@A. grandis
What bulb combo and order was your favorite on your 6 bulb t5?
I think the one that I like the most due to the growth and colors/pigments is the one with True Actinic bulb:
BACK -------------------
ATI Blue Plus
ATI Blue Plus
ATI Coral Plus
ATI True Actinic
ATI Blue Plus
ATI Coral Plus
FRONT -----------------
Please keep in mind that the order is related to the landscape you have and the blend of the spectrum so it will look homogeneous.
I was thinking of having 2 ATI True Actinic for next year's set, but I like the one I have now so much that I'm afraid to change and loose what I have. It's just amazing how it is...
I've got some Giesemann Aquablue Coral and Actinic Blue bulbs to try out coming on the mail and will see if I have the courage to do it. LOL! But I also got the same set in case I don't like the spectrum of the Giesemann's.
From my experience trough the years the main bulbs that I have to keep for my set is the ATI Blue Plus in the order above. Because I experienced the changes on pigmentation with the ATI True Actinic, it is definitely part of the main combo now. So the "white" bulbs are what I could change, if so. The ATI Coral plus has good values for the corals and brings up the reds/pinks, so that is nice too!!
The Coral Plus is a combination of Blue Plus (~50%), Aquablue Special (~40%) and Purple Plus (~10%). They call it a "15000K+".
Aquablue Special was used a lot a while ago with amazing results, but the Coral Plus came to stay IMHO.
There are other nice "white" bulbs in the market that will do great, I'm sure, but those are the ones I liked the most.
The beauty of T5s is that you can have the combo you want and they will basically work out in most cases. I would keep at least 1 "white" bulb per 6 bulb set. I had 5 Blue Plus bulbs with one Coral Plus before for a year and loved it. It is amazing what we can do with them! The corals, and in my case zoas, can adapt really well and will display different responses to each type of spectrum.
Grandis.