Sorry for necroing this thread... It's the only one I've been able to find discussing the 50/50 XHO spectrum specifically.
I'm considering lighting my 48"x24"x16" SPS dominant reef with 2 x 50/50 XHO bars + 2 x Kessil A500X...
Originally was going to go with XHO actinic supplementation, but am leaning towards the 50/50 as it would provide (what I see as) a better spectrum for the blanket light (and understanding coverage limitations of the point-source Kessils.)...
Also considering spectrum performance of the 50/50 vs standard 4 bulb t5 supplementation of the Kessils.
Thoughts on the XHO vs t5 combo for supplementation? (Would be 2 x XHO 50/50 or 4 x t5).