Leaf clawing is often a sign of overfert. I believe many people cut the FF with 30%+ Perlite?
But IMHO they look underfed, and not enough soil. Usually yellowing from the bottom up, is a sign of Nitrogen Deficiency. But if they aren't being fed, I'm sure they have an overall deficiency, and will be quickly remedied, if you give them more soil, and food.
Lights need to be closer. They also look dry ????
Always give as much soil possible, and start feeding as soon as you have the 1st serrated leaves, unless you have a hot soil mix. I don't know what you have so I cant be specific, and sometimes 1 thing, can mimmick another. I usually start feeding them 20% solution, as soon as they pop out of the ground. And I feed every watering. But watch, and maybe skip on the 3rd, but usually I don't have to. Just depends on the strain,, and temp can have a big influence. Cooler temp, require LESS fert.
I dont use LED but I believe 18 inches above the top is safe?? Others can chime in that have more experience wIth LED. I have 0, but I do have 40+ years with HID.
Id up pot, and water/feed with a 20% strength fert, and don't soak them until theyre drenched. Just a medium watering, no runoff at this point as the roots aren't big enough, and will stay wet to long If in a 1 gal, or more pot.. More as you get root growth. I like to use a moisture meter, and let them get to Low Moist, and NEVER DRY, and never sopping wet, until they have a huge root system vs pot size.
I myself like to use 32oz cups and stuff them with soil/Promix BX . 32oz gives a good root system for seedlings, and not having to disturb them for a while..