Actinic+ or Pure Actinic

Sounds like a nice fixture. I think you're going in the right direction with it... I believe that the MH bulbs will provide all the spectrum you need for growth, while the more actinic bulbs you have, the more they will fluoresce.

Since you're running your MH for such a short photo period, you may even want to consider running a single bulb of something like an ATI Aquablue Special, just to extend the "daylight" viewing time of the display...

this is what I would try, if it were me:

UVL Super Actinic
ATI Aquablue Special
MH MH
ATI Actinic +
UVL Super Actinic

This way, you'll get plenty of Actinic and blue light spectrum, with the addition of a bluish-white daylight bulb to extend the daylight viewing time...

 

As was said above, you are looking at blue vs. purple. Contrary to popular belief, blue bulbs do not make coral colors "pop". Purple (actinic) bulbs do. However, the blue bulbs have much more PAR than the purple bulbs. If you are running MH bulbs as your primary source of PAR, and you want pure flourescence, I would run mainly actinic bulbs as your T5's. If you have room for only 2 bulbs, I would use both UVL superactinics. If you have room for 4 bulbs, I would go 2 superactinics, 1 blue, and 1 fiji purple/ATI purple plus. With this combo your colors will be amazing.

 

There's a difference between a purple bulb like KZ Fiji, and an actinic 03 bulb that emits UV.

 

I have 4 T5 bulbs.

My current light schedule is as follows....

T5HO actinics on at 8am
HQI on at 12pm (noon). The actinics remain on during MH cycle.
HQI off at 4pm
T5HO actinics off at 10pm

I guess I'll be trying out different combinations for all the suggested bulbs. We'll see what works the best. Thanks for everyone's input.