Check out the coloured lights addon, if you havent seen it before.
http://ofp.gamezone.cz/unofaddons/ColoredLights.zipExperiment by adjusting the colour, size and brightness.
It simulates lights using the fire method, as a result your lights will 'flicker'.
Gives it that heat wave haze look at a distance.
Use "this inflame true" in the init.
If you adjust the coloured lights cpp so the model it uses is your runway light model, the light effect should come from your light model.
I tested this with the headlight model from gunslingers editor addon a while ago.
I like your light model, hope you get it working.