3rd Grow - Light burn or Nute burn? w/Pics

I am at day 2 of my 6th week of flowering. The plants seem healthy for the most part, I use all Fox Farm nutes at half strength and I have a very light soil. 2 parts Ocean Forest 1 part Light Warrior with probably a little bit more perlite than I needed so the water runs right through the soil. I have a 1000 watt on a 4 1/2 foot light mover that from the highest plant top is probably about 8" from the light. The plants are all on bricks so the height can be adjusted easily, but my question is, are they burning from the light, or the nutes? The temps in the room range from 75-83 degrees and there is good circulation and airflow particularly over the top of the plants.

i got the same problem

the yellowing is natrual this late into flower. the plant is draining the nutrients from the leaves and helping the buds grow. you have nothing to worry about. nice plants