discoloration in two of my plants any thoughts?

(3) Super Lemon Haze Feminized from Green House Seeds
Sprouted September 12th

I have about 55,000 lumens at 6500k and 2700k. half of the lights are 3feet away and the other half are 4-8inches away. Also there is a 75 watt LED light 3 feet up.

Apollo 600 Watt HPS + MH is on the way!

The 1st & 2nd pic looks like the edges of the leaves are curling up. Might be excessive heat. What is the temp? Third pic plant looks good. Yellowing might be under/over watering. They actually don't look that bad!

Feeding/nute schedule? Perlite in your soil? Temps/humidity readings? pH of your water/run off?

I had similar issue and it was the PH in my case.