Moving to a larger tank so I need a bigger fixture. I wasn't real happy with the factory spectrum so I added a few things. Removed one red and replaced with a hyper red, pulled a green(one grn left) and swapped a couple warm whites for cool whites. Overall it looks a lot more appealing and it seems to have helped with color on my sps's. In particular my pink and green birdsnest are a lot lot more vibrant after only a couple months, and growth is noticeable, although I dont think anymore or less than when it was the basic spectrum. I also have a bag of at least 25 diodes so you can swap them around if you so choose to do so. Price is $170 shipped to the lower 48 and am VERY FIRM as its over half price for what your getting. Buyer pays paypal fees or sends as gift.