I’ve watched movie City of Ember and found it pretty watchable. What I’m going to write here is not what is there in the movie but what will happen the hypothetical world of movie after it finishes.
Can you just imagine that some people, who are living without natural light since past 200 years (no, not the same people but the period is ofcourse divided between many generations), can react cheerfully for the sunlight that they are suddenly exposed to!!! How do they cope with the totally new phenomena of Sun in their upcoming lives?