Leaf problems with pics

I noticed this a day ago - I thought the browns spots due to light (400w MH) too close - 2 plants in different areas have this
The other plant has very light green edges to leaves - not all -just a few

ideas?

i see light burn AND early mag deficiency.

given the soil I'm using (Foxfarm OF and HF) and Grow big and Big bloom nutes, and no other plant shows it I'm having a hard time seeing Mag Def.

looks like early nute burn to me.

try flushing your plants well. use 3x the amount of water to flush them that your pot would hold (I.E. if your pots are 5 gallon, flush with 15 gallons of water), given then a few days to start drying back out and water them with a good fertilizer. this will generally take care of most problems.

in 30+ years, ive never had a plant grown in soil that had problems with mag,potassium, zinc,ect deficiencies.

understood - I'll try the flush