The PRO III 12″ RCLI/TDZI light is a multi-use fixture for use as a runway centerline, touchdown zone and rapid exit taxiway light. The RCLI is a unidirectional and bidirectional light; typically clear/clear or clear/red, with two 48W lamps. When used as a rapid exit taxiway light it uses one 48W lamp in a green/blank configuration. The TDZI is a clear unidirectional light, with one 48W lamp. The RCLI/TDZI may be used on any category ICAO or military runway. The REXI is a yellow unidirectional light primarily used as ground traffi c aid on taxiways to alleviate traffic.