Most flicker is harmless. Some of it is your wiring asking for attention. Here's how to tell.
Most of the time, lights flicker for harmless reasons. Occasionally it's your wiring asking for attention. Here's how to tell which is which.
Usually harmless
- An LED bulb that isn't compatible with an older dimmer.
- A bulb not screwed in fully, or near the end of its life.
- A brief dip when a big appliance like a kettle or shower switches on.
Worth checking
Flicker across several rooms at once, lights that dim when an appliance runs constantly, or any flicker that comes with a buzzing sound or a warm switch — those point to a loose connection somewhere, which can generate heat. That's one to look at promptly.
If in doubt
You can swap a bulb or try a dimmer-rated LED yourself. But if it's widespread, paired with warmth or smell, or you're simply not sure, switch the circuit off and call a qualified electrician. It's usually a quick fix — and cheap peace of mind.
