A unidirectional 8″ diameter light, the LIRD is used in the touchdown zone for ICAO CAT I, II and III, FAA and military runways. With an LED rated life of over 100,000 hours under field operating conditions, the light output is variable like a traditional halogen lamp, as indicated by the FAA directive. Its drop-forged dome and cast aluminum lower cover make the fitting sturdy, but lightweight too for easy handling in the field.