Best strain plant to grow for biggest yield small grow tent size 2 plants

as title im going to grow 2 plants in a small grow tent one that you can buy for 150 dont know what its called looks about meter and a half square 8 foot in height aprox i have a 600 watt hps duel spectrum have done alot of big grow but now wanting to get the most out of just two plants need them medium in height any suggestions of what produces alot reliably? white widow seems good strain will be using biggest pots i can coco mix and feeding them flora going to start from seed so planting 5 to start and the best two will be kept all comments welcome advice please

I get similar yields from all my strains...so I think it is less the strain, and more the grow...

if thats the case then what one of the white strains is popular just now as im old skool skunk ect may do skunk 11 as had some very big yeilds b4 with this strain and also wich seed company should or do you suggest i use

I reckon you can pull off a big yield if you just do a single plant grow.