Nice thread. I run an old DIY system. Used to be all Crees, but over time these have fizzled out. All replaced with Bridgelux LEDS now. I'm very happy with them. Currently run 4 banks of 13 LEDS over a 4' tank.
Colour is a mix of B/RB / 6.5K-10K W / 450 nM pinks / Greens. I have experimented with reds, but these were overpowering so replaced with pink which gives a nice hue. I also invested in UV LEDS, gave them a run for 4 months, bloody things done a lot of damage, so now gone.....all are driven between 9 to 12V / 750 mA. The Bridgelux LEDS so far are coping at this level fine. I also run 80 degree optics.
I also run a vertex blue LED setup used for additional asthetics which I run in the morning / evening.
My reef is mixed, and my SPS / LPS are going well. I do struggle with purple SPS, but pinks go fine. My shortcake and milli go well and growth throughout is great.
My PAR throughout was a little down, 300 at the water line down to 75 at the substrate, but the optics really improved this where now I have 450 at water level, 300 at most SPS to 125 at the substrate.
Thanks for posting a nice thread, very interesting.