I am stuck between Radium 20k or Phoenix 14k, my fixture is a 150w coralife HQI(the one that clamps on the back of the tank) unit and it needs a new bulb its over a 58g tank. How useful will the light be with a 20k bulb vs the 14k which I've read the corals can use more of the spectrum. I have no actinic supplementation and no real intend to build a hood for the tank. It will be filled with mostly beginner corals for now nothing hard although i do like alot of LPS
thanks for the help
thanks for the help