One of the quest windows. This one is the quest tree for light sources due to how limited they are.
Two of the stars of the modpack in one picture.
Dimensional Doors can give good loot, but they can also be terrifying.
Portals to the Midnight dimension will spawn in the Overworld at night.
The Nether is a very dark place, but there are plenty of light sources to be found.
Even a torch doesn't provide much light.
An example of how dark places can get in this modpack.