how tall before flowering

First time grower, started with a homemade box with 4 big bud plants inside which out grew the box within 6 weeks. Plants are now in a gl80 tent with 600w digital light and they are loving it. Just wanted your guys opinion on how big i should veg these girls before turning them into big flowering monsters! I am at 17" right now, averging 1/2-3/4 inch a day. Just repotted last night and lowered lights(special thanks to AC for making that possible!) in attempt to gain 1"+ a day. Target height was 24", what do ya think, go bigger, or start flowering soon? Thanks guys

Switch now, I find a 1/3 amount of growth is gained in flower. I'm a w.w. guy, flower growth is strain dependent a bit from my personel experience.

I would flower those, last week, before size constraints, air flow, humidity, show their mean side. These girls look great ! You're Doing It Right !

Alright thanks, I'll give them a day or two to settle down after the re-potting and switch them. I got three exhaust lines going into a can charcoal filter, smell gonna be a prob? don't know how stinky they will get. Anybody wanna take any guesses on yields?