Hey how are you, the change in light distance is a great call! That much light for plants that young is not good. Also, it looks a lot like nute burn. Can only agree with
@Rush2112 here, if you havent fertilized manually yet, its definitely the soil thats too hot. In that case, just continue with plain water, the plants are gonna catch up at some point. Next time just dont use that soil. Also, I would not recommend a flush because that would stress the plants even more! Just let them recover by themselves and add plain water with 6.5 pH and wait. You have to be patient here.
Cheers