That works, thxs.
However, due to the bad graphic constructure o X-plane 11 - who makes very bad fps on great graphic card, I need to run lover than HDR, to at least get up to 20 fps. Before the lightning was shown on lover level on "visual effect settings, i.e. as it does of the daylight..
MY SPECIAL COMMENT ON THIS PROBLEM
It seams a bit stupid to have EnV GTX 1080 and a i7 4.6 Ghz + 32 Gb ram and get so awful low fps. The overlay from geforce - showing FPS on the "card" - gives 110 fps when X-plane only deliver 20-22 fps, so the graphic standard is bad, or out of the times of today's graphic standard for 3D programming. I think it's maybe some bad emulating problem between X-plane and GeForce standard...?
If I over-clock the card GPU (who is running 1 000Ghz as standard) I will only get around 2 fps extra, and that also shows that 70-80% of the FPS-"power" is "killed" by X-plane.