"First thing comes to mind"
?light or nute.
I would check the ph @Brandini
use the hand test to determine good distance. If the light is hot on your hand at canopy level too close. Not warm = too far away.
This was taken from @Eagles009 post on light distance
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They are led so like almost no heat at all
I have the up 2’.5 - 3’ have been
Hand test gonna be for those mh / hps bulbs. With leds you can have light stress without heat stress. If you can show me where I said that about leds I’ll delete it.
I did say you said that about anything, I was just reiterating that they were “led” wasn’t sure if I had mad that clear
@Eagles009
I’m sorry Eagles, I was just using that for a general reference of using the hand method to test for heat. Sorry again if I stepped on your toes
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No worries friend I was 
maybe it was an old post and I’d delete it. Don’t want to see anybody with light burn because something I said.
I’m thinking both plus i might see some wind burn as well
Im growing these 2 under 2000w led which is 450 true watts at 40 inches because of previous bleaching @ 36 inches so i moved the light to 40 inches there is no streaching nore is there light green in the center to indicate not enough light this is day 12 from seed in a hydroponic system in a completely sealed co2 (xl exhale co2 bag) grow room at 1000 ppm at top of tent with a ph of 5.8 and the Electrical Conductivity is at 1.0 so my question is is this the veg state needing to know when should i move light closer