I have this other chamber going with just a couple T5's going... and I'm going to be doing some tricky maneuvering at some point as I popped three of the CaseyJonesXGreenManalishi and also have a diesel reveg in there I want to flower after i get some clones off. They both are going to be staggered against the current batch which is starting flowering now. The CJxGM needs more time to veg for sure, and the diesel could use more time to recover as well. So for now they are in veg while the rest go into flower.
Not sure what's going where yet but I'm going to try to add the last 8-bulb T5 in a separate or adjacent position so as to cover everything I'm gonna juggle. I'm considering a vertical C99 T5-only grow... VSCROG against the vertical fluoro, which would be against a wall due to space and heat limitations.
That might not come out GREAT, but it might work good... and I think it would be a lot of fun to weave the C99's into a net hung vertically instead of a surface scrog. I did fim them so they won't get TOO tall... the 8-bulb T5 gives about 30 inches of light height.
So that would shift 4 plants out of the main chamber and free up space to drop in the CJxGM's and the Diesel.
On the OTHER hand, I have been considering going out and getting a HPS lately instead... if the heat breaks soon enough I might ebay one and get it set up downstairs and see what I can fit under that as a primary and use the closet as veg with just T5's.