Oops, forgot to say, take some of the stress of the plant by moving the light away. It only takes a few days', or two feedings or so to start seeing them greening up! On my 1000's that I run in Air cooled shades, in middle row always show's signs of low N than the rest~ I up the lights a bit, and they turn greener. Just got to make sure that when you feed you do so with a safe PPM, with a little bit of dampness to your soilless or soil. Dont want to feed a plant nutrients when the plant is drying out or the medium. Your plant will take in more water than feed. Usually thats that way always. Anyways, trying to keep it short. Best luck!!!