light green color?

My plants seem healthy otherwise, but they seem to be light in color. I am useing GH three part...Diamond nector and Cornucopia Plus Dr thomas' Necessary Plant Energy (Tricarboxylic Acids) for pH stabilizing) What could I be missing..Also using 1000 watt hortilux hps for veg could that be it? or should I be adding mag.? Epson salts?

Pictures are worth 1000 words :)

it could just be light green new growth.. could be a nutrient deff. or even lockout..

hard to say without seeing her :)

GL.