Move the lights down within about 8 to 10 inches if u can, and still cover ur grow bed. One big mistake I made was I misread how to do nutrient strength. I was mixing 1/3 the stength because the chart was "per gallon" and I was doing it for the whole batch. 800 ppm or higher at this point. They look healthy as hell! I agree with the rest of the crowd though on the rest