Just finished my 12 hrs per day shift. 2 days, 2 different time frames.
The first night shift was not that bad. Just that by the 3rd quarter of it, my eyes were closing by itself subconsciously.
Well, it takes time to condition. Hopefully, it will be different in the next few weeks of work.
I must say things are getting pretty interesting lately as I have been treated to loads of eye opening stuff. Oh well, still got loads of stuff to see and learn in the next year or so.