look hungry to me, but need more info, how old, what strain, what grow medium, what kind of nuts do you use and how much Etc. etc.
about T5HO tubes, I use em in Veg, need to be 2-4 inch`s away from the top of the plants to provide good light, after 6-8" I don't get much reading on my light meter and after 12" I don't get any ..