The SP-401 Solar Runway Threshold Light is a high-performance, solar-powered, medium-intensity lighting solution designed for both civil and military airfields. Ideal for permanent installation, it also serves as a reliable backup for airports equipped with traditional wired lighting systems. This advanced threshold light delivers a unidirectional green light output of 450 candelas, tested and validated by an accredited laboratory, and complies with international aviation safety standards including ICAO, FAA, EASA, CASA, and several national aviation authorities across the globe. Engineered for long-term use, the SP-401 offers remote radio control, real-time monitoring capabilities, and user-replaceable components that ensure operational flexibility and reduced maintenance overhead.
Built to endure harsh environments and mission-critical applications, the SP-401 is constructed around energy-efficient LED optics with a lifespan of 100,000 hours and maximum power consumption of just 2.4 watts. The light can be configured with optional infrared LEDs for NVG compatibility, expanding its functionality for tactical and low-visibility operations. Powered by dual batteries housed within a robust enclosure, the SP-401 offers flexible energy options including Lead Acid, Lithium-ion, LiFePO4, and Arctic-rated Cyclon batteries. These battery configurations deliver autonomy ranging from 240 to 816 hours at 30% intensity and are designed to last between 1,200 and 3,000 cycles depending on battery type, with capacities up to 408 Wh. All batteries are user-replaceable and compliant with air transport regulations, ensuring global serviceability.
A separate 25-watt solar panel with polycrystalline (or optional monocrystalline) technology serves as the primary power source. Engineered with a lifespan of up to 15 years, the solar panel includes MPPT temperature compensation and an integrated inverter capable of handling 12–36 V at 2 A. Wireless mesh communication supports frequencies of 868 MHz, with optional configurations for 915 MHz or 2.4 GHz, and provides an effective range of over 10 kilometers using relays. Multiple activation methods are supported, including through the UR-101 handheld controller, UR-201 control and monitoring unit, or directly via an Airfield Lighting Control and Monitoring System (ALCMS). The SP-401 supports steady, flashing, dusk-to-dawn, visible, infrared, and combined visible + infrared operating modes for complete operational flexibility.
The SP-401 prioritizes reliability and safety with five levels of system protection, a secondary power supply as backup, real-time status updates via ALCMS, and a physical emergency ON/OFF button. Designed for extreme conditions, it functions within temperature ranges of -20 to 50 ºC by default, with an extended option of -40 to 80 ºC. The enclosure meets IP-68 standards for water and dust ingress and is IK-10 certified for impact resistance. Additionally, it withstands jet blasts of up to 240 kph, making it ideal for use in high-traffic airfields.
Certified for international compliance, the SP-401 meets stringent photometric and chromaticity standards outlined in ICAO Annex 14 Volume I and is certified by STAC and other global aviation bodies. It also adheres to frangibility requirements and includes CE declarations of conformity to RED and RoHS directives. The fixture’s modular design includes a wide array of precision-engineered parts such as a glass dome with an O-ring seal, LED optics and PCBs, radio antenna, pressure-stabilizing valve, charging port, solar panel mounting frame, and frangible coupling. This combination of high-end components ensures ease of maintenance, rapid deployment, and dependable performance in all operational environments.
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