I tried this exact light, it burned out within a month of installing. The guy did send me a new one that I haven't re-installed. As for corals, I didn't have anything but low light corals at the time. The problem is you have to pretty much seal the back of it from being able to get water on it with silicone or salt water will get in it and short it out. That is a suggestion in the instructions, not a requirement. I did ask him some questions about PAR level, etc and he had no clue. Long story short, I wouldn't recommend it, although I've got a brand new 9 ft strip I'll make you a good deal on.