Man- if your light is as high as it can go (or close to it) - set some stakes in those pots and start bending those tops over before it's too late!
And. No, pruning lower limbs won't change stretch. But. Pruning lower limbs WILL have a positive impact on your finish, as long as all else goes well

. At first, I was like...no- there are buds on this branches and I can't cut them off!
Then I cut, trimmed, cured...and realized how little there actually was down there.
And now? I don't go crazy. But lower branches don't stick around.
Looks like you have enough plants to "risk" an experiment

Keep us posted!