Never, NEVER, grow at 24/0...........ALL canabis plants NEED "sleep" for a correctly functioning metabolism.
A plant with an incorrectly functioning metabolism will never perform to its fullest potential.
18/6 is ideal and could be considered optimal.
If I were you, I would also decrease the fertilizers slightly, your plants are very, very dark green and bordering on nitrogen toxicity .......and all the problems that gives.