TL;DRAdding a night time only in the gamemode list.
What ?To enjoy the new lights (forever), I wish to suggest an idea. A gamemode that will force you to play in the dark. This is actually a cool idea if you think about it. You can't use solar panels since the star exploded, it's harder to see, so it's more difficult to destroy nests or killing biters/spitters, and it's fun!
Your light is the only source to salvation.