Why Your Lamp Bulb Keeps Burning Out and How to Fix It

Quick answer

Most bulbs that die early are killed by heat, vibration, or voltage, not by the bulb itself. Check the socket for heat marks, confirm the fixture's voltage rating, and test the bulb in a second fixture before you buy a replacement. If the socket is discolored or the wiring is loose, stop using the fixture and have it checked by an electrician.

Start with the socket, not the bulb

Before you blame the bulb, look inside the socket. A healthy socket looks clean and matte. A failing one shows brown scorching, a brittle or cracked insulator, or a center contact that has flattened and no longer springs back. Any of those signs means the socket is the problem, and a new bulb will fail the same way.

Heat is the usual culprit. A bulb that runs hot in an enclosed shade or a tight recessed fitting cooks the socket over months. If the shade or fixture feels too hot to touch after an hour, the bulb is being overdriven for that enclosure. Move to a lower-wattage or cooler-running bulb, or open up the fixture with a shade that lets air move.

• Scorch marks or a burnt smell: replace the socket or the fixture, not the bulb.
• Loose or wobbly bulb: bend the center contact back gently with the power off, or replace the socket.
• Hot shade: switch to a cooler bulb or a more open shade.

Check voltage and dimmer compatibility

A bulb rated for the wrong voltage will burn out fast, sometimes within days. In North America, household fixtures run on 120V. If you bought a 230V bulb online or brought one back from Europe, it will fail quickly even though it fits the socket. Check the printing on the bulb base before you install it.

Dimmers cause a different kind of failure. A dimmer that isn't compatible with the bulb's driver can cause flicker, buzzing, and premature death. If bulbs fail only on one dimmed circuit, the dimmer is the likely cause. Swap to a dimmer rated for the bulb type, or move the bulb to a non-dimmed fixture to confirm.

• Confirm the bulb says 120V for US fixtures.
• Test the bulb on a non-dimmed circuit to isolate the dimmer.
• Match the dimmer to the bulb's driver, not just the wattage.

Vibration and physical stress

Bulbs in ceiling fans, garage door openers, or above a washing machine live with constant vibration. That shakes the filament or driver until it breaks. If a bulb dies in the same fixture every few months but lasts elsewhere, vibration is the cause. Use a bulb rated for vibration, or move the fixture.

Over-tightening a bulb can also crack the base or stress the glass. Screw it in until it just makes contact, then stop. If the bulb wobbles after that, the socket is worn and needs replacing.

When the fixture itself is the problem

If you've ruled out the bulb, the socket, the voltage, and the dimmer, the fixture's wiring may be loose or undersized. A fixture that flickers when you touch the cord or switch has an internal connection issue. Stop using it and have an electrician look at it. This is not a bulb problem and no bulb will fix it.

For fixtures that are simply old and run hot, a modern LED bulb that produces less heat can extend socket life, but it won't repair damaged contacts. If the socket is already scorched, replacement is the only safe option.

Diagnosis: match the symptom to the cause

• Bulb dies in one fixture but lasts in others: The fixture is overheating, vibrating, or has a loose socket. Inspect the socket for scorch marks and check for vibration sources like fans or doors. If the socket is discolored, replace the fixture. If it's clean, try a cooler-running bulb.
• Bulb dies quickly on a dimmer: The dimmer and bulb driver are incompatible. Test the bulb on a non-dimmed circuit. If it lasts, the dimmer is the problem. Replace the dimmer with one rated for your bulb type, or move the bulb to a non-dimmed fixture.
• Bulb dies within days of installation: Check the voltage printed on the base. A 230V bulb in a 120V fixture will fail fast. Also check for a cracked base from over-tightening. Match the voltage to your home. If it's correct and the bulb still fails, the socket may be worn.
• Socket is hot, scorched, or smells burnt: This is a fire risk. Stop using the fixture immediately. Do not install another bulb. Have an electrician inspect the wiring, or replace the fixture with a new one.

Bulbs and fixtures built to last

• Oval E26 LED Bulb - RT: The Oval E26 LED Bulb - RT has a soft, rounded shape and works equally well in a pendant or a touch lamp. A cooler-running LED reduces the heat that kills sockets, and its shape suits open fixtures where air can circulate.
• Lochan Wall Light in Brass + Oval Dim to Warm - RT: Lochan Wall Light in Brass + Oval Dim to Warm is wet-rated IP44 and available in Brass and Graphite finishes. If your old fixture's socket is scorched, this is a direct replacement that is safe for bathrooms and outdoor spaces.