Opinions on best yield...

Hey everyone,

I was just looking for some opinions/suggestions for the best yield. I germinated 8 (all I had) Master Kush feminized seeds. Now I was only thinking of having 3-4 plants total, but all 8 sprouted and all are growing well.

Few details:
Second grow
4'x4'x8'T room (only using 2'x3' in pic).
600w MH/HPS (I have 4 true 65watt cfls for corner fill if needed).
Plants will be 4 weeks old this weekend.
Between 6-9" tall.

Main question:
Should I flower all 8 plants early in maybe 1-2 more weeks (6 weeks total)? Or should I dispose of the weaker and veg maybe 4-5 plants longer? My main concern is getting the best yield and not running out of room and proper light.

Any suggestions for the best yield is appreciated...Thanks

i would keep them all and FIM them to make them really bushy u wanna go out not up

Pretty much what he said, fim and top them for another 3-5 weeks, don't eliminate any yet. Master kush is a very heavy yielder.