Defoliate 50% of your leaves off the plant 7 days before light flip. Remove leaves strategically. If a big fan leaf is laying over top a side branch growth top, take the fan leaf off. You won't hurt the plant. If you don't feel confident in doing that, you can keep the leaves but try and bend and tuck them back out of the way. Contrary to some people's insistence that light matters less than foliage (insane) light matter over anything else in terms of bud site production. If it didn't we wouldn't get whispy bottom buds that don't fill out (rolls eyes)
I used to grow 7 foot plants indoors. 7 plants, 7x1000w HPS bulbs hanging between the plants, not above. No reflectors, no hoods. Bare bulb screwed into a mogul that hung from a hook in the ceiling by the wire. We used to pull 2lb per plant. The top colas were fat as a coke can. That was all because of the LIGHT. 7ft includes the 5 gal bucket so maybe 5ft plants in reality?
Back in those days defoliation was absolutely taboo! The consensus was that removing the big "solar panel" leaves diminishes their ability to produce. That's bullshit outdated and debunked science. Look at the youtube channel Mr. Grow It. He has buddies that pull over 4lb out of a 5x5 tent. How the fuck people think they doing that?.......
Anyways, defoliate 50%, if you want, 7 days before light flip. Believe me, you won't believe how fucking bushy they will get again. Then at day 21 of flower, you do your last selective defoliation and tucking of leaves. From there, watch em blow up with bud!
Disclaimer: That advice is for Photo period plants. For Auto's.....i dunno. Auto's are stupid indoors to me so i just don't bother with them.