Purchased 4 reefi duo extreme lights for my 210 gallon aquarium. Relatively new to the saltwater hobby but have had some experience as a kid with my parents aquarium. Back before all the sump tanks, skimmers and what not. Tanks been up and running for 8 months or so. Been pretty lucky with my water even though I started with hose water. Done several water changes and what not and have not lost many fish. Especially the real expensive one's. I have very few coral. A couple mushrooms, Duncan and something else I'm not quite sure of. Am looking for your preferred lighting schedule for growing healthy corals.