Let's start with the preliminaries. I loved my ATI. I've always felt a little like LEDs were holding me back, even when combined with t5s. I couldn't put a finger on it but things never felt quite right. I have tried to studiously avoid arguments about what light is best. Eliminating the variable of LED doubt became, for me, a definite goal however. My problem has always been getting my wife to agree a light fixture is sufficiently attractive to use in our living room. That eliminated many of the black plastic options. After some research, I decided to try the Geissman Spectra Infinity. When we opened it at the store I was concerned. It didn't quite have the weight and solidity of the ATI and I wasn't sure how the powder coated surface would look. Well, assembled it looks amazing and feels rock solid. My doubts are long gone. It doesn't have the fancy settings that come with LEDs. I have to make do with old school timering of the t5s and the halides. Turns out, that works just fine. It isn't summer yet, but so far heat does not appear to be an issue. As for my tank, the 20k Radium bulbs look amazing accented with ATI bulbs. It's been a little over a week and growth looks to be picking up, polyps are extending more, and colors are differentiating and showing themselves off. My tank water is actually clearer than it was, my algal growth looks more natural, and there is less dusting on the glass. I'm also seeing corals that we're spending most of their time encrusting start to develop growth tips in more natural patterns. I'm really happy so far and I'll try to keep you updated.