The TKH Inset Threshold and Threshold Wingbar Lights, designated as Type THR and THRW respectively, are precision-engineered LED lighting solutions designed to provide clear, reliable visual guidance at runway threshold zones. These lights are critical for marking the beginning of a runway, offering pilots unambiguous signals during takeoff and landing operations. Built to meet stringent international aviation standards, the THR and THRW fixtures combine robust construction with advanced technology to deliver optimal performance and longevity.
Both light types feature a 12-inch outer diameter with a low profile of 6.35 mm above the surface, ensuring smooth integration into the runway pavement without creating obstructions or hazards. The depth below the flange measures 50 mm, allowing for secure mounting in runway infrastructure. The light outlet size of 40 mm by 6 mm provides focused illumination that meets exacting optical requirements. Designed to withstand the harshest environmental conditions, these lights have an IP68 rating, which guarantees protection against dust ingress and long-term water exposure.
The THR and THRW lights boast an exceptional overall lifetime of more than 20 years, with LEDs rated for up to 50,000 hours of useful life. They comply with chromaticity specifications outlined in ICAO Annex 14, Volume 1, and FAA AC 150/5345-46E, ensuring accurate color output that is vital for pilot recognition and safety. Both types operate on a nominal current of 6.6 A with full dimming capabilities ranging from 0 to 100 percent.
Power consumption differs between the two models: the THR consumes 47 watts at nominal current, while the larger THRW wingbar light draws 103 watts. The electrical characteristics include a maximum voltage (Umax) of 7.1 V for the THR and 17.2 V for the THRW, with a minimum voltage (Umin) of 1.7 V at low output (0.1%). Both lights maintain a power factor exceeding 95% at nominal current, maximizing energy efficiency across all operating conditions.
Designed to function reliably across extreme temperature ranges, the lights operate from -55°C (-67°F) up to +85°C (+185°F), making them suitable for diverse climates worldwide. They also include an internal serial interface for diagnostics and parameterization, allowing operators to monitor performance and adjust settings remotely, enhancing maintenance efficiency and operational safety.
Optional features enhance the lights’ functionality and adaptability. A fail/open function is available to detect faults and maintain system integrity, while an optional de-icing kit adds a minimum of 14 watts during operation to prevent ice buildup in cold environments. For improved durability and optical clarity, a sapphire-coated prism can be added to resist abrasion and maintain consistent light output over time.
The THR and THRW lights are compatible with CEDD® technology, a cutting-edge innovation that combines power and data transmission through a single cable using induction. This contactless system enables airfield lights to receive energy and communication signals without direct electrical contacts, allowing for safer and faster installation, replacement, or maintenance. The integrated single-lamp control available with CEDD® further streamlines airfield lighting management, supporting smart, sustainable, and future-ready airport infrastructure.
In conclusion, the TKH Inset Threshold and Threshold Wingbar Lights offer a highly reliable, energy-efficient, and technologically advanced solution for runway threshold marking. Their robust design, compliance with international standards, and smart integration capabilities make them essential components for modern airfield ground lighting systems.
https://www.friarsairfield.com/products/airfield-lighting/inset-lights/tkh-inset-threshold-threshold-wingbar-light-type-thr-thrw
