Quelle: IVAO-Forum

There’s a file called „lights.txt“ in X-plane\ressources\bitmaps\world\lites\. Make a copy of this file as a backup. Open it in wordpad or editor (windows) and search for the type of lights you want to change, e.g. VASI3, Change the parameters for alpha (4th columns) and size (5th column), save the file (as pure text) and that’s it.

In my case a made a VASI3 that is full sunlight readable in X-plane 10 on a 3nm final with an alpha of 1 and a size 10.

BILLBOARD_SW VASI 0.8 0.75 1.0 2000 10.0 2 7 1 1.0 0.2 0.3 -998.8 sim/graphics/animation/lights/vasi_papi_tint

Aber Achtung! Nur die Ziffern verändern, keine Leerzeichen oder Tabs verändern, denn die haben alle ihre Bedeutung!

VASI/PAPI-Lichter heller machen