Leaf Problem Should Probably Search but Lazy Stoner

looks like you burned it with the light.. bit maybe not you should get a 2nd opinion

that specific leaf is like 14 inches away from a 400 w hps bulb

i once burned them when they were babies with fluros while i was waiting on my MH n HPS to come in the mail, since then they have made a full recovery but this looked a lil different

it does look like heat stress but idk

is there leaves that are closer to the light? does that part of the plant get alot of air circulation?

ya man it is definately high temps that burnt your leaves...some thing happened to me, and looked the exact same.