How much will I yield if I flower now?

Ok, so I'm growing three plants that are about 1 and a half feet tall and three other ones that are a bushier strain at 1 foot each. I'm using a 400 watt hps in a 2 and half feet by 5 feet closet with good ventilation. They are six weeks into vegetating and on 16 hours of light. Should I flower now or get them bigger for more yield? Thanks everyone

PIctures wouldhelp a ton, but usually even the early flowering strains are aorund 8-10 weeks if any good. I would say leave them for another 4 weeks to be safe.

Yeah show us some pics - easier to help that way.