The PRO APF 12" ICAO STPI fixtures are used for runway incursion protection and traffic control on taxiways just before active runways. They are required for SMGCS operations. This unidirectional LED light is designed for use in all weather conditions.
The PRO APF 12" ICAO IHPI is an intermediate holding position light used to mark a holding position that has been established to protect a priority route. The IHPI is a unidirectional yellow light with 12W power consumption.