Working in the ER, I am forced into an odd sleep schedule. This past year, I have been working a lot of 6pm to 2am shifts. I find that the benefit of the 6pm-2am rather than the traditional 12 hour overnight shift is that I can easily work until 2am without having to waste my afternoon napping. Unfortunately, I am also not very good at sleeping in resulting in a lot of 5 hour nights of sleep. Is this lack of sleep affecting my job performance?