Nitro Def, Light Burn, Cal-Mag def? I'm Stumped.

[Jcrest23526]

This is my 1st grow. Growing Sweet Tooth Auto from GYO seeds. On day 32. Plant is only about 6" tall with 8 nodes.

18-6 Light cycle.

Growing in a 3 foot by 4 foot grow tent.

900 watt Philzon Veg/Bloom light. Hangs at 36" from canopy.

Temps are 82 F. Humid stays around 45-50%.

PH: 6.8 with run off at 6.3.

Fox Farm Soil - Nutes.

PPM: Flushed a few days ago to bring down from 1,800 to 945.

Im thinking maybe i have to powerful of a light for that space and only growing one plant? I have a extra 400w light i could switch with if its to much light.

 

[JS550Fan]

What the EC of your nutrient solution?

 

[Simplicio]

This is my 1st grow. Growing Sweet Tooth Auto from GYO seeds. On day 32. Plant is only about 6" tall with 8 nodes.
18-6 Light cycle.
Growing in a 3 foot by 4 foot grow tent.
900 watt Philzon Veg/Bloom light. Hangs at 36" from canopy.
Temps are 82 F. Humid stays around 45-50%.
PH: 6.8 with run off at 6.3.
Fox Farm Soil - Nutes.
PPM: Flushed a few days ago to bring down from 1,800 to 945.
Im thinking maybe i have to powerful of a light for that space and only growing one plant? I have a extra 400w light i could switch with if its to much light.

The light is only 220 watts, and we don't know the efficiency of its LEDs. If anything, it's too little light.
It can probably be moved closer, slowly.
Temp is a bit hot, and humidity is much too low for that temp. Google Vapor Pressure Deficit chart, and get a top fill ultrasonic humidifier.

In hydro, 1800 ppm would kill my plants.

 

[Kush420]

Looks like nutrient got splashed on the leaves? Also pH is too high (leaf looked twisted in first pic) you want that back around pH 6.5 / pH 6.6.

PPM also too high at 1800ppm for the size of the plant you are going to burn it before it gets bigger! I'd back off the nutrients and get that PPM back to around 700 and see how she goes. The high ppm and low humidity for the plant is not good. This lady isn't even flowering yet but your environment is set wrong for this stage of growth.