The IRTEL is a medium intensity bidirectional light (using one 48 W lamp for the green side and one 105 watt lamp for the red side). This fixture is used on runways where the threshold and end lighting are co-located and where it is impractical to use an elevated light.
| Compliances | FAA AC 150/5345-46: L-850D |
| Fixture Type | 850D6 |
| Colors* | RG = Red/Green; GR = Green/Red; GX = Green/Blank; XG = Blank/Green; RR = Red/Red; *Refer to the color symbol position: the red beam is always straight. RG means right toe-in of the green beam. GR means left toe-in of the green beam. GX means right toe-in of the green beam. XG means left toe-in of the green beam. |
| L-823 Plug Connection | P1 = One plug; P2 = Two plugs (Two color units only. Blank is not considered a color.) |