[Doug]

Great shots Reefmaster. I also have been trying a 400watt 55K. I also see no comparison between it & my 400 65K. The 55 is a much crisper colour.

How used is the used 55. I have been wondering if it has the great longevity of the Iwasaki.

Harker,s comment on the same type of post on FishNet, was that the 65K,contains more of the blue spectrum used by corals, than the 55, which perhaps could make the 65 a better overall bulb.

Of course in your situation, running the 20 in the center. takes care of that.

Even though its a nice crisp white, my corals dont look as good compared with running a 400w 12K plus 65K supplementation or even better was my 175 10K----400 12K-------175 10K