I would have to disagree about LED's and SPS. I have a few in my tank and they are growing. In fact, one is popping up everywhere in my tank and growing and I have a 30" tall tank. I have one SPS frag at the bottom and its growing too, but very slowly. Could there be improvements, of course but they are there now. I think you are going to see more of these lights lht the market. Fauna Marin has one of these in production in Germany right now. It will not however be available in the USA they are busy with there dimmable T-5 unit right now.