The RELIANCE Runway Threshold Elevated LED Light Fixture, designated as L-862E(L), is a bidirectional elevated lighting solution specifically engineered for runway threshold applications. It emits red and green light and can be optionally equipped with the advanced IQ built-in Individual Lamp Control and Monitoring System (ILCMS), making it an integral component of intelligent airfield lighting systems.
This fixture meets the latest compliance standards, including FAA L-862(L) and L-862E(L) per AC 150/5345-46, FAA Engineering Brief No. 67, ETL certification, ICAO Annex 14 Volume I, EASA CS-ADR-DSN, NATO STANAG 3316, Canada TP 312, and Australia MOS 139. Its use is certified for various critical runway applications: runway edge for runways up to 60 meters wide, runway end, runway threshold, combined runway threshold/end, and runway stopway. Specifically under FAA standards, it covers runway edge (L-862(L)), runway end (L-862E(L)), and runway threshold/end lighting (L-862E(L)).
The RELIANCE Runway Threshold fixture is available in three versions to meet different operational needs: the RELIANCE® IQ model featuring integrated ILCMS for intelligent monitoring and control, a monitored version with integrated fail-open technology, and a non-monitored version without monitoring functionality.
One of the key advantages of this LED fixture is its remarkably low energy consumption—typically 30 watts for bidirectional lights and 25 watts for unidirectional models—significantly reducing power requirements compared to traditional tungsten halogen lights which consume between 120 and 200 watts. The light boasts a high Mean Time Between Failures (MTBF) of 56,000 hours at 6.6A, greatly reducing maintenance demands. It is fully dimmable, following the response curve of traditional halogen lighting, and operates efficiently across the full current range of 2.8A to 6.6A. The fixture’s fast rise time allows seamless integration with incursion protection systems, enhancing runway safety.
Additional features include an optional monitoring function where, if a defect occurs, the LED automatically disconnects from the secondary side of the isolation transformer, resulting in an open circuit condition. This allows external lamp fault detection systems like Constant Current Regulators and ILCMS to identify and signal lamp failures. The RELIANCE IQ version is fully compatible with the RELIANCE Intelligent Lighting 2A system, providing further power savings and remote monitoring capabilities.
Installation is simplified as the fixture fits on the same mounting devices used by most elevated halogen lights, facilitating straightforward replacements and minimizing downtime. Leveling and azimuth aiming are easily performed with a dedicated aiming device, allowing up to 4° of adjustment via three screws. Notably, the upper body of the fixture can be replaced without requiring realignment, streamlining maintenance procedures. The bidirectional runway edge fixtures also feature an omnidirectional beam that provides circular guidance, eliminating the need for additional optical systems.
Designed for durability, the RELIANCE Runway Threshold fixture is low-profile and compact, enabling it to withstand intense jet blast conditions even when installed at runway thresholds or ends. Users can choose between a glass or UV-resistant polycarbonate outer lens, and the LED light source eliminates the need for filter replacements and prevents color shifts across viewing angles or different Constant Current Regulator step settings. The sealed entry at the cord set to the optical assembly prevents insect ingress, and the fixture achieves an IP66 protection rating. The hardware is stainless steel, while the aluminum body is phosphated and coated with baked polyester electrostatic powder in aviation yellow, ensuring corrosion resistance and longevity.
The use of RELIANCE LED fixtures contributes to increased runway availability by minimizing maintenance-related downtime. Light distribution is optimized and homogeneous across the runway, and the saturated, stable colors offer high functional discrimination at all brightness levels and viewing angles. The fixture also incorporates rugged lightning protection that meets ANSI/IEEE C62.41-1991 Location Category C2 standards as specified by FAA Engineering Brief 67. This protection withstands combination waves with peak voltages of 10,000 volts and peak currents of 5,000 amps.
Power supply compatibility is flexible: Non-monitored and monitored versions are designed to work seamlessly with any IEC- or FAA-compliant transformer up to 150 watts, while IQ versions support transformers up to 300 watts. For precise load calculations, users are advised to consult the fixture’s user manual.
Overall, the RELIANCE Runway Threshold Elevated LED Light Fixture provides a reliable, energy-efficient, and maintenance-friendly solution that meets stringent regulatory standards while enhancing runway safety and operational efficiency.
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