I expect this post will be moved to the modding Discussion and Requests area soon enough.
Mmmm, limited daylight.
Well, if you go to the serverconfig.xml file in your main 7 Days to Die folder you can configure the
<property name="DayLightLength" value="18" />
value to reflect the hours of daylight you would like each day. Changing it to 2 will give you that 2 hours of daylight.
In addition, you can also add a mod such as Night Fog which will allow fog to roll in at night.
https://7daystodiemods.com/night-fog/
Good luck with this environment and any solar panels players set up. ^^