Why the Tip of My Leaves turn Brown? It's Not the Whole Leaf Just the Very Tip

i was just wondering why the tips od some of my leaves turn brown and then eventually chips off its not on all my leaves just a few of them...im not sure if its the light burning them because i do spray some water on my leaves sometime to cool them them down kind of like foilar feeding them but no nutes....so can it be that....it cant be the FF GROW BIG. because if it was all the leaves will be turning brown..i think right? sorry no pics

Surely if it was spraying them that is causing burning then it would be over any part of the leaf, not just the tips?

It's over-fertilization. Nutes no matter what kind will turn your tips brown/rust colored if you over-feed you plant.

If its just the tips of the leaves then your lights are too close. Over fert usually involves browing of edges.

*BUDS said:

If its just the tips of the leaves then your lights are too close. Over fert usually involves browing of edges.

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Not always. Light can burn plants too but it looks different than nute burn.
This is light burn;

Only the tips of yours are burned because it's either early signs and your just barely over-feeding them. You should only have to adjust your ferts slightly.

Doesnt chlorine in water burn the tips? Are you using tap water?