Planet Straangee
However, Sophia didn't think about it too much although they were in a dark military base where she couldn't see that much she wasn't that bother since she could still slightly make sense of her surrounding with her perception, as they walked inside they noticed there was no light source, and even when they tried to locate the switch they realized it had been destroyed by the previous inhabitants long ago which made it harder for them to see.
But then that wasn't all, because the more they walked inside the buildings the more they realized not only the light but literally everything seem to have been destroyed a long time ago, it was like a ruin of some sort with only the light of the three moons giving off enough light for them to make sense of their steps, which meant if they got to the part the moonlights couldn't reach it would once again become even harder to see their surroundings properly.