Making nights darker?

[nemokin]

Hello

I have been enjoying FlyInside for P3Dv4 using PMDG NGX and 777.

I have 2 questions, hopefully someone here can help please.

1. Nights are quite not dark enough. Sky still has dark blue-ish color.
I would like to make the night sky much more black, even the ground a bit darker.
How do I adjust the settings possibly?

2. Landing lights and taxi lights do not light up the ground when on the taxi way or the runway.
Is this something native to FlyInside or is there a setting I can adjust?
(Yes, they are turned on in the sim)