I get here late. I used some of those Led's (lead picture)'they are rated for 21% of the labled output. but it's cool light and will help young plants your problem is that while the plant is thinking up your bringing in sidelights at below 1st leaf.
That causes some strange looking leaves. The plant has a program to grow and I believe in side lighting but not like that. I use them in a spot made for them when they say you can't clone it they will help make it possible.
I found that they work better if you make a v out of them and put above the plant.
Re-Veg
You should be adding some enzymes to eat the dead roots that must be there after reducing it's folage by 99%
I use a foliar spray with Rizotonic early on but the roots are the biggest issue.
If you use cal/mag in your mix regularly then if you don't allow for the N that is a large part of cal/mag you will see N tox in the 2nd or 3rd week of flower and wonder where it came from your leeves are already starting to stretch so it will happen if you don't allow for it.
I have a thing you might use sitting in the grow room when the lights come on, the plants will be drooped a little and should pick up in a small amount of time. They will tell you what they need then, it takes time to learn but you can stop 1/2 your problems then. Mine take 10 to 15 mins to bounce back and 5 min later first water flow. I have found over the years that I uses a lower lvl of nutrients but water 4 times a day I don't water for 2 hrs before lights out.
I have a mother that I keep just cause. She is 4 years old and has been cut 3 times the weed doesn't stay the same as it gets older it is less and less potent. That plant you show has very good upper roots and nice and green you should grow that one out.
The last of old man bs at least once a week wash your catch saucers the water evaporates on them leaving the suspended nutrients on the catch tray in 4 weeks it becomes toxic. Every time you water is redisolved and some is pulled up into the lowest roots.
Your going to start chasing your tale that picture you just posted you have a PH problem and several nutrients are locked out. Most would say your showing a C problem but it's there your plant can't get to it.
Flushing is your worst enemy at this time you will free all the nutrients all at once. Not a good Idea.