Thanks! It's worked out very well so far. With nearly 6 months of R&D + Build time it is very rewarding to see it working out over the tank. With this light I have not seen the typical bleaching that I have with other LEDs; I attribute this to the diffused light (compared to the lensed LEDs in other common setups). At ~300 watts total for the unit, it is a lot of light and compensates for the diffuser losses.
Bummer alert - My return pump (eheim 1250) just failed. Completely my fault. I was acclimating some new anthias and the return chamber ran low. Seems that the pump overheated and the magnets seized. That's too bad because this pump has been with me for 5 years and had been used for 4+ years by the previous owner. 9+ years isn't bad, and I congratulate Eheim on making such awesome and durable pumps.
Right now I am running a very low power return from the sump to the main tank. I might only be getting 25-30gph. This is no good of course, and I have a Jebao DCP 5000 on the way. I'm excited to try out this DC pump and also to get some more water flowing through my tank (~700-1400gph is offered, which is significantly more than the 350 from the eheim. I'm expecting to run this pump on one of the lowest settings.