As you are using led and I have very little knowledge on this I will not be much help with the lighting, from what has been said you have 2 exactly the same panels so maybe as said try an experiment with the 2 panels. Also the hand test has always served me well in the past
I would think that the GSC is going to put on some height as she starts to flower, she is a busy lady
All the best and thank you for the picture update
D-M.