Will, didn't you switch to the Lumenarcs?
BTW, some background, this isn't for an SPS tank, so I'm not too worried about SPS colour. I'll probably put some of my LPS on the bottom (they don't need a whack of light anyhow) and some of my less offensive softeys (gorgs etc) along the sides of the patch reef. The top real estate of the bommie will be the prime real estate and that's reserved for my ritteri.
So I'm kind of thinking that maybe 250W DE is something to try here. I'm still just a little unconvinced that it will be enough though... I dunno. Don't really want to go to two lights, at that point maybe just a single 400W is better after all.
Tank is a 115g cube (30"^3).