my new set up what should i hope for?

A friend and myself have purchased a 2m sq tent, 2 600w HID 2 600 HPS and a 5" extractor kit, The plan was to have HID lights on for the veg phase and the HPS for the flowering, We have got SUPER ICED grapefruit and bubblicious as we both have had good experience in soil with these strains for flavour and yield. The question I have is what would be the perfect amount of plants in that sized area and a rough guess at yield per plant? We both have roughly 6 years experience between us but not on this scale we were more of an individual plant kind of people. Thanks

No clue on yield without temps humidity ph nutes etc... Many factors to yield.

I understand that its in soil, and on a 400w scale with 4 plants I managed just under and around the 4 Oz mark