Yo man plants look good, one thing about yoursoil.. doesnt look like there is any perlite in there. Have you had any issues with your soil not draining?
those lower colas wont get big with the 400 hps so far from them, maybe a few cfls close 2 those low colas, ill say 1 1/2 ounces the way it is, 2 1/2 if those lower 3 get more light