2nd Grow HELP autoflower seeds which are the biggest yeilders???????

Hi all, I am looking at geting my 2nd lot of seeds but dont know which to go for, I want the biggest yeild as possible from 4-5 planted. My set up is a 1.2 x 1.2 x 2 meter budda box tent with a 125w red/blue cfl to start with then 600w. who's got the biggest and from what?