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Lights Not Working But Sockets Are Fine
All your sockets work perfectly but the lights have gone out across the house.
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What's happening?
When lights stop working but sockets remain powered, the lighting circuit has a fault while socket circuits are unaffected. UK homes typically have one or two dedicated lighting circuits separate from socket circuits.
What usually causes it?
- MCB for the lighting circuit has tripped
- Faulty light fitting causing the circuit to trip
- Loose connection at a ceiling rose or junction box
- Failed LED driver in a light fitting
- Damaged cable in the loft or ceiling void
Is it dangerous?
Not an emergency, but you should not ignore it. A tripped lighting circuit MCB indicates a fault that needs diagnosis. Working in the dark can itself be a safety risk, so use torches and be careful on stairs.
Can I fix it myself?
Check the consumer unit for a tripped lighting MCB and try resetting it. If it trips immediately, switch off all light switches and try again. Then turn lights on one at a time to identify which one causes the trip. Check that bulbs are not loose or the wrong type for the fitting.
When should you call an electrician?
Call an electrician if the MCB trips with all switches off, if you cannot identify the faulty light, or if the problem started after any DIY work. Lighting circuit work should always be done by a qualified person.
What will the electrician actually do?
- Test the lighting circuit for faults
- Check each light fitting, switch, and junction box on the circuit
- Inspect wiring in the loft and ceiling voids
- Replace faulty fittings, switches, or connections
- Test the circuit after repair to confirm it is safe
What will it cost to fix?
£80–£200
Most lighting faults are resolved with a simple repair. Costs increase if access to hidden wiring is needed.
Find an electricianFrequently asked questions
We’re happy to answer all your questions.
Why have all my lights stopped working?
The lighting circuit MCB has probably tripped due to a fault on the circuit — typically a faulty light fitting or loose connection.
Can I change light fittings myself?
Simple like-for-like replacements are generally OK for competent DIYers, but any changes to the circuit itself should be done by a qualified electrician. If you are not confident, always call a professional.
Could it just be the bulbs?
If only one light is off, it could be the bulb. But if all lights on a circuit are out, it is the circuit rather than individual bulbs.
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