I suspect you can set them (green and red) to your viewing preference. I'd probably set the UV to full. Almost all manufacturers are using certain ratios / proportions of blue, royal blue, green, red leds that are already in a fairly balanced range. If your fixture had a ton of individual red or green LEDs, you'd need to worry more about screwing things up. With that said, I don't think you need much green or red. The popular radion SPS AB+ program sets their white, green, and red channels at 24% I believe. But I can't comment on the ratio of non blue / purple nm led spectrum vs versus blue / purple in the radion compared to the GHL. My guess is they are probably similar