I might be a bit off here, but I made rwy/txi lights for FS9 a few yeasrs ago. I made two sets to use - 1. ON at dusk til dawn, 2. On by radio control. The idea was you are coming home from a corporate meeting to your own private airport. On approach you tune your radio to a certain freq, and bingo your lights come on like when you open the frig.. door.
One would place these with IS. I made red white and blue lights. It worked great. Many downloads..... BUT- I could never get them bright enough. You could see them, but you'd always wish they could be a bit brighter.
I've tried to find the answer to this. As I understand, flightsim makes the lights very, very large when seen far away (say- a few miles- on approach). They make the lights smaller and smaller as you get closer. This keeps the brightness the same.
This is only what I have heard. It may be true or not. Anyway- at this date no one has been able to tell me how to make those lights brighter. Many tricks have been tried.... with many effects.... no change.
If anyone has the answer- let us in on it. Bob