a mates experience of lowryder#2 on 12/12 was rubbish. i grow with 18/6 and get what i think is good results. most grow with 24/0, you will get much bigger weights. thats the beauty of autos, twice the photosynthisis of standards when flowering. as they dont usually grow over 18 inches i would not recomend using lights bigger than 400watts, its a waste of light depth. you would be better off with 2 250ws than 1 600w. yeilds will vary, from fuck all to a couple of ounces. with each plant taking up less than a square foot with hardley any height, i think they are good yeilders. it would be hard to get 2 ounces per square foot with any non auto