As soon as I added AI Hydra HD's, my coralline started and has continued nicely. I'm about 8" above water and settings lower (roughly U:39, V:39, RB:39, B:25, G:7, R:3, CW:9). I love the light from the Hydra HD's, but I'm finding the software is garbage. One of my lights will NEVER respond to the automatic schedule and just stays off. The only way to control it is manually in the buggy app between crashes. My other light works perfectly, although over time it seems that the auto-schedule has a de-acclimate setting, as in over time the settings become lower and lower on the automatic schedule all by themselves. But at least the schedule continues to fire. AI Support has been competely useless, and limited to restart the light, rebuild the schedule, unpair and re-pair, all which have zero effect in the end.
I would never buy another AI Hydra HD, even though the light they produce is awesome and my corals have loved them. But I can not rely on the software and schedules to work correctly at all, so what's the point. I'm not going to sit there and manually change the settings throughout the day every day, which is the only way for them to be reliable.