I installed the Reefbrite Lumilite on my frag system's refugium a couple of months ago to see how it would do. Honestly, I had a feeling I'd need two of them to handle that area. Still, I had to test it out to see what it could do rather than supercharge my results. Water parameters on that system wander a bit because I don't watch it as closely as I do my reef, but despite that the macro algae has done quite well.
A few months ago, I got a Lumilite to try out over my smaller sump's refugium. I wanted to see if it would do the job adequately for my customers that buy my sumps. I placed it over the zone, plugged it into the Apex so it would turn on and off daily.
I noticed the macro algae is growing well under this daylight spectrum LED fixture, and I really do like the low profile look of the light.