One of my coworkers is doing this: wake up early at about 6am, work till 4pm = 9 hours with a lunch break and commute.
After he comes back home, he spends time with his gf watching tv but still coding for another 2 hours at least.
This way he can work 220 hours a month not counting his side projects he works on weekends/free time.
He is easily pulling about 250-260 hours a month.
Yes, he's a workaholic.