Out of likes but . They look great! Better to take pics of plants with blurple lights off but they look pretty healthy and good to me! There going to stretch alot now just watch out! Are you going to lay a net down to scrog or trellis atleast?
Short answer is you can flip them whenever you want.
I just ordered a net too put over them
Nice my friend! Will definitely help push them down, control height and even give ya some more potential colas by allowing some of that side growth to grow