On paper, or in a lab setting, I'd agree that targeted spectrums can make a difference. But in the real world, where there are so many variables, I'm not convinced that these fancy mixed-diode lights offer any practical benefit. We've seen over and over that raw photon output and uniformity are the most important and impactful factors in the success of a light. Adding monos might help, but getting the right amount of light to as much of the canopy as possible will do far, far more for you than reds and blues.
I'm still waiting to be impressed by ChilLED's mixed-spectrum boards. Everyone's excited by them, but no one's showing results to prove that the monos they added give them any advantage.
