You Mean I'll Actually Have to Work??

I got a job offer from a firm, and after finding this calculator over at Yayarolly, that shows you how much you have to work according to the billable hour requirements at that firm, I have come to the realization that I'm going to have to work FULL DAYS once I (hopefully) become an attorney!!!! GAH!!!

So here's a question for the lawyers out there - what kind of billable hour requirements do you consider acceptable/great/horrible?