Should i cut off some branches?

So I have 2 plants that are very bushy under a 600w. Just switched to 12/12 today. They're exactly 2ft tall. Should I cut off the small branches so theres only big ones or should I only cut the small branches on the bottom part of the plant? If so how high should i go considering theyre 2ft tall under a 600w. What will give the best yield?

no. make clones!
may be too late but worth a shot.
unleash a clone army during the spring and hope for the best

Google lollipopping or look it up on the forums here but I would lollipop them for sure cheers