They grow softies. They are not controllable like expensive lights so I use smart plugs for them. They dont ramp up or down but that isnt necessary for coral growth.Holy cow look at that coral in your tank!! I'm about to be sold. I would love to have radions or primes but this is first tank and alot is all learning curve and it's a budget build so I didn't want to go expensive on lights since I'm only going to be growing softies to start out.