I fiddeled a bit more and came up with this: note the doubled up flare and core, as we have dtwin lights on either side. I also adjusted the position.
LIGHT_PARAM airplane_landing_core -0.04 -0.005 0 0 0 -1 0 .6
LIGHT_PARAM airplane_landing_core 0.04 -0.005 0 0 0 -1 0 .6
LIGHT_PARAM airplane_landing_core -0.04 -0.005 0 0 0 -1 1 .6
LIGHT_PARAM airplane_landing_core 0.04 -0.005 0 0 0 -1 1 .6
LIGHT_PARAM airplane_landing_flare -0.04 -0.005 0 0 0 -1 0 3
LIGHT_PARAM airplane_landing_flare 0.04 -0.005 0 0 0 -1 0 3
LIGHT_PARAM airplane_landing_flare -0.04 -0.005 0 0 0 -1 1 3
LIGHT_PARAM airplane_landing_flare 0.04 -0.005 0 0 0 -1 1 3
explanation: LIGHT_PARAM airplane_landing_core -0.04 -0.005 0 0 0 -1 0 .6
-0.04 -0.005 0 coordinates of the light, -0.04 (and 0.04) to separate the lights, -0.005 to slightly adjust the height, I found the lights to be slightly too low.
0 0 -1light vector, in these cases straight ahead. I was too lazy to research the actual angle of the lights...
0 (or 1) 0 means left light triggers it, 1 means right light
.6 is the size (as is 3).
Now you know what you can edit to make the light as you want. Feel free to ask if you have any questions.