What to check first
Ask yourself one question before you buy a replacement: is this the first bulb this fitting has lost in years, or has this exact fitting blown more than one bulb recently? The answer changes everything else you do next.
Check the bulb's wattage against what the fitting is rated for — a bulb rated higher than the fitting allows will run hot and fail early, sometimes repeatedly. This information is usually printed on a small label inside or near the fitting.
If the bulb blew right after a power outage, brownout or thunderstorm, note that — a voltage spike affecting the whole home is a different pattern from one fitting quietly wearing out its bulbs one after another.
The likely causes, in order
End of the bulb's rated life (most common). The most common cause is simply the end of the bulb's rated life — even a long-life LED eventually fails, and a single bulb blowing after long, normal use in one fitting usually needs nothing more than a replacement bulb of the same type.
A voltage spike or surge. The second cause is a voltage spike or surge, often after a power outage or a lightning storm, which can blow a bulb (or several at once across the home) even if the bulb was new. This points to the supply, not the fitting, and is worth noting if it happens right after an outage.
A fault in the fitting or its wiring. The third cause is a fault in the fitting or its wiring — a loose connection, the wrong wattage, or a failing dimmer — which shows up as the same fitting blowing bulb after bulb. This is wiring work, restricted in Singapore to a Licensed Electrical Worker (LEW) registered with EMA.
A cheap or mismatched bulb. If the bulb was an unusually cheap or unbranded LED, or the wrong type for a dimmer switch it's paired with, that mismatch alone can cause early failure without any fault in the fitting at all. Try a known brand of the correct type before assuming the wiring is at fault.
When to call, and who
For a single blown bulb in an otherwise reliable fitting, no call is needed — replace it with the same wattage and type and move on. Any bulb swap that doesn't involve opening the fitting itself needs no licence.
Stop and call an electrician rather than replacing another bulb if the fitting smells of burning, the new bulb blows within minutes of being installed, or the switch or fitting feels warm — that is a wiring fault, and another bulb will likely blow the same way.
What it costs
Ask two or three for a written quote if the fitting itself is the problem.
Tell the electrician how many bulbs the fitting has gone through and over what period, and whether it followed a power outage — that history is often more useful to them than seeing the blown bulb itself.
Ask whether the quote covers diagnosis only or diagnosis plus the fitting repair, since a wiring fix and a full fitting replacement can be priced very differently for the same starting symptom.
Who to call, and how to judge them
Any work on the wiring inside a light fitting or its switch in Singapore is restricted to a Licensed Electrical Worker (LEW) registered with EMA; a single bulb swap needs no licence, but opening the fitting does.
Ask separately whether the technician attending holds the LEW licence, since the two checks are not the same thing.
Prefer an electrician who asks how many bulbs the fitting has lost and over what timeframe, over one who quotes a fitting replacement before hearing the history. For a fitting that keeps blowing bulbs, an electrician checks the fitting's wattage rating against the bulb used, the switch (including any dimmer), and the wiring feeding it, before installing a like-for-like replacement bulb to confirm the fix holds.
Frequently asked questions
Why does my light bulb keep blowing?
If it's one bulb after long, normal use, that's usually just the end of the bulb's rated life; if the same fitting keeps blowing bulb after bulb, the likely cause is a fault in the fitting or its wiring, which needs an electrician.
Is a blown light bulb dangerous?
A single blown bulb on its own is not dangerous, but stop and call an electrician rather than replacing another bulb if the fitting smells of burning, the new bulb blows within minutes, or the switch or fitting feels warm.
Do I need an electrician just to change a bulb?
No — a single bulb swap needs no licence and no electrician; a licence is only needed for work inside the fitting or its wiring, which is a Licensed Electrical Worker's job in Singapore.
Sources
- Philips Lighting Singapore, consumer range page (fetched 15 Sep 2026)
- EMA, "Electricians Licence" (Licensed Electrical Worker) (fetched 15 Sep 2026)
- EMA, "Electrical Safety" (fetched 15 Sep 2026)
Compare electricians providers and give each the same three answers: how many bulbs the fitting has lost, over what timeframe, and whether it started after a power outage.
