Airfield lighting keeps runways, taxiways, and approach paths safe for every aircraft that takes off or lands, especially at night or during low-visibility conditions. When these lighting systems fail, even momentarily, pilots lose important visual cues that help them navigate the airfield, posing safety concerns that can delay flights, increase operational risks, and lead to costly repairs if not addressed early. Let’s explore the most common causes of airfield lighting failures and how you can prevent them.
- Electrical and Wiring Issues
- Environmental and Weather-Related Causes
- Mechanical and Structural Problems
- Preventive Maintenance and Monitoring
- Choose Hali-Brite for Reliable, FAA-Compliant Airfield Lighting
Electrical and Wiring Issues
Since airfield lighting systems rely on consistent power and stable electrical connections, even minor irregularities can affect the performance of runway lights, taxiway lights, the airport beacon, and other lighting fixtures.
Connection Failures
Loose or poorly installed connections can interrupt the steady flow of current needed for consistent light output. Corrosion, particularly in older or poorly sealed junction boxes, can eat away at terminals and wiring. When corrosion progresses, you might notice flickering or complete light loss. Meanwhile, voltage irregularities, whether from faulty regulators or load imbalance, can reduce light intensity or trigger premature failure of conventional lamps and LED lighting systems.
Grounding Problems
Grounding ensures electrical stability, prevents surges, and regulates voltage. When grounding is inadequate or compromised, you might see dim lights, erratic intensity levels, or repeated tripping of circuit protection devices. Moreover, poor grounding increases the risk of electrical noise entering the circuit, which can interfere with sensors, air traffic control systems, or lighting regulators. In severe cases, a grounding failure can trigger a full circuit outage, taking down multiple lights at once.
Cabling Degradation
Many airfield lighting systems rely on cables buried for years, sometimes decades. Over time, these cables face natural wear. Insulation breaks down, moisture seeps in, or soil movement causes stress on connectors. When underground cables begin to degrade, you might notice intermittent outages, voltage drops, or inconsistent operation across entire lighting circuits. Repeated freeze-thaw cycles, especially in colder regions, put additional stress on cabling, accelerating wear and tear.
Environmental and Weather-Related Causes
Airfield lighting systems are constantly exposed to the elements, and certain environmental conditions can impact their performance and lifespan. In cold climates, accumulation and ice formation place physical stress on lighting housings and can block visibility if not cleared properly. Moisture intrusion into fixtures, conduits, or electrical enclosures can corrode metal components, distort wiring insulation, and trigger system faults. Once moisture gets into a circuit, it often leads to repeated failures unless the source is identified and sealed.
Airports near coastlines face an additional challenge with salty, humid air. Salt accelerates corrosion that can damage metal housings, mounting hardware, wiring connectors, and even the interior components of an airport beacon. That’s why it’s best for coastal airports to use corrosion-resistant materials, such as the optional stainless steel cabinet & bearings featured in our rotating airport beacon products, and regularly clean exposed components to remove salt deposits. Applying protective coatings can further mitigate moisture damage.
Mechanical and Structural Problems
Airfield lighting systems must remain firmly secured to provide accurate alignment and consistent visibility. Over time, bolts loosen, mounting brackets corrode, and housings shift due to natural wear or environmental changes. When fixtures are misaligned, their light output becomes less effective, and in some cases, the fixture itself becomes a safety hazard. For instance, if an airport rotating beacon loses alignment or stability, pilots might see inconsistent flashes or reduced visibility of the rotating signal.
Furthermore, airfield lighting sits close to taxiways, aprons, and runways, areas where aircraft and ground vehicles constantly maneuver. Even a small accidental strike from a wingtip, landing gear, or service vehicle can crack a fixture, break a lens, or completely knock a light off its base. Heavy tire pressure, especially from larger aircraft, can cause runway and taxiway lights to loosen or sink deeper into the pavement. Once a fixture is compromised, moisture and debris enter quickly, causing electrical shorts or corrosion that spreads through the system.
Preventive Maintenance and Monitoring
The best way to avoid airfield lighting failures is to prevent them before issues happen. With the proper maintenance program, you can extend the lifespan of every lighting component. A proactive approach reduces downtime, improves safety, and keeps your airfield running smoothly year-round.
Routine Inspections
Routine inspections help you catch problems early. Visual checks reveal corrosion, loose hardware, cracked lenses, poor alignment, moisture intrusion, and cable issues. Scheduled walk-throughs or vehicle-based inspections help maintain a high standard of visibility. Photometric testing is equally important. Even if a light appears to work, it might no longer meet intensity or uniformity standards. Photometric measurements ensure each fixture emits the correct brightness and beam spread so pilots can see their runway and taxiway cues clearly at night or during low visibility.
Proactive Replacement
Waiting for lights to fail can lead to unexpected outages and potential safety risks. A proactive replacement schedule helps you stay ahead of wear and reduces the chances of sudden downtime during critical operations. Traditional incandescent bulbs have predictable lifespans, making scheduled replacements easy to plan. LEDs last much longer, but still degrade over time, especially in high-temperature or high-moisture environments. Replacing LEDs before failure keeps the system reliable and prevents dimming or color shifts that reduce visibility.
Choose Hali-Brite for Reliable, FAA-Compliant Airfield Lighting
Keeping your airfield lighting dependable doesn’t have to be a constant challenge when you have the right equipment and support. With Hali-Brite, you get lighting solutions designed to withstand the electrical, mechanical, and environmental stresses that often lead to lighting failures. Our high-quality, FAA-compliant airfield lighting products are built to perform in harsh weather, reduce maintenance needs, and deliver consistent illumination day and night. Contact us today at (218) 454-0956 or here for inquiries. Let us help you choose the best lighting systems for your airport.