Set time and date on Altis to 20h00 July 1 2035 no clouds.
Check lighting.
Change time and date on Altis to 20h00 Dec 1 2035 no clouds.
Check lighting.
Night time lighting on Altis appears brighter in Dec (winter) than it does in July (summer) with same moon phase.
Basically the night time lighting on Altis needs to adjusted to the same levels as that set for Stratis which is perfect imo.