what kind of nutes and ferts are you using.. looks like you need some N

if i were you i'd repot those into bigger pots, then cover up SOME, not all, of those huge stems with some soil, then put a stake in the soil and tie them to it, and then drop the lights to within a foot or a foot an a half of the plants

can any pros out there back me up on this???(mobay, zandor, postman,...) cuz im not sure if that will cure the problem but it will help