Be prepared for a lot of ignorance here... :p
Ok... I have an aquarium very similar to this:
It has two glass hinged covers that sit in each "window" on the top. And then there is a single, long fluorescent fixture that sits on the back side of the glass covers running the length of the aquarium...
I then have a wood canopy that sets on top of the aquarium itself.
I am not very fond of the flight. I am not trying to grow any plants, and don't have any interest in doing so, I am speaking only about the way it lights up the tank. Just doesn't seem to light up the tank very well compared to my 10 gallon (which I understand is not a fair comparison). For example, when my fish swim towards the back of the tank, the light really makes their colors stand out (especially my glowlight tetras).. but when they are closer to the front (or heck, the middle-front) they lose all that reflective coloration...
Are there lighting systems that might more evenly light my tank back-to-front? Would it be worth it to upgrade given that I am not trying to grow plants?
I was thinking of going to a pair of clip-on lights to hang over and ditching the glass covers entirely... but obviously with the wood canopy that would either have to be pretty close to the water.. or close to the wood canopy life.. neither of which sounds like a good idea..
So yes... as you can see I really don't know anything about this subject... any advice? Lighting for purely cosmetic reasons.... nice even lighting front to back on a 75....