Sans_fi:
If we are going to get technical... There SHOULDNT be night on Bespin, since the planet is all "clouds" you would only see a dark "sunset" half of the day.

I'm sorry... what?

I don't like to use adjectives of a cerebral nature, but that's absurd.

Are you saying when the sun is positioned at the diametric opposite side of the planet to Cloud City that it won't be nighttime? Whether you mean because Bespin is a gas giant or something else, you're quite mistaken. First of all, gas giants aren't just whispy gas clouds all the way through, and even if they were, they sure aren't translucent beyond a mile or two of cloud thickness.