Why Your Lights Keep Flickering in Singapore – Causes, Fixes & Costs

Flickering lights are annoying — and sometimes a sign of something serious. If your lights keep dimming and brightening, especially in your HDB flat or condo, you need to know what's causing it and whether it's safe to DIY or time to call an EMA-certified electrician.

In this guide, we'll break down the 5 most common causes of flickering lights in Singapore homes, what you can safely fix yourself, and when to call a professional. Plus, we'll give you exact costs for electrical repairs.

What Causes Lights to Flicker in Singapore Homes?

1. Loose Light Bulbs or Fittings

This is the easiest to fix. If your light bulb isn't screwed in tightly, it will flicker. Same goes for a loose bulb socket or loose wire connections inside the light fixture.

How to fix: Turn off the light, wait 5 minutes, then gently tighten the bulb. If the bulb is broken, replace it with the same wattage.

Cost: $0–$15 (new bulb only)

2. Overloaded Circuit Breaker (Most Common in HDB)

HDB flats often have older electrical panels. If you're running too many high-power devices on one circuit (e.g., air-con + water heater + multiple appliances), the circuit can't handle the load and causes lights to flicker.

Warning signs:

• Lights flicker when you turn on the air-con or water heater

• Circuit breaker trips frequently

• Burning smell near the switchboard

How to fix: Unplug some devices from that circuit, or spread them across different sockets on different circuits. If this doesn't work, you likely need a circuit upgrade.

Cost: $150–$400 for a licensed electrician to diagnose and redistribute loads; $500–$1,200 if you need new circuits installed.

3. Loose Wiring in the Switchboard or Wall

Over time, electrical wires inside walls or switchboards can loosen due to vibration (especially near construction or road noise) or age. Loose wires cause intermittent flickering.

Warning signs:

• Flickering only happens at certain times of day

• Flickering is worst in one room

• Burning smell or scorch marks near switches

How to fix: Do NOT attempt this yourself. Loose internal wiring is a fire risk. Call a PUB-licensed electrician immediately.

Cost: $200–$500 for diagnosis and tightening connections.

4. Faulty Main Switch or Dimmer Switch

A broken dimmer switch or worn main switch can cause lights to flicker. Dimmers especially degrade over time and stop working properly.

How to fix: Replace the switch (or dimmer). If you're comfortable with electrical work and the power is OFF, you can do this yourself. Otherwise, hire a licensed electrician.

Cost: $30–$80 for a new switch; $80–$200 if a professional installs it.

5. PUB Utility Issue (Supply Voltage Fluctuation)

Rarely, flickering is caused by PUB (Public Utilities Board) supply problems in your area. If your entire flat flickers and multiple neighbors have the same issue, contact PUB to report unstable voltage.

How to confirm: Check if neighbors' lights flicker too, or ask your condo management.

Cost: Free (PUB will investigate at no cost).

When Should You Call a Licensed Electrician?

Call NOW if:

• You smell burning near the switchboard

• Flickering is constant and affects multiple rooms

• Circuit breaker trips frequently

• You see scorch marks or black spots on switches

Call within a week if:

• Flickering only affects one room

• It started after you plugged in a new appliance

• You're unsure what's causing it

Electrical Repair Cost Guide in Singapore

| Issue | Cost Range | Typical Fix |

|-------|-----------|------------|

| Loose bulb / socket replacement | $0–$30 | DIY or quick service call |

| Switch replacement | $80–$200 | Licensed electrician |

| Circuit overload (redistribution) | $150–$400 | Licensed electrician |

| New circuit installation | $500–$1,200 | Licensed electrician + PUB permit |

| Switchboard inspection | $100–$250 | Licensed electrician |

| Loose wire repair | $200–$500 | Licensed electrician (urgent) |

Prices vary by contractor and complexity. Always get a quote before work starts.

Frequently Asked Questions

Are flickering lights dangerous?

It depends. Flickering caused by a loose bulb is harmless. But flickering from loose wiring, overloaded circuits, or faulty switches is a fire and electrocution risk. If you're unsure, get a professional inspection — it's worth the peace of mind.

Can I fix flickering lights myself?

Yes, for simple issues: tighten the bulb, replace a broken bulb, or replace a dimmer switch (if power is OFF). Never open your switchboard or touch hidden wiring without training. If it's inside walls or your electrical panel, hire a licensed electrician.

How much does it cost to diagnose the problem?

Most licensed electricians charge $80–$150 for a diagnostic visit. Many offer this free if you hire them to fix it. AOT Trinity charges a flat diagnostic fee, which we deduct from the repair cost.

Why do HDB lights flicker more than condo lights?

HDB flats are older and often have smaller electrical panels and older wiring. Condos are newer and better equipped to handle multiple high-power appliances. If you're in an HDB and lights flicker when you run the air-con, your circuit is likely overloaded — an upgrade is usually needed.

Ready to Fix Your Flickering Lights?

If you've ruled out loose bulbs and your lights still flicker, it's time to call a professional. AOT Trinity is a PUB-licensed, EMA-certified and BCA-registered electrical contractor serving Singapore HDBs, condos, and landed homes.

We offer:

• Free quotes for electrical repairs

• Same-day emergency service (if available)

• Transparent pricing with no hidden charges

• Full warranty on all electrical work

Get a quote today:

• WhatsApp: +65 8151 8857 (fastest response)

• Call: +65 6816 2462

• Website: https://www.aotrinitysg.com

Don't ignore flickering lights — a quick $100 diagnostic visit today could save you from a $5,000 fire damage bill tomorrow.

Stay safe, stay lit! 💡