Latest grow, super lemon haze, black domina, laughing Buddha and green crack

Here’s a few pics from my newest grow, I haven’t been updating a lot lately so here it goes. The plants are Super Lemon Haze, Green Crack, Black Domina and Laughing Buddha, the black domina is about 3 weeks younger than the others but caught up during veg. I’m still growing with the same setup, 50/50 coco/perlite and a recirculating res, jacks nutes from start to finish, HLG 650R on a light rail, and some extra side lighting as needed. A scrog net 6” above pots sized at 3.5’ x 8’ and additional support net a foot above that. Girls are about 3 weeks into flower in these pics. Anyway, feel free to ask questions, comment, etc.

The last pic is a week and a few days after flipping to 12/12 lighting.

I just got a call and was informed one plant, I think it’s the Super Lemon Haze, is starting to get brown tips on the bigger top fan leaves. I’ve had that happen before and it keeps getting worse, but not enough to effect the yield (I think.) anyone know what might cause that? I’ve tried adjusting the nutes without much difference. I think it’s probably LED lighting and temp but not sure.