Which one of us is able to decide about dark and light?
Nighttime for us means daytime for many species on Earth. So that their nighttime, which we call daytime, is suitable for us.
I got this photo shot of La Gomera island at nighttime but if have a look at it and imagine how the canary islands could look many many years ago you can see how they migh have looked at daytime, just as we see them nighttime. The lights of our cities are much more flames from lava and the clouds are likely to be fumes of the eruption.
Do you have time to get relaxed? Go to the beach and have a look at the nearest town to you – our earth looked something similar not so long ago. Some of the differences were that these lights were not made of people but the nature itself.