Lighting question

[4ptbuck]

I have a 37 bow with 1 96W 10k and 1 96W actinic, and 2 55W 50/50.
So have a total of 302W.

As I was thinking about this, I starting to think what is really required for lighting? This seems like a basic question, and I looked around and did some searches, but nothing came up.

Are the actinics really there just for my eyes? Supplementing the 10k so it makes it look more white/blue.

Would I be better off with more 10k tubes, or 6.5k or 20k. I've seen articles whereas nat sunlight is more in the 6.5k range, but these are probably more yellow and not as pleasing to the eye. But would the corals benefit?

I am pretty sure my 96W tubes are dead. Compared to the 55W, they are not as bright. I am off to J&Ls tomorrow, and am wondering what I should. Right now I am thinking about a 10k and a 50/50.

oh my current stocking for lighting requirements inc: mushrooms, zoos, brain, hammer, deresa and a bubble. Not really light intensive creatures. But my hammer has a molted apperarnce, bleaching? and my bubble has some brown splotches bleaching again?

4pts...