do you have any more vertical room to move the lights higher if needed? I haven't used LED's before so i dunno what the minimum distance required is, but if this causing a problem, then LSTing your plants will reduce their size and give you multiple tops (imo much better than topping them)
Cant find that stuff gf24, maybe I will have to order it online. What I wound up doing here was taking out my shelves and moving the plants to a plastic coated rack so the smartpots are off the ground. Will post pics.