The PRO APF 8" ICAO RCLI/TDZI light acts as a runway centerline and touchdown zone light. The RCLI is a bidirectional light, typically white/white or white/red. The TDZI is a white unidirectional light. RCLI/TDZI may be used for any category ICAO, or military runway.
The PRO APF 8" ICAO REXI is installed on the runway and is used to indicate the distance to go to the nearest rapid exit taxiway. This is typically six yellow lights adjacent to the runway centerline, configured as a three - two - one sequence spaced 100 meters apart.
The Pro APF LED Series features the most efficient runway centerline application with total power consumption of only 16VA for a CAT III white/white fixture.