My guess Magnesium Deficiency? Can you tell what it is?

Plants started like bronzing from the inside of leaf closest to the vein making its way out to wards the tips. I thought they might be hungry so i fed them 1/4 strength maxigro and when I came back this morning the bronzing had intensified a bit. Im guessing Magnesium but then again.. what do I know.? lol
Id really appreciate the help!!

how far from lights?

lights too close

Thanks for the reply! I got a 1000 watt reflector about 20 inches from the plants
But are you guys sure cause i also got another plant directly next to it the same size and lights and it does not have any of the same symptoms.
@Uberknot @trippytrappy

a 1000w , 20 inches fuck me , i use 600`s and they bout 2 ft away , 28inches to be exact anyhow , ive never used 1000watters so carnt comment really but that seems way to close

Mg deficiency will start in older leafs. Is your light being cooled in any way?

@trippytrappy now that you mention it I could raise it up a few inches i guess it cant hurt. Thanks

@dtl420 These arent the oldest leaves being affected but they are for sure not like the newest growth and i do have a fan sucking heat out of it but the thing is the tempered glass fell out and i havent replaced it yet.

i would take it up another foot, any1 correct me if im wrong but 3ft sounds about right depending on conditions and fan circulation

hahaha dont thank me , hit the fucking (like ) button , hahaha