I have to disagree, here are my results:
It's very well known fact that DL have different impact depending on WHAT is being lighted. In your case, the surrounding scenery, which doesn't look like a proper P3D V4 scenery.
That's why I showed you a 4K video of GSX vehicles with all their own lights turned on, on a proper P3D scenery.
That's why users are seeing a very different impact of DL (regardless where they come from, airplane, scenery or vehicles) depending on the scenery used.
No, they are not "free", of course, but having the GPU usage at 50% is not something to be happy with: ideally, it should always running around 100%, which means no GPU power is being wasted.
My AA setting is 2x Msaa, turning it off has no effect on GPU usage or FPS. FXAA is OFF.
Since you SHOULD see a noticeable difference between MSAA and FSAA, if you don't, it's likely because the performance loss caused by the lights lighting a non optimized scenery, is larger than the one caused by the different anti-aliasing setting.
I'm not trying to debate the FPS loss on Dynamic Lights, i'm just asking where are located the trucks models on prepar3d v4 so i can replace it with the models from prepar3d v3 or fsx. Or if there is a way to disable all dynamic lights from gsx trucks without having to turn this option off in the simulator.
You can disable dynamic lights on the vehicles by removing the fx_headlight.fx and fx_headlight_small.fx files in the Addon Manager\Effects folder.
In any case, your message was useful to suggest what we'll feature in the next update: all vehicles will turn on/off their headlights automatically depending if they are moving, which should reduce the number of DL that are active at any given time quite a bit.