As long as you provide decent conditions you should get far more than a pound, sounds like your going to have a good mix of quality herb too. I just picked up 9 green crack clones to add in to my outdoor, although a few of them may go indoors next cycle, first time growing it but I love the smoke..should be fun...take care
I had a bunch of clones get eaten on me one time(dog food) lol. So I only grew 3 plants under each 1000w. I got about 1 and 1/4 lbs per light. I just pinched and bent them a number of times to keep them bushy.
So if you did it right you could get 5-6 lbs off that many plants.