Let me start by saying I understand Bright Nights to be the new default so less players log off at night and the game having more players. This ticket does not aim to change the new default back.
Certain Vanilla servers are aiming to provide their players a more hardcore experience but can't set Nasdara or Sakhal to be as dark as Chernarus on "Dark Nights" configurations.
This ticket is a feature request to allow for community servers to set their lighting configuration so Nasdara and Sakhal will turn much darker as well, giving NVGs and light sources their purpose back. As both snow and desert sand reflect more light than grass it certainly would make sense if you could still see more than on Chernarus and Livonia, but it should be much darker than it is now.
Note this ticket does not ask for Dark Nights to be the default configuration on any map.