Feature By Edwin Vice
Proactive Life Safety
Emergency lighting, the infrastructure designed to guide building occupants to safety during a power outage or emergency, is a critical life-safety system that largely goes unnoticed by end users (that is, until the moment it is needed). A 2023 study from Cyalume found that the emergency lighting failure rate is approximately 87%. That means the success rate is only 13%, a rather alarming number for a safety measure in the commercial building industry. For lighting specifiers, contractors, engineers, and property managers, this data point serves as an urgent call to action.
The good news is that modern technology and updated industry standards provide clearer pathways to mitigate common risks such as compatibility and integration issues, installation errors, lack of maintenance, and code-compliance confusion. By understanding the core challenges and adopting future-forward solutions, lighting professionals can drastically enhance the reliability of emergency lighting systems.
The first step to overcoming emergency lighting failures is understanding why they often fail. These are the four primary challenges that consistently lead to system failure:
1. Compatibility and integration issues. Modern LED lighting systems continually clash with emergency power needs. Ensuring emergency drivers or battery packs are compatible with increasingly complex, digitally controlled LEDs is a frequent hurdle. A poorly matched driver may supply the incorrect voltage or power level to the LED array, leading to insufficiency in lighting output or premature component failure under emergency conditions.
2. Complex installation processes. Emergency lighting requires intricate wiring schemes that differ from standard power circuits. This often involves dual circuits, dedicated test switches, and remote indicators. The level of complexity that these installations require increases the margin of error. Miswiring can bypass the emergency circuit entirely, or improperly connected test switches can render the required monthly testing ineffective (or inaccessible). Increased installation complexity directly causes higher initial labor costs and a greater risk of defects.
3. Poor routine maintenance. One of the most common operational challenges comes from a lack of maintenance, given the burden it poses on facility management. Building teams often struggle to keep up with the required testing and documentation. NFPA 101: Life Safety Code calls for a quick, monthly functional test and a more rigorous annual 90-minute full-duration test. Across large campuses, performing these manual tests is labor-intensive, time-consuming, and frequently falls prey to documentation lapses, which can result in non-compliance during inspections.
4. Code-compliance confusion. The landscape of emergency lighting standards is governed by a patchwork of documents, including NFPA 101, NFPA 70: National Electrical Code, International Building Code (IBC), International Fire Code (IFC), and component-level UL standards, notably UL 924. Varying local interpretations and overlapping requirements often create uncertainty about not just what is required but where it is required. This confusion leads to under-specification or systems that meet the bare minimum, leaving more room for performance errors.
Lighting manufacturers are actively making strides to overcome emergency lighting failures through thorough research and solution development that directly address these daily challenges for operations teams; the last decade has seen significant advancements that are fundamentally changing how emergency systems are successfully specified, installed and maintained. For example,
Integrated emergency drivers: The shift toward factory-integrated emergency lighting drivers is one of the most impactful advancements for contractors. Most lights now ship with these components pre-installed by the manufacturer, which significantly reduces field labor and eliminates most of the on-site compatibility guesswork. Overall, this shift ensures a cleaner, more reliable installation from day one.
Smaller form factors: As LED technology has become smaller, so have the required emergency components. The miniaturization of battery packs and electronic circuits has made emergency integration far more feasible in decorative and architectural products. This allows specifiers to meet life-safety requirements without compromising aesthetics and facilitates emergency light integration within high-design environments.
Lithium battery chemistry: The replacement of older NiCd/NiMH packs with advanced lithium battery chemistries (e.g., lithium iron phosphate) signals a major technological leap in the industry. Lithium cells offer several key advantages such as longer life spans, significantly reduced weight (a benefit in architectural fixtures), and a better environmental profile. The improved performance results in a more reliable charge, ensuring units consistently meet the mandatory 90-minute duration test throughout operational life.
Self-testing and reporting: For maintenance teams, the introduction of self-testing-and-reporting units has been revolutionary. Modern emergency lighting drivers now include built-in self-diagnostics that automate the monthly functional test and, in many cases, the annual 90-minute duration test. Many systems also offer wireless reporting capabilities allowing for centralized monitoring and automatic compliance documentation. This collectively reduces the ongoing labor (and common risk) associated with manual testing.
Beyond the specific component improvements, reliable emergency lighting requires optical performance and adherence to evolving code standards. Beyond simple component failure, a common pitfall is non-compliant light output and duration. This often stems from insufficient illumination levels caused by poor optical design or battery degradation that reduces emergency wattage over time. The fixture’s mounting height is also crucial, as installing a luminaire above its tested height can result in code violations due to inadequate light reaching the path of egress. Additionally, batteries failing to sustain the 90-minute duration must be routinely monitored.
To safeguard against these risks, original equipment manufacturers (OEMs) must implement rigorous product testing protocols that adhere to standards like UL 924 or CSA C22.2 No. 141, providing documented evidence that the fixture delivers the proper light output and emergency duration at its intended mounting height.
Industry professionals must also make a proactive effort to stay informed on the latest emergency lighting standards and codes as they’re constantly evolving. Here’s a quick snapshot of some of the most recent code developments:
NFPA 101 and NFPA 70: There is an increasing emphasis on documentation and the use of automated testing features to ensure compliance logs are maintained accurately.
UL 924 updates: Testing has become more rigorous, particularly around the integrity of the emergency function when digital control systems (0—10-V, DALI) are involved, ensuring control override functions correctly during power loss.
IBC and IFC: Clarified language often addresses emergency lighting requirements in egress paths, including accounting for the transfer and startup time of auxiliary power sources, such as generators.
The failure rate necessitates a key industry shift: recognizing emergency lighting systems, not as an auxiliary component but as a critical life-safety system. To improve the current success rate, the industry must commit to three crucial strategies:
Design early for emergency: Ensure that emergency components are integrated into the initial design phase rather than being retrofitted later, which compromises both performance and aesthetics.
Test regularly and automate: Utilize self-testing and centralized, networked systems to replace labor-intensive manual checks, thereby guaranteeing required monthly and annual compliance checks.
Partner for reliability: Collaborate closely with experienced OEMs to verify driver sizing, optical performance, and adherence to all necessary UL, NFPA, and IBC certification requirements.
To move decisively beyond reactive maintenance, success hinges on leveraging integrated technologies, adopting advanced battery chemistries, and embracing automated compliance solutions. By committing to these measures, the lighting industry can build a truly dependable emergency infrastructure, dramatically reducing the failure rate and ensuring that occupants have reliable egress regardless of the event or unfolding situation.
THE AUTHOR
Edwin Vice leads innovation at LightArt as director of Research and Development, overseeing product development and driving the evolution of the company’s portfolio.