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Porch Light Keeps Burning Out? Why Bulbs Die Early

Trapped heat, damp and door slams kill porch bulbs early. Check the fixture first, then switch to an LED bulb made for wet, enclosed fixtures.

By Jamilur Rahman Updated November 5, 2026 · 7 min read

Time
20 min
Cost
Under $20
Difficulty
Easy
A porch wall lantern with its glass cover removed and a burned-out bulb on the porch rail beside it
In this guide
  1. Quick answer
  2. Free vs. permanent fix
  3. What you'll need
  4. Why it happens
  5. Try this first (free)
  6. When free fixes aren't enough
  7. Buy the fix
  8. What to look for on the bulb box
  9. Safety first
  10. What to skip
  11. FAQ
  12. Related problems

Quick answer

If your porch light keeps burning out, the usual causes are heat trapped in a closed fixture, moisture, vibration from slamming doors and a bulb that was not made for outdoor use. Check the wattage label, the socket and the fixture's seal first. Then switch to an LED bulb marked for wet locations and enclosed fixtures, which runs cooler and has no filament to snap.

Free fix vs. permanent fix

Free fix · 20 minutes

Check the fixture and the bulb

  • Turn off the breaker, then make sure the bulb is snug
  • Read the maximum wattage on the fixture label
  • Dry out the fixture and replace a cracked gasket
  • Check the socket for rust or melted plastic

How long it lasts: Fixes a loose bulb, a wet fixture or the wrong wattage. If the old bulb type stays, it keeps dying in the same hot, closed glass.

Most readers choose Permanent fix
Wet-rated LED porch light bulbs (illustration)
Illustration

Wet-rated LED porch bulbs

Old-style bulbs run hot inside a sealed glass fixture, and heat shortens their life. LEDs make far less heat and have no filament to snap when a door slams. A wet-location rating means the base is built for damp, and an enclosed-fixture rating means it can handle trapped heat.

What to get: Wet-rated LED porch light bulbs

How long it lasts: Quality LEDs are rated for many thousands of hours, often several years of nightly use.

Check price on Amazon

As an Amazon Associate I earn from qualifying purchases.

What you'll need

  • Non-contact voltage tester (illustration)
    Illustration

    Non-contact voltage tester

    Confirms the power is off before you touch the socket

    Check price

  • Small flat screwdriver

    To open the fixture and bend a flattened socket tab

    You have it
  • Outdoor silicone caulk (illustration)
    Illustration

    Outdoor silicone caulk

    Seals the top and sides where the fixture meets the wall

    Check price
  • Our pick
    Wet-rated LED bulbs (illustration)
    Illustration

    Wet-rated LED bulbs

    Marked for wet or damp locations and enclosed fixtures

    Check price
  • Wet-rated outdoor wall lantern (illustration)
    Illustration

    Wet-rated outdoor wall lantern

    Only if the old fixture is rusted, cracked or full of water

    Check price

Why it happens

1

Heat trapped in a closed fixture

Many porch lights are a sealed glass box. Incandescent and halogen bulbs run hot, and the heat has nowhere to go. That overheats the filament and the base, and the bulb fails early. Some LEDs fail too if they are not rated for enclosed fixtures.

2

Moisture and damp

Rain and humidity get in through a cracked gasket or a gap at the wall. Water corrodes the socket and can damage the bulb base.

3

Vibration from door slams

A bulb beside a front door takes a small jolt every time the door slams. A filament bulb is fragile, and the filament can snap.

4

A wattage that is too high or a poor connection

A bulb above the fixture's wattage limit overheats the socket. A bulb that is not seated, or a flattened tab in the socket, gives a poor connection, and the arcing wears the base.

5

Power surges and the wrong controls

Voltage spikes shorten bulb life. LED bulbs on a dimmer, motion sensor or photocell that was not made for LEDs can flicker or fail early.

Try this first (free)

Do these in order, starting with the simplest.

  1. Turn off the breaker and test

    Tool used: Non-contact voltage tester

    Flip off the breaker, not just the wall switch. Hold the tester near the socket and wires to confirm the power is off before you touch anything.

    Non-contact voltage tester (illustration)
    Illustration

    Tool for this step

    Non-contact voltage tester · Confirms the power is off before you touch the socket

    Check price on Amazon

  2. Read the fixture label

    Look inside for the maximum wattage and the bulb base size, usually the standard medium screw base. A bulb above the limit heats the socket and shortens bulb life.

  3. Check the bulb and the socket

    Tool used: Small flat screwdriver

    Screw the bulb in until it is snug, not forced. Look for rust, melted plastic or a flattened metal tab at the bottom of the socket. With the power off, bend a flat tab up slightly so it touches the bulb.

  4. Dry the fixture and seal the gap

    Tool used: Outdoor silicone caulk

    Wipe out water, dust and dead bugs. Replace a cracked gasket or lens. Run a bead of caulk across the top and sides where the fixture meets the wall, and leave the bottom open so water can drain out.

    Outdoor silicone caulk (illustration)
    Illustration

    Tool for this step

    Outdoor silicone caulk · Seals the top and sides where the fixture meets the wall

    Check price on Amazon

  5. Fit a wet-rated LED bulb

    Tool used: Wet-rated LED bulbs

    Choose an LED marked for wet or damp locations and for enclosed fixtures. Give it a few weeks. If it still dies, the problem is the fixture or the wiring, not the bulb.

    Wet-rated LED bulbs (illustration)
    Illustration

    Tool for this step

    Wet-rated LED bulbs · Marked for wet or damp locations and enclosed fixtures

    Check price on Amazon

When free fixes aren't enough

If you have fitted a wet-rated LED and tightened the socket, and the bulb still dies within weeks, the fixture or the wiring is the likely cause. Warning signs are water inside the fixture again, a socket that is brown or melted, other lights on the same circuit flickering, a burning smell or a breaker that trips. In that case, leave the breaker off and call an electrician. A fixture that is badly rusted or cracked is worth replacing with a wet-rated one.

Buy the fix

Still stuck after the free fixes? These are the products we would look at.

Our picks compared
PickProductFixesWho it's forBuy
Best pick
Wet-rated LED porch light bulbs (illustration)
Illustration
Wet-rated LED porch light bulbs
bulbs that burn out from heat, damp and shaking Anyone replacing the same porch bulb every few months. Check price
Upgrade pick
Wet-rated outdoor wall lantern fixture (illustration)
Illustration
Wet-rated outdoor wall lantern fixture
a cracked, rusted or leaky fixture that keeps killing bulbs Anyone whose fixture is old, loose or collects water. Check price
Best pick
Wet-rated LED porch light bulbs (illustration)
Illustration

Wet-rated LED porch light bulbs

Fixes: bulbs that burn out from heat, damp and shaking

Look for: Marked suitable for wet or damp locations; Marked suitable for enclosed fixtures; A base that matches your socket, usually standard; Dimmable only if your switch is a dimmer.

Who it's for
Anyone replacing the same porch bulb every few months.
Honest downside
The fixture shows water, rust or burn marks. Fix the fixture first.
Check price on Amazon
Upgrade pick
Wet-rated outdoor wall lantern fixture (illustration)
Illustration

Wet-rated outdoor wall lantern fixture

Fixes: a cracked, rusted or leaky fixture that keeps killing bulbs

Look for: A wet-location rating on the label; A gasket or a sealed back plate; A rust-resistant finish; A size that covers the old mounting holes.

Who it's for
Anyone whose fixture is old, loose or collects water.
Honest downside
You are not comfortable working with wiring. Hire an electrician for the swap.
Check price on Amazon

As an Amazon Associate I earn from qualifying purchases. We don't show prices because they change, so use the button to see today's price.

How we picked: How we picked: this page is based on lighting and electrical safety guides, bulb packaging standards for wet and enclosed locations, and the problems and fixes people report in reviews. We do not test products by hand.

What to look for on the bulb box

  • Wet or damp location: the bulb is built for rain and humidity.
  • Enclosed fixture: it is safe in a glass-covered fixture that traps heat.
  • Base type: match the base to the socket.
  • Dimmable: only if your switch is a dimmer. Otherwise it is unneeded.
  • Hours rated: look for a long rated life, in the thousands of hours.

Safety first

Turn off the breaker before you touch the socket, and use a sturdy ladder on level ground. Never work on a fixture with wet hands or in rain. If you see scorching, melted wire insulation or hear buzzing from the fixture, stop and call an electrician.

What to skip

Higher-wattage bulbs

A brighter bulb in a fixture rated for less wattage overheats the socket and wiring and is a fire risk. If you want more light, buy an LED that is brighter but still under the fixture's limit. Check the actual watts on the box, not the old-bulb equivalent.

Frequently asked questions

Why does my porch light keep burning out?
The usual causes are trapped heat, moisture, vibration from slamming doors and a bulb that is not made for outdoor use. Check the wattage and the socket, dry out the fixture and switch to a wet-rated LED.
Why does my LED porch light burn out too?
Cheap LEDs that are not rated for enclosed or wet fixtures overheat, and their electronics fail. A dimmer, motion sensor or photocell that is not LED-compatible also shortens life. Look for the damp-location and enclosed-fixture marks on the box.
How long should a porch bulb last?
An old-style bulb is typically rated around a thousand hours, and less when it is overheated. Quality LEDs are rated for many thousands of hours. If a bulb fails within a few weeks, something other than the bulb is wrong.
When is a burned-out bulb a wiring problem?
If bulbs die within weeks even with a new LED, other lights on the circuit flicker, the socket is scorched or a breaker trips, switch off the power at the breaker and call an electrician.

As an Amazon Associate I earn from qualifying purchases. Affiliate disclosure

Wet-rated LED porch light bulbs (illustration)
Illustration

Our pick: Wet-rated LED porch light bulbs

Check price