I had to cut some main colas as they were reaching over 5' tall! I don't want to risk hermaphrodites caused by the stress of the colas growing into the light so I made the call to just cut them shorter. It will affect yield but there are so many flower sites I doubt I will notice!
Next week I might try to shock them with some cold to see if I can get them to start turning a bit purple. I might hold off two weeks to do that I am not sure yet!