Looking at shoot to root ratio, I'm thinking you're probabley pretty rootbound.

You don't say what the medium or feed schedule are, so I can't give much advice there.

It does look to me as though there's an osmotic pressure issue,though.

Maintaining a tight node structure w/ CFLs requires some serious management. Don't know what the lighting array is, so I cant help ya there.

I think that you may have trouble finishing this plant out w/o repotting and radically upping the lumens.

But w/ a little more info, we can do more.