I'll take a different perspective.
I'm running a brand new setup 10g under both white LED's and royal blue LEDs ("actinic", in a sense).
While I cannot comment on the growth of the plants, since I've only had plants in this tank for two days, i can comment on the overall look. I think the blue "punch" afforded by the RIGHT bulb is nice (Ie, a "blue" bulb instead of a "violet" bulb-- they both get called "actinic"---- you want the "blue" bulb--- much more photosynthetically active spectrum, 460nm).
Now some comparison shots. Forgive the scuzz growing on the herb pots
and keep in mind this tank has been running for only a week-- the setup is NOT complete yet
White-only (13 cool white Cree XPG). Nice, but kinda washed out. Neutral white would have been a better choice I think.
Cool white XPG along with Royal Blue XRE (13 of each)
Just for giggles, Royal Blues only. This is kinda uncomfortable to look at.