I recently bought three for my 265. I am still going to run my old reefbreeders (point source versus line source, and all that) lights still, though the Kessils may ultimately eliminate the MH that I still run a few hours a day. Not sure I have had the long enough to draw any meaningful conclusions. I like the appearance of the tank a lot more, though I am having a touch of STN on one of my older colonies that may or may not have anything to do with the new lights.