I believe a lot of numbers are pretty exaggerated... I'm not saying it can't be done but the longer I've been on this site, I see people weighing stalks and wet - calling it good.you can get that very easy if you know how to grow, i have one 600 over 2 plants, 3 months i got a pound, every 2 months with the veg room also. You could put one 600 over one plant and get a pound in 12-16 weeks depending on strain, if you wanna see an awesome plant, check out ''ne1cangrow'' on youtube, hand fed hydro in a cupboard, over a pound, one plant 600 watts 3 1/2 months from seed!!!!!