When a fire, power outage, or another critical event strikes, clearly lit exit paths are a lifeline for any property. Emergency exit lights guide building occupants to safety, preventing panic and potential tragedy in low-visibility conditions. However, these silent sentinels are often taken for granted until the moment they are needed most, and they fail.
Emergency exit lights fail primarily due to battery failure, burnt-out bulbs, faulty wiring, and a lack of regular maintenance. These common, preventable issues can leave your commercial property in Adelaide vulnerable during a power outage or fire, compromising occupant safety and building compliance.
Understanding the specific reasons for failure is the first step toward prevention. As NECA-accredited electricians, H. Irwin Electrical specialises in helping Adelaide business owners and facility managers ensure their emergency lighting is always operational through professional inspection, testing, and maintenance services.
The Critical Role of Emergency Exit Lighting
Why risk a non-compliant building over a simple light? Because emergency exit lighting isn’t just another fixture; it’s a fundamental system that stands between order and chaos for three critical reasons:
- Life Safety: Their primary role is to illuminate escape routes and exit doors during an emergency, guiding occupants to safety swiftly and safely when main power fails.
- Legal Compliance: In Australia, regular emergency light testing and maintenance of emergency lighting are not optional. They are legal requirements under Australian Standards (AS/NZS 2293.1 and 2293.2). Failure to maintain these systems can result in significant fines and liability in the event of an incident.
- Risk Mitigation: A non-functional exit light creates a dangerous blind spot in an escape path, increasing the risk of injury and putting the safety of everyone in the building at stake.
Common Reasons for Emergency Exit Light Failure
So, why did your exit sign stop working? The causes can typically be traced back to a few key areas. Here’s a detailed breakdown of the most common reasons for emergency exit light failure:
| Common Failure | Why? |
| Battery Failure | The #1 cause of failure. Batteries degrade, lose capacity, and can fail due to age, lack of use, or faulty charging circuits. |
| Burnt-Out Bulbs/LEDs | All light sources have a finite lifespan and will eventually fail, rendering the unit useless. |
| Faulty Wiring & Connections | Loose, corroded, or damaged wiring can interrupt power to the unit, preventing it from charging or activating. |
| Lack of Maintenance | Without regular testing, minor issues go unnoticed and escalate into complete system failures. |
| Environmental Factors | Dust, dirt, extreme temperatures, and moisture can cause corrosion and damage internal components. |
| Physical Damage | Units can be knocked out of alignment, broken, or removed during cleaning, maintenance, or renovations. |
Battery Failure
This is, by far, the most common culprit. The backup battery is the heart of the emergency light, and it’s designed to have a limited lifespan, which is typically 3-4 years. Over time, batteries naturally degrade, lose their ability to hold a charge, and can fail completely. A lack of regular discharge testing or a faulty charging circuit within the unit can accelerate this process.
Burnt-Out Bulbs/LEDs
While modern LED exit signs have a much longer lifespan, all light sources eventually fail. A burnt-out main bulb or LED will leave the sign dark during a power outage. Older units with incandescent bulbs are particularly prone to this. Upgrading to modern, energy-efficient LED fixtures not only reduces this risk but also lowers your energy costs.
Faulty Wiring and Connections
Behind the scenes, a network of wires powers your emergency lights. Loose connections, corroded terminals, or damaged cables can interrupt the power supply, preventing the unit from charging its battery. And if the emergency light is not on a dedicated circuit as per Australian standards, it could be accidentally switched off, rendering it useless in an emergency.
Lack of Maintenance
Neglect is a major cause of failure. Australian standards mandate specific testing routines for a reason. Without monthly flick tests and annual duration tests, problems like a dying battery or a faulty charger remain hidden until it’s too late. Regular maintenance is your first and best defence against failure.
Environmental Factors
Emergency lights installed in harsh environments are more susceptible to failure, like dusty warehouses, humid basements, or unheated storage areas. Dust and dirt can obscure the sign, while moisture and extreme temperatures can cause corrosion on circuit boards and battery terminals, leading to premature failure.
Physical Damage
These fixtures can be inadvertently damaged by cleaning crews, forklifts, or during building renovations. Even a slight knock can dislodge internal components, break the housing, or misalign the unit, creating a dangerous gap in your emergency lighting coverage.
How to Test and Maintain Your Emergency Exit Lights
Preventing failures comes down to a disciplined maintenance schedule. Property managers can ensure reliability by sticking to this basic routine:
- Monthly Functional Test: Use the “test” button on each unit to simulate a power failure. The emergency light should activate and remain on for at least 30 seconds. If it doesn’t, it needs service.
- Annual Duration Test: A licensed electrician should perform a full 90-minute test by disconnecting the main power to the units. This verifies that the battery and system can provide illumination for the legally required duration.
- Regular Visual Inspections: Periodically check all units for obvious signs of damage, dirt buildup, or obstructions that could block the light.
- Proactive Battery Replacement: Don’t wait for batteries to fail. Implement a schedule to replace them every 3-4 years, or as recommended by the manufacturer.
- Meticulous Record Keeping: Document every test, inspection, and repair. This logbook is (1) a compliance requirement and (2) a valuable tool for tracking the health of your system.
When to Call a Professional Electrician
While basic visual checks and monthly button tests can be done in-house, some situations demand the expertise of a licensed commercial electrician. You should call H. Irwin Electrical if:
- Any unit fails to activate during your monthly self-testing.
- You discover a battery that cannot hold a charge during the annual 90-minute test.
- You need wiring repairs, new installations, or suspect a circuit issue.
- It’s time for your mandatory annual 90-minute test and compliance certification.
- You are unsure about your system’s overall compliance, coverage, or safety status.
- You need wiring repairs, new emergency exit light installation, or advanced electrical fault finding for persistent or hidden circuit issues.
Frequently Asked Questions
How often should emergency exit lights be tested?
In Adelaide, Australian Standards (AS/NZS 2293.2) require emergency lighting to be tested every six months. This involves a 90-minute duration test to ensure the battery backup lasts the required time. A brief functional test (e.g., using the test button) is also recommended monthly.
What is the most common reason for emergency light failure?
Battery failure is, by far, the most common cause of failure. Batteries degrade over time, lose their ability to hold a charge, and can fail due to age, lack of maintenance, or issues with the charging unit.
How much does emergency lighting testing cost in Adelaide?
The cost can vary based on the size of your premises and the number of lights, but for most properties in Adelaide, emergency lighting testing typically costs between $200 and $500. This generally covers the mandatory six-monthly testing and compliance report.
My emergency light has a green power light, but it doesn’t work when I test it. What’s wrong?
A green power light only indicates that the unit is receiving mains power. If it doesn’t activate during a test, the issue is likely with the backup battery, which may be dead and unable to hold a charge, or there could be a fault in the internal charging circuitry.
How do I know if I need a repair or a full system upgrade?
This depends on your system’s age, performance, and compliance. If you have an older system with repeated failures, outdated technology, or one that no longer meets AS2293 standards, an upgrade may be more cost-effective. For newer systems with isolated issues like a single flat battery or damaged fitting, a repair is often sufficient.
Is it a legal requirement to have emergency exit lights?
Yes. For almost all commercial and multi-residential buildings, emergency lighting is a legal requirement under the Australian Standards (AS/NZS 2293) and the Building Code of Australia. Regular testing and maintenance are mandatory to ensure compliance and occupant safety.
Ensure Your Building Is Safe and Compliant
Don’t wait for an emergency to discover your exit lights have failed. The risks of non-compliance and, more importantly, the threat to human life are far too great. The licensed and NECA-accredited electricians at H. Irwin Electrical can provide comprehensive emergency lighting inspections, testing, and repairs for your Adelaide business.
Contact us today to schedule your service and ensure your property is safe and compliant.
