I would ask someone else. I know nothing about hydroponics or growing inside, or auto's. I just know when it's close. I can't tell without getting a good look with a scope.So i can be certain. There's members here who can be more decisive. I'm only judging by the quantities of trichomes but even that can vary by strain.
I would say a couple weeks or more. Looks real good. with some more time it will fatten and get extra frosty.