Autoflower on Hydro. How fast will it be

17-07-2021: Growing pretty fast. Went away for a week and now they are more then twice the size :). Put lights on 18 hour schedule and added a Bruce Banger from Seedsman to germinate. It is there to be a mother for my next round. Because of the height difference I have added a 60W Blurple Led above it. The Auto's are flowering nice but stretching a bit now, I think because there os not so much space.