Thumbs up to Patrick at AA. I fell in love with the ATI Dimmable Sunpower fixtures last Saturday at the shop. I sold my Radion. I wasn't too happy with the coloration on some corals especialy red. I called Patrick and he actually had a 6x24" dimmable Sunpower at the shop! I went and picked it up. This thing is the best made fixture I've ever seen, it's built like a tank. The air flow is ingenious. The programming couldn't be more simple. I read one page for 5 minutes and programmed it. I five year old could do it.