Yeah a single XR30 G4 pro cannot cover the space I need. I'm running 2 Actinics -- One Geisemann, one ATI.
To make up for the missing 6500k spectrum I run my Radion pretty white, my whites green and red are at 45% for most of the day until my evening ramp down. Because I'm also a huge believer in UV/Violet spectrum I've added Actinics opposed to B+ or 6500k (which I'm getting more than enough of from my radion).
I love the 6500k bulbs, I even have two Geisemann tropic 6500k's in my closet.. But the radion has way more than enough red, green, and warm white/white, people just neglect to use them.
Lighting is a complicated subject, which is why T5 and MH usually just "work" for people. They have taken out all the guesswork. With LED's you can now plug and play, but should you need supplemental lighting some consideration needs to be made. What do you want more of, growth, or color? Can you adjust your LED's to give you whats missing? Is shadowing the true problem, or just part of the problem? Etc etc.
6500k light = Unsurpassed growth
UV/Violet = Color (not POP like royal blue LED's, but full color shift)
My most unpopular opinion of all time: Blue+ bulb isn't as good as a full mix with ABS, P+, C+, Actinic. It looks horrible when you just slam 5-7 B+ bulbs in a single fixture.
If I were to run a 6 Bulb Today it would be 2B+, 2C+, 2 Act, an 8 bulb would add a P+ and ABS.
When I get the AquaticLife hybrid I'll be putting 4 actinic in it most likely. Possibly 1 C+.
EDIT: Also, whenever I get my Canopy I will be removing the diffuser from the Radion. Spectrum testing shows it should be no different, and the PAR loss should be negligible as my Radion was only at 40% previously and is now at 100%, but colors were better without the diffuser. Took a year of use to truly determine that color slowly has shifted for me.