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[D.A.A.S.69]

Brown spots sounds like you need cal-mag, have you been using any ? Are you using tapwater?
Next time try to get pictures of the brown spots.

 

[Dxg598]

I use cal mag on every feed im using filtered water and picture is in my first post i will put another one clearer

 

[Dxg598]

Can it be a nute lockout?

 

[D.A.A.S.69]

Are you checking your run-off?
Lights to low can cause all sorts of problems, spots included.
Next picture can you take it in natural light ? Can't see good with your Led on.

 

[Chefbjy]

With cannabis plants that have light burn, your leaves can sometimes become yellow or red/purple, possibly with brown spotting, often with burnt tips/edges and margins that stay green. Other problems, like nutrient problems, can trigger or make the symptoms of light burn a lot worse. Leaves may also appear generally burnt in places when there’s too much light, especially when combined with heat or nutrient problems.