Your living room light just flickered. Maybe it was quick — a barely noticeable dip that lasted half a second. Or maybe it’s been doing it all evening, every time the aircon kicks in. Either way, you’ve noticed, and now you’re wondering: is this normal, or is my house about to burn down?
The honest answer is — it depends.
Flickering lights range from completely harmless (a loose bulb) to genuinely dangerous (a loose neutral connection that could start a fire). The trick is knowing which type you’re dealing with.
At Connex Electrical, our team — led by owner Darren and lead electrician Lee — diagnoses flickering light issues across North Brisbane and the Moreton Bay region every week. From modern estates in North Lakes to older Queenslanders in Chermside and weatherboard homes in Redcliffe, we’ve seen every cause of flickering lights that Brisbane’s subtropical climate can throw at a house.
This guide will help you figure out what’s causing your lights to flicker, assess whether it’s serious, and decide whether you need a licensed electrician.
How Serious Is It? The Flickering Lights Severity Guide
Not all flickering is created equal. Use this quick-reference table to gauge the urgency of your situation before reading further.
| What You’re Seeing | Likely Severity | What to Do |
|---|---|---|
| One light flickers occasionally — all other lights are fine | 🟢 Low | Check the bulb — it may be loose or failing. Easy DIY fix. |
| One light flickers on a dimmer switch — especially an LED | 🟢 Low | Likely a dimmer compatibility issue. Replace the dimmer or bulb. |
| Lights flicker briefly when the aircon or pool pump kicks in | 🟡 Medium | Voltage dip from a high-draw appliance. Monitor it — may need a dedicated circuit. |
| Multiple lights flicker in the same room or zone | 🟡 Medium | Could be an overloaded circuit or a loose connection. Worth investigating. |
| Lights throughout the house flicker at the same time | 🔴 High | Possible loose neutral, switchboard fault, or supply issue. Call an electrician. |
| Lights dim in some rooms while brightening in others | 🔴 Emergency | Almost certainly a loose neutral connection. Turn off the main switch and call immediately. |
| Flickering with burning smell, buzzing, or warm switches | 🔴 Emergency | Active electrical fault — fire risk. Call an emergency electrician now. |
The 10 Most Common Causes of Flickering Lights in Brisbane Homes
1. A Loose or Failing Light Bulb
Let’s start with the simplest one. A bulb that isn’t screwed in properly — or one that’s nearing the end of its life — will flicker intermittently.
How to check: Turn the light off, wait for the bulb to cool, and gently tighten it in the socket. If it’s an LED downlight with a spring clip fitting, check the clip is fully engaged.
If tightening it fixes the flickering: Problem solved. If not, try a new bulb of the same type.
This accounts for a surprising number of the “flickering lights” calls we get — particularly with older bayonet-cap fittings in Brisbane homes built before the 2000s.
2. Incompatible Dimmer Switch
This is the #1 cause of flickering LED lights — and it catches so many Brisbane homeowners off guard.
Here’s the problem: Older dimmer switches were designed for incandescent or halogen bulbs, which draw much more power than LEDs. When you put a 9W LED on a dimmer designed for a 50W halogen, the dimmer can’t regulate the tiny current properly. Result: flicker, strobe effects, or lights that won’t dim smoothly.
The fix: Install an LED-compatible dimmer switch. Not all dimmers work with all LEDs, so it’s worth checking the manufacturer’s compatibility list. Our electricians can recommend and install the right dimmer for your specific LED downlights or fittings.
Common scenario in North Brisbane: A homeowner in Griffin upgrades all their halogen downlights to LEDs but keeps the old dimmers. The result? Flickering LEDs that drive the whole family mad. Swapping to LED-compatible dimmers fixes it instantly.
3. Voltage Fluctuations (Voltage Dip)
When a high-draw appliance kicks in — like a split-system aircon, a pool pump, or an electric hot water system — it creates a momentary demand spike on your electrical supply. This can cause a brief voltage dip across other circuits, making lights flicker for a split second.
When it’s normal:
- A very brief flicker (less than a second) when a large appliance starts
- Only happens at the moment of startup, not continuously
- Lights return to full brightness immediately
When it’s a problem:
- Flickering lasts several seconds or more
- Lights visibly dim (not just flicker) when appliances run
- Gets worse over time
- Happens with multiple different appliances
The fix for persistent voltage dip: The heavy appliance likely needs its own dedicated circuit. This is especially common with aircon units in Brisbane homes — a split system that was added after the original wiring was installed and shares a circuit with other rooms. A dedicated circuit prevents the aircon’s startup surge from affecting the rest of the house.
4. Loose Wiring Connections — The Hidden Fire Risk
This is where flickering lights go from “annoying” to “potentially dangerous.”
Loose wiring connections — at the switchboard, inside a junction box, behind a power point, or at a light fitting — create an unstable electrical pathway. Current arcs across the gap, generating heat and causing intermittent flickering.
Why this happens in Brisbane:
- Thermal cycling: Brisbane’s temperature swings — cool winter mornings to 35°C+ summer afternoons — cause metals to expand and contract, gradually loosening screw terminals
- Humidity and corrosion: Our subtropical climate accelerates oxidation on copper and brass terminals, especially in older homes
- Ageing connections: Homes from the 1970s-1990s across Aspley, Chermside, Albany Creek, and similar suburbs have connections that have been tightening and loosening with the seasons for decades
- Storm vibration: Severe storms physically vibrate the structure of a home, which can work terminals loose
Warning signs of loose wiring:
- Multiple lights flicker in the same zone
- Flickering gets worse over time
- You notice a burning or “fishy” smell near a power point or light fitting
- A power point faceplate feels warm
- Buzzing or crackling sounds from a switch or fitting
This is a leading cause of electrical fires in Australian homes. If you suspect loose wiring, don’t ignore it. Our team can perform a full electrical safety inspection to check every connection in your home.
5. Overloaded Circuits
If the lights in a specific room flicker when you turn on another appliance in that same room, the circuit may be overloaded — drawing more current than it’s rated for.
Classic North Brisbane scenario: A kitchen in a Mango Hill home with the microwave, toaster, kettle, and air fryer all on the same 20-amp circuit. When the microwave fires up, the lights dip because the circuit is at capacity.
The fix: Redistribute appliances across different circuits, or have additional circuits installed. High-draw kitchen appliances ideally need their own dedicated circuits.
6. Faulty Light Switch
A worn-out light switch can cause the light it controls to flicker. Over time, the internal contacts in switches wear down, especially in high-traffic areas like kitchens, hallways, and bathrooms.
Signs of a faulty switch:
- Light flickers when the switch is bumped or the wall vibrates
- Switch feels loose or “mushy” when pressed
- You hear a faint buzzing from the switch plate
- Difficulty turning the light on or off — needs multiple attempts
Replacing a light switch is a quick job for a licensed electrician. Under Queensland law, even this simple swap must be done by a licensed sparky — it’s not a legal DIY task.
7. Outdated Switchboard
Many older Brisbane homes — particularly those built before the 1990s — still have original switchboards with ceramic fuses, limited circuits, and outdated protection. These switchboards weren’t built for modern electrical loads, and the result is often flickering, tripping, and unreliable power.
An outdated switchboard contributes to flickering because:
- Insufficient circuits mean more devices share each circuit (overloading)
- Old fuse wire deteriorates, creating resistance and voltage instability
- Aged connections corrode and loosen
- No RCBOs means faults aren’t isolated to individual circuits
If your switchboard is more than 20 years old and your lights flicker regularly, a switchboard upgrade is likely the most effective long-term solution.
8. Loose Neutral Connection — The Most Dangerous Cause
We mentioned this in the severity guide above, and it deserves its own section because it’s the most dangerous cause of flickering lights — and the one most often missed by homeowners.
What a loose neutral does:
Your home’s electrical supply relies on a balanced neutral connection. When that neutral is loose, broken, or corroded — at the switchboard, meter box, or in the Energex supply — voltage becomes unbalanced across your circuits.
The result:
- Some lights get too much voltage (brighter than normal)
- Some lights get too little voltage (dimmer than normal, flickering)
- Voltage fluctuates wildly when large appliances switch on
- Appliances can be damaged by overvoltage
The telltale sign: Lights in some rooms are noticeably brighter while lights in other rooms are dimmer or flickering. If both symptoms occur at the same time, it’s almost certainly a neutral fault.
Why this is an emergency:
- Overvoltage destroys appliances — TVs, computers, fridges, and aircon units
- Overheated wiring creates a real fire risk inside your walls
- The fault often worsens suddenly and without warning
- Expensive damage can occur in minutes
What to do: Turn off the main switch at the switchboard. Do not use any appliances. Call a licensed electrician immediately.
9. Problems With the Energex Supply
Sometimes, the flickering has nothing to do with your home’s wiring at all. Issues with the Energex supply network — a damaged transformer, a loose connection at the street pole, or a fault on the supply cable — can cause voltage fluctuations that make your lights flicker.
How to check:
- Ask your neighbours if they’re experiencing the same flickering
- Check the Energex outage tracker at energex.com.au
- Call the Energex faults line on 13 62 62
If it’s a supply-side issue, Energex needs to fix it. But it’s still worth having your home inspected, because a supply fault can sometimes damage switchboard components and connections in your home.
10. Solar Inverter Interaction
With so many North Brisbane homes now running rooftop solar, inverter-related flickering has become increasingly common.
When solar causes flickering:
- Lights flicker around dawn or dusk when the inverter switches between solar and grid power
- Flickering occurs on cloudy days when solar output fluctuates rapidly
- An older or faulty inverter creates harmonic distortion that affects lighting circuits
The fix: Have your solar inverter inspected, and ensure it’s properly configured for your switchboard and grid connection. If the inverter is ageing, a replacement may resolve persistent flickering.
The Flickering Lights Diagnostic Checklist
Work through this checklist to help narrow down the cause before calling an electrician.
| Question | If Yes… |
|---|---|
| Is it only one light that flickers? | Check the bulb first — tighten or replace it |
| Does it only happen on a dimmer? | Likely a dimmer/LED compatibility issue |
| Do lights flicker when a specific appliance starts? | Voltage dip — that appliance may need a dedicated circuit |
| Do multiple lights in one room/zone flicker? | Possible overloaded circuit or loose connection in that zone |
| Do lights throughout the entire house flicker? | Switchboard issue, neutral fault, or supply problem — call an electrician |
| Are some lights brighter while others are dimmer? | Likely a loose neutral — emergency, call now |
| Do you smell burning or hear buzzing? | Possible arcing/loose connection — emergency, call now |
| Did flickering start after a storm? | Moisture ingress or supply damage — needs inspection |
| Did flickering start after renovations? | Possible wiring damage — needs inspection |
| Does flickering get worse over time? | Progressing fault — don’t delay, get it inspected |
What You Can Safely Fix Yourself
There are a few things you can check and fix without calling a sparky:
- Tighten a loose bulb — Turn off the light, let the bulb cool, and screw it in firmly
- Replace a failing bulb — If the bulb is old or the filament/LED is failing, swap it out
- Spread appliances across different power points — If flickering happens when you’re running multiple appliances, try plugging them into different rooms/circuits
- Check if neighbours are affected — If the whole street is flickering, it’s an Energex issue
Everything else requires a licensed electrician under Queensland law. You cannot legally replace a light switch, rewire a connection, or open your switchboard yourself. And frankly, you shouldn’t — even a “simple” electrical task can be deadly if something goes wrong.
When to Call an Electrician
Non-urgent (book within the week):
- One light flickers occasionally despite a new bulb
- Dimmer switch doesn’t play nice with LED bulbs
- You want a general electrical inspection
Urgent (book today):
- Multiple lights flicker throughout the house
- Flickering is getting worse over time
- Lights dim when appliances turn on
- Flickering started after a storm or renovations
- You suspect your switchboard is outdated
Emergency (call now):
- Lights simultaneously dim and brighten in different rooms
- Burning smell, buzzing, or crackling sounds
- Power points or switches feel warm
- You feel tingles or shocks from taps, appliances, or metal surfaces
- Visible sparks or scorch marks at any fitting
Why Brisbane Homes Are Particularly Prone to Flickering Lights
Living in South East Queensland puts extra stress on your home’s electrical system:
- Humidity and salt air corrode connections faster, especially in homes near the coast from Redcliffe to Scarborough
- Intense storm season can damage supply lines, drive moisture into fittings, and physically shake connections loose
- Extreme heat pushes aircon circuits to their limits and accelerates insulation breakdown
- Rapid suburban growth in the Moreton Bay region means some areas have supply infrastructure that struggles during peak demand
- Ageing housing stock across established suburbs like Aspley, Chermside, Kedron, and Albany Creek means older wiring and switchboards are common
- Wildlife — possums and rats gnawing on wiring in roof spaces is a genuine and common problem in North Brisbane
About Connex Electrical
Connex Electrical is based at 173 Campbell Drive, Mango Hill — right in the heart of the Moreton Bay region and directly competing on North Lakes Electrical’s home turf.
The difference? 494 Google reviews at a perfect 5.0 stars. That’s not marketing — that’s hundreds of real North Brisbane homeowners who trusted us with their electrical work and came back to say so.
- QLD Electrical Contractor Licence #92217
- ARC Licence #AU42842
- Owner Darren and lead electrician Lee personally oversee every job
Our team specialises in fault-finding, switchboard upgrades, electrical safety inspections, and emergency callouts across the entire North Brisbane region.
Flickering Lights? Don’t Ignore the Warning Signs.
Flickering lights might be as simple as a loose bulb — or they might be warning you about a dangerous fault that needs immediate attention. Don’t guess. Let a licensed electrician diagnose the cause and make it safe.
📞 Call Connex Electrical on 0474 207 609 for same-day diagnostics and expert fault-finding across North Brisbane and the Moreton Bay region.
We service Mango Hill, North Lakes, Griffin, Kallangur, Petrie, Redcliffe, Margate, Scarborough, Deception Bay, Caboolture, Morayfield, Narangba, Burpengary, Chermside, Aspley, Kedron, Stafford, Albany Creek, Eatons Hill, and all surrounding suburbs.
Frequently Asked Questions
Can flickering lights cause a fire?
Yes, if the cause is a loose wiring connection or an overloaded circuit. Electrical faults — including loose connections that cause arcing — are one of the leading causes of house fires in Australia. If your lights flicker frequently or you notice burning smells, buzzing, or warm switches, call a licensed electrician without delay.
Why do my lights flicker when I turn on the aircon?
When an air conditioner starts up, it draws a large surge of current. If the aircon shares a circuit with your lighting, this surge can cause a brief voltage dip that makes lights flicker. A quick flicker at startup is usually normal. Sustained dimming or flickering while the aircon runs suggests the system needs its own dedicated circuit.
Are flickering LED lights dangerous?
Not necessarily. The most common cause of flickering LEDs is an incompatible dimmer switch. Older dimmers designed for halogen bulbs can’t regulate the tiny current of LEDs properly. Replacing the dimmer with an LED-compatible model usually fixes it. However, if LEDs flicker on a standard (non-dimmer) switch, it may indicate a wiring issue that needs investigation.
Why do my lights flicker during storms?
Brisbane storms can affect your power supply in several ways: lightning strikes can cause voltage surges, strong winds can make overhead power lines sway and contact trees, and rain can drive moisture into outdoor fittings and junction boxes. If flickering persists after the storm passes, have your electrical system inspected for storm damage.
Should I be worried if only one light flickers?
Usually not. A single flickering light is most often caused by a loose bulb, a failing bulb, or a worn light switch. Try tightening or replacing the bulb first. If the flickering continues with a new bulb, the fitting or switch may need attention from an electrician.