Despite the notion of a 9 to 5, realistically I would only be able to sustain a 10 to 4 as my full time job.

I have responsibilities at home and it's draining to assume if have to clock in from 9 to 5. If my hours were to reduce to 10 to 3 or 10 to 4, I'd likely be more happy and productive knowing my working hours are reasonably set.