I use a Maxspect R420R 16k LED on my JBJ 30 gallon cube. It is about 16-18 inches deep and the lights are about 4 inches above the water. I currently run the lights white channel at 40-65% dung the days, and blue channel from 50-75% during the day. I have great color but not much growth and half of my zoas either stay closed half the time, or just don't grow well. Not sure what the issue is, but are there others here running that same light, and at what percentages?

