Nutrient intake, Available and transportation are all very much tied into the amount of light there is.. Light=Output. Balanced nutrients is a big part of output.. Aim for balance like obviously don't use 1:1:1: of the trio. but use like 1:0.25:0.25 for veg and 0.5:15.:1.5 for flower.. Some relationship like that. I see a lot more problems from guys overfeeding then underfeeding.. Your on the right track I believe.