Those look dam healthy @@

What ever you are doing keep it up! With the amount of light you have I read you might want to be really careful about overwatering since not quite as much evaporation. Now I let my plants get bone dry, but right before a wilt - then I bottom water 1 quart of water per gallon of soil. ( 6 under 2000 watts )

But very nice color, I am jelous!!! I have always ran a bit yellow due to a PH problem from what I can understand so far.

Ps, Make sure you get a red spectrum for budding, I hear good things about T5 grow lights / fixtures and "HPS" is what I use