Replacing a bulb is normal. Replacing the same bulb every few weeks is not, and when it keeps happening, the bulb is hardly ever the real culprit. Something about that fixture, that circuit, or your power is cutting its life short. Here are the usual reasons, what you can sort out yourself, and the one pattern that means it is time to call.
Voltage that runs too high
A bulb is built for a certain voltage. Feed it more and it burns brighter, hotter, and dies far sooner, whether it is an old filament bulb or a modern LED with electronics inside. On a grid like ours, where the voltage can swing, that extra stress piles up. If bulbs all over the house are dying early and burning noticeably bright, voltage is a strong suspect, and that is one for an electrician to measure rather than guess at. The Wikipedia incandescent light bulb page explains how a filament works.
A loose or worn socket
A bulb needs a firm, clean connection at the socket. If the little contact tab at the bottom is flattened or corroded, or the bulb is not seated right, the current flickers and arcs in tiny bursts, and that heat kills the bulb fast. Two easy things to check. Screw the bulb in snugly but not cranked down, because over-tightening can flatten that tab. And with the power off, look for a socket that is blackened or corroded. A fixture that eats bulbs no matter what you put in it has usually got a tired socket.
Vibration
Some bulbs get shaken to death. A fixture on a ceiling fan, by a garage door, on a stairwell that gets pounded up and down, or under a floor that vibrates will snap filaments and stress LED parts long before their time. The fix is easy: put a rough-service or vibration-rated bulb in those spots, or an LED, which takes shaking far better than a delicate filament.
Heat and enclosed fixtures
Heat is hard on bulbs, especially LEDs and CFLs, whose electronics hate being cooked. Pack a bulb into a small sealed fixture with no airflow and it runs hot and fails early. If the fixture is fully enclosed, use a bulb rated for enclosed fixtures, and never put a higher-wattage bulb in a fixture than it is marked for.
Dimmer mismatch
If the bulbs dying are on a dimmer, the dimmer may be the trouble. A regular LED that is not labelled dimmable will struggle and fail on a dimmer circuit, and an old dimmer built for filament bulbs often does not get along with LEDs. Pair dimmable LED bulbs with an LED-compatible dimmer and the early failures usually stop.
When it is time to call
This is the pattern that matters. If one fixture eats bulbs, it is almost always that fixture or its socket. But if bulbs are dying early across several fixtures, or the whole house, especially alongside flickering or lights that go bright then dim, that points past the bulbs to your wiring or your voltage, maybe a loose neutral. You cannot buy your way out of that with a new bulb, and it is worth having checked. We cover the flickering side of it in when flickering lights are serious and when they are not, and sorting fixtures, sockets, and the wiring behind them is lighting installation work.
The takeaway
When bulbs keep burning out, look past the bulb. One hungry fixture usually means a loose or worn socket, vibration, heat, or a dimmer mismatch, and most of those you can fix yourself by seating the bulb properly, matching it to the fixture, or choosing the right type. But bulbs dying across the house, with flickering or bright-and-dim lights, points to voltage or wiring behind the wall. That is the moment to call an electrician instead of buying another bulb.
Related reading
- When flickering lights are serious and when they are not for the flickering that often comes with early bulb failure.
- Why do my lights flicker when the AC turns on? for a related voltage clue.
- What to do when half the house loses power for the lost-neutral pattern that can cook bulbs.
- Lighting installation to fix tired fixtures, sockets, and the wiring behind them.
Why do my light bulbs keep burning out so fast?
Usually the fixture, circuit, or your power is to blame, not the bulb. Common causes are voltage running too high, a loose or worn socket that arcs, vibration from fans or doors, trapped heat in an enclosed fixture, or a bulb that is not compatible with a dimmer. Pinning down which one is the key to stopping it.
Can high voltage cause bulbs to burn out early?
Yes. A bulb built for a certain voltage burns brighter, hotter, and dies sooner when fed more than that, and on a grid where voltage swings, the stress adds up. If bulbs across the whole house die early and burn noticeably bright, have an electrician measure your voltage rather than guessing.
Does screwing a bulb in too tight make it burn out?
It can. Over-tightening a bulb can flatten the small contact tab at the bottom of the socket, leading to a poor, arcing connection that makes heat and kills bulbs early. Screw bulbs in snugly but not cranked down, and if a socket looks blackened or corroded, the fixture likely needs attention.
Why do bulbs in my ceiling fan or stairwell fail quickly?
Vibration. Fixtures on ceiling fans, near garage doors, or in high-traffic spots get shaken constantly, which breaks delicate filaments and stresses LED parts. Use a rough-service or vibration-rated bulb in those spots, or an LED, which tolerates shaking far better than a filament bulb.
Why do my LED bulbs fail on a dimmer switch?
Because of a mismatch. A regular LED that is not labelled dimmable will struggle and fail on a dimmer, and an old dimmer designed for filament bulbs often does not work well with LEDs. Use dimmable LED bulbs with an LED-compatible dimmer and the early failures usually stop.
When should I call an electrician about bulbs burning out?
When bulbs die early across several fixtures or the whole house, especially with flickering or lights going bright and dim. That points past the bulbs to a wiring or voltage problem, possibly a loose neutral, which a new bulb cannot fix and which should be checked by an electrician.
The next step
If you are forever on a chair changing the same bulb, let us find out why. Get a free quote or message us, and we will check the fixture, the wiring, and your voltage so your bulbs last as long as they should.