Everything you are asking has already been asked a million times around here. Just search it...as for your question...

Sites usually list their yields by per meter squared, usually under a 600-1000 HPS SOG type set up..Which was already mentioned somewhere in this thread.. SOG= many small female clones grown side by side to produce a sea of main colas instead of a few bushy plants...

Yield depends on experience and greenthumb ability...

Words from a rookie that has been in the game a few years already;;; START SMALL AND WORK YOUR WAY UP SLOWWWWLY. Dont worry about yields because it is too many variables.
Forwhat420 Reviewed by Forwhat420 on . Maximum Yields Hello all, I am new here but I have been reading on and off for a couple years. I have not been able to find much info on growing plants that can yield 8oz+. Most growers in stealth cabs have limited space. I have heard talk and LEO reports of plants 6ft tall yielding 1lbs or more. But I have never seen or heard any reliable info backing up those claims. When looking at the ads for seeds from different companies, they often have a yield they give for each strain. For example, this white Rating: 5