Thanks all. Really though, what had me wondering was the fact the Clorosis was well started earlier in development than the HPS plants are at now.
In other words, I had visible Clorosis in the T5 plants prior to the development stage the HPS plants are at right now....with no sign of any developing Clorosis.
You will have to forgive me....I tend to get hung up on "why's" sometimes. I'm not trying to beat it to death, I just want to understand it.
In my mind, if the HPS plants end up never exhibiting that kind of Clorosis it tends to point towards an effect of the lighting. Since the HPS light (and the 2 CFL sidelights) are in the 5K and above spectrum, it leads me to believe, (at this point anyway) that there is a correlation there.
...or maybe I should just STFU and figure it out. Then I will know.