Auto stains and yeilds

Hi im using a 400watt hps with compost and im gona use bio bloom in flower ,im only growing 5 plants auto ak47 and thinking about growing (big devil) i like the auto strains but not too sure on yeild what can i expect with light im using and also could you give me any advice to maximise the yeild in auto strains only thanks for your time post post away..

I'm a long time auto grower who is very satisfied with my yeilds. At about 3 wks old, I move my plants from T5 to 550w hps in a tent. Just harvested a lowryder 2, got 102g wet/ 37gdry.....I use Humboldt soils and biobizz nutes. I'm currently growing several auto strains.....sweet seeds speed devil 2 & fast bud, green0matic (GHS), lowryder 2 (fav), auto assassin, pakistani ryder......all are hearty and are going to exceed their stated yeilds. Good luck....Give me a shout if ya need any help.....

I just grew 2 easy ryders under a 250 hps. Got 120 grams all together and i could of put more under the light.

also the one i lst'd didnt yield as much as the one i left alone :S

i could of done it wrong it was my first grow so