I have about 34 hours... which isn't that much lol I am still working on projects for other games so perhaps once I finish those will I be able to put more hours in for Ultra Sun and transfer over a lot of my mons etc.
My playtime in UM is around 450 hours or more. But to be honest, around 70% are only because my 3ds was in Standby. Only 30% were actually playtime.
I'm currently at around 120 hours for Ultra Moon, of which 20 was main game, 5 was RR, 90 was completing the pokédex, and 5 was making a competitive team.