I have a 75G and I bought some ecoxotic and I am very pleased with the product. I bought two Retrofit panorama and 3 x 445nm blue Panorama pro. I am saving a bunch of money compared to the old MH setup I had. I wish I had bought just the Panorama Pro blue and white instead of the Retrofit Panorama because it is more modular. This summer I had a bunch of LED burn on the pro due to (Just speculations) a very hot summer, saltwater splashing on the LED themselves or not having raisers. Having said that the module were under warranty and the exchange was event free all 3. The growth over the last year has been very good (SPS,LPS), but light only will not guarantee growth. Water quality is very important.
I hope this helps.