I have a corallife 2x 150 metal halide fixture with power compacts. 1 power compact is purple purple, the other is purple blue. I don't know how old these metal halide bulbs are but I'm planning on getting some HQI 150 20k bulbs to bring out the blues. I've been running this way for almost three months. I'm keeping an eye on my tank. It's sort of been an expirement for now. If it comes down to it I'll try to fix my sump. Even then I ran it for 3 months with only a skimmer and my current equipment. Also I can see pods
on my glass running around.