What Happens with the Lights?

Author's Note: This is a piece for prediction on the book City of Ember.  I am going to be predicting what I think is going to happen with the lights.

For my book club book I am reading The City of Ember by Jeanne DuPrau.  The City of Ember is about a city where the sun does not exist.  The only thing that produces light in this city is light bulbs.  Also the people in this city do not have very many rights.  One right that you do not have is that you do not get to pick your job.  Lina and Doon the main characters in this book just found this out when they were graduating school.  In this city how they determine your jobs is by the mayor coming to your class and one by one students in the class pick out of the mayor's bag.  His bag consists of little slips of paper that tells you what job you get.  After a three year period of time the mayor comes and sees if you are doing your job correctly if so you get to keep your job for another three years.  If not you have to re pick a job from the mayor's bag.  Lina picked pipeworker which she thought was the worst job.  Lina wanted to be a messenger in fact this is the job Doon got.  Doon was so upset he got this job because he thinks that the city needs help, the main reason is because the lights go out to much.  He actually threw a tantrum in front of the mayor.  After class Doon and Lina traded cards.  Now they both like their jobs appose to both not liking their jobs. 

I predict if nothing gets done with the lights very soon then the city will not last much longer.  The reason I think this is because you cannot last very long with absolutely no light.  Also with some of the lights going out and not coming back on for a few hours is not helping this problem.   What if that happens to all of the lights at the same time? People in the city would not be able to do their jobs.  If they needed something they would not be able to see a thing because again sun does not exist in this city.   I think one way they could get more lights would be to send one or two people into the darkness (our world) and explore.  They could find lights and bring them back.  Also they could make this a job for the newly graduated students.