I use Kessils. I have 4 on my 5’ long tank. That is barely enough for an anemome and only near the surface. My tank is deep also. The Kessil 360 Narrow May be something you can add to get light deeper. You might be able to use a second Maxspec. You could even add some good quality T5s, maybe 2, 2bulb fixtures to what you already have. I can’t say for sure that will be enough to save it. Or support a new one.
Deep tanks are always a bit difficult to light.