So I'm not sure what kind of light that I have.. I was given it w the tank. So looking for a new one soon. I don't wanna drop 500 bucks though. So I'm looking for reasonable. I know they are expensive and such but I only have a 45 gallon tall tank. I don't under stand the 20k talk or what full spectrum really does. I will have coral and fish. I do currently have a Torch. Just need some guidence... there's so much stuff!! Do the blue lights do anything as well? Thanks!