Oh..I have 4 of the first generation fixtures which are not dimmable. Obviously, these are at 100%. The other two I have over the frag areas I am slowly turning up over a few month long acclimation period. My main display is 25" deep, and everything is doing well under them at 100%.
Some things I've noticed are more sensitive and require a much longer acclimation period, like long tentacle anemones, and some LPS
, and these are in the back tanks at the moment. Right now I have the blues all the way up and the daylights at about 50%.