Light or ???

100% light stress.. Back those lights off and give them a few days or you will get deficincies . They will begin to take up more water, hence food and maybe cause a lock out.

Slight burn, but not tooo bad! She’s looking pretty frosty!

4 plants are to much nutrients. I would lower the dose and cut out the nitrogen . The last picture up her feeding.

hello the plants with the dark green color are overfertilizing or you have a soil pH higher than 7 and cannot absorb the nitrients I would tell you to measure the soil pH if it is within the optimal parameters you have simply fed them too much

advanced natural bloom 1/4

I have a same condition, in my situation I think my plant is over fed, i am serving water only this week and not getting any worse.

what nutrient are you using? it looks like a copper deficiency, but it is very difficult to have a deficiency of this nutrient.

Or is it a nutrient deficiency?