The PRO III 12/8" L-850A,B RCL/TDZ is a robust and versatile in-pavement airfield lighting fixture designed to function as either a runway centerline light (RCL) or a touchdown zone light (TDZ). Available with or without a support ring, this 8-inch fixture meets the demanding requirements of FAA and military runway operations and is suitable for use in any runway category. It is engineered for high performance, easy maintenance, and long-term durability in harsh airfield environments.
As a runway centerline light (L-850A), the PRO III is a bidirectional fixture typically configured with clear/clear or clear/red optics and powered by two 48-watt quartz halogen lamps. This bidirectional functionality ensures reliable centerline visibility for aircraft arriving and departing from either direction. When configured as a touchdown zone light (L-850B), the unit becomes a unidirectional fixture emitting clear light from a single 48-watt lamp, providing precise visual guidance during aircraft landing phases. Both configurations are fully compliant with FAA specifications and are suitable for use on both civilian and military runways.
This light fixture is ETL certified and meets or exceeds all requirements set forth in FAA AC 150/5345-46 (current edition) for L-850A and L-850B classifications. It is also compliant with USN NAVAIR 51-50AAA-2 and UFC 3-535-01 standards, ensuring compatibility with U.S. military airfield systems. The housing exceeds the structural strength requirements specified by the FAA, delivering exceptional durability and resistance to heavy aircraft loads and environmental stressors.
The PRO III 12/8" RCL/TDZ features a low-profile design, extending less than 0.25 inches (6 mm) above the pavement surface, qualifying it as FAA Style 3. Its high-strength aluminum optical assembly provides excellent resistance to corrosion and impact. Beam orientation can be easily adjusted to toe-in left or right, offering flexibility during installation or reconfiguration. The fixture is designed for straightforward maintenance with a minimal number of stock parts and no need for sealant when replacing prisms or feed-through assemblies. Additional features include a pressure test plug to verify seal integrity and an external ground screw for reliable grounding. The quartz halogen lamp offers long service life and energy-efficient performance, making the PRO III 12/8" L-850A,B an ideal solution for demanding runway lighting applications where precision, reliability, and compliance are critical.
https://www.eaton.com/us/en-us/catalog/airfield-lighting/pro-iii-12-8-l-850a-b-rcl-tdz-runway-centerline-touchdown-zone-light.html
