Brown Spots on Sugar Leaves

Hello friends, new grower here. This is my first grow and I’m growing a gorilla glue and a Pineapple Express. Both are autos. I am just now going into week 8 and I’m seeing brown spots on some sugar leaves on the Gorilla Glue. I have already cut back on the nutes. I was getting some tip burn. The Pineapple Express is showing no signs of anything. Until yesterday I had my light all the way on top which was about two and a half feet away from the plants. I lowered them after getting a light meter. I’m wondering if this is something I can fix or if I even need to worry about it.

Looks like phosphorus to me.

If they are ILGM GG4 Autos watch your water too. They seem to really like the soil dry.