Suff's Pineapple Express

So; the little ladies are really starting to get bushy, there's been no real vertical growth yet. As I've taken these on for a buddy, and I'm a total Newbie, I have no real experience to draw from. Everything I'm learning is brand-new; as a grower, and in regards to this, or any new strain. I would have expected some vertical movement by this point, but I can't really draw from anything other than the plants we've flowered thus far. We have 4 weeks in the books for these little ladies & the journey has been fun. From sprouting in Rock-Wool, to transplant, to another transplant & still another transplant to fresh soil, these girls have had a ride. They finally found a stable, happy home in the bottom of the Lab-Tent, only to be moved into the Big Tent & Big Light w/ the New Girls while we dried our last harvest. It's my best guess that they definitely preferred that environment & the big lights, mostly because we can flip the big lights to "Veg. Only". In this last week, the Big Girls got hair-cuts & were flipped to 12/12. We put the dried harvest into jars for curing, so these little ladies found their way back into their spot at the bottom of the lab tent. I also pushed their water-schedule an extra day to sync-up with the big-girl's water-schedule, so they got a little dry by the time they got their big-drink last night. They got the usual 2ml. Nutrient to 2L Water mix, but I definitely gave them a bigger drink. They also got their spritz & by this morning they had definitely perked-up. You can clearly see the yellowing on their leaves. The boy is convinced that this is from the LED Bank we have in place in the bottom of the tent & I don't disagree. I know that the big lights in the big tent each have Veg. / Bloom / or Both; options, while both banks in the Lab-Tent are "On" or "Off", so I imagine they are both a harsher light source. Any input would be appreciated!