There's 2 sides to the room, each under an LED. You are looking at one side, the other side looks identical. You can see 12 plants there, the other 12 are on the adjacent side.
I will not be topping these but in my last 6 LED grows, I did. Gavita LED's are packed with white light and not much red, so nothing stretches much under them. So, I'll defoliate shortly to open up a lot of bud sites lower down and that should be enough to impact growth on the branches. These have been slow growers, and I don't expect them to grow too tall.