and the label on the box or the cord tells you which you have. Outdoors, use only lights and extension cords marked for outdoor use — even under an eave or a porch roof.

Outdoor outlets need GFCI protection. A ground-fault circuit interrupter (GFCI) cuts power fast if it senses current leaking somewhere it shouldn't, which is exactly the risk with lights and cords sitting outside in the weather. Plug outdoor lights into a GFCI-protected outlet, or use a portable GFCI adapter if the outlet itself isn't protected.

If your outdoor outlets have no GFCI protection at all, that's an electrical fix, not a lights fix. Adding GFCI protection to a circuit is work for a licensed electrician — don't wire it in yourself. Book outlet and switch installation to have GFCI protection added before you rely on it for outdoor lights.

Sources: CPSC, above, and NFPA, "Holiday lighting: to inspect or not to inspect", as of September 2026.

How many light sets can you string together?

Every light set's packaging lists the maximum number of sets that can be safely connected end to end — follow that number rather than guessing. The same goes for how much you plug into a single outlet or extension cord: an overloaded outlet or cord is a common cause of holiday electrical fires, so spread lights across more than one circuit if you're covering a big area.

Also worth checking:

• The extension cord's rating. It should be rated for the load you're putting on it, and marked for outdoor use if it's running outside.
• Where cords run. Keep them out of paths where people walk, out from under rugs indoors, and clear of snow and standing water outside.
• What's plugged in nearby. Don't add holiday lights to a circuit that's already carrying other high-draw items.

Should lights be on overnight or while you're out?

No. Turn holiday lights off when you go to bed and when you leave the house, rather than leaving them plugged in unattended. This is standard fire-safety advice from the U.S. Fire Administration and local fire departments, including in Northern Virginia.

Source: USFA, "Prevent fires: holiday", as of September 2026.

What should you do before you start hanging lights?

A few minutes of prep saves a trip back up the ladder later:

• Plug in and test every set on the ground first, before it goes up anywhere. It's much easier to swap a bad set or bulb at eye level than after it's clipped along a roofline.
• Plan the route you want the lights to follow, and roughly how many sets that will take, so you're not stopping partway to fetch more.
• Sort sets by what they're rated for — indoor-only sets stay inside, outdoor-rated sets go outside — before you start climbing.
• Have your fasteners ready. Clips designed for gutters, shingles or siding hold lights without puncturing anything, which is worth using instead of nails, staples or tape that can damage the roof, siding or gutters, or fray a cord's insulation.

How do you hang lights without damaging the roof or gutters?

• Use clips made for the surface — gutter clips, shingle tabs or siding hooks — rather than nailing or stapling directly into roofing material or gutters.
• Route cords along fascia boards or gutter edges, not across walkable roof surfaces, so nobody has to step over a cord later.
• Avoid stretching a cord tight between two points; leave a little slack so nothing pulls at a socket or connection.
• Take lights down at the end of the season rather than leaving clips and cords up through spring storms and summer sun, which shortens their life for next year.

What about the ladder work?

Hanging lights along a roofline or gutter almost always means a ladder, and the same basics apply here as to any other outdoor ladder job:

• Set the ladder on firm, level ground, and have someone steady it if you can.
• Extend it well past the roofline you're working from, rather than reaching from the very top rungs.
• Stay well clear of power lines. Keep both yourself and the ladder at least 10 feet away, and never lean a metal ladder anywhere near one.
• Move the ladder rather than stretching or leaning to reach the next section of gutter or fascia.

If the house is more than one story, the roof is steep, or power lines run near where the lights need to go, it's worth having someone experienced do the climbing.

Get the lights up without the ladder work

If you'd rather skip the ladder yourself, book mounting and hanging with an independent local Pro to get holiday lights up along your roofline or gutters, and have any needed GFCI outlet added by a licensed electrician first.

Last updated September 2026.