The problem I had with taller tank was while sitting across the room .All that caught the eyes was the underside of the light fixture and the bulbs but the fixture was/is hanging above the tank.
Perhaps with the fixture sitting directly on the tank ,the view would be less offensive.
Yeah, something like that is my concern. Here are three views from the small tank I did. It's in my office where I (and most guests) would be sitting.
From below, so long as the water is above the plastic trim, the water's surface hides any direct view of the light, and it looks just s bit brighter at the surface, surprisingly not all that bright. I like it.
From far above it's not too bad either. The LED+ sits nicely flush. You get a bit of bright from the glass panel I have in front of it, but it is a pretty clean look (especially on the other side with no plumbing and glass fore and aft of the light).
But from above, there is definitely an angle where the LED's just glare out at you. You can move it around by moving the glass, and if you remove the glass it just comes off the water even more strongly. The photo doesn't really show how much brighter it is.
What I was trying to do is avoid this kind of harsh glare, while not having a canopy over the top. But maybe that's not possible.
The other problem I found -- I got a tape measure out with my wife and looked at the size, and it is longer than I thought -- the space we would ideally like to fill is 8'. It could be 7', but a 6' aquarium would be too small (length wise) in that space. Thin is good, but it needs to be pretty long.
I looked at one manufacturer for tanks and a 180 gallon at 96 x 18 x 25 may be a possibility. The 25" would be a lot easier to light, especially if I put some height in the bottom.
But it would need a top.
Certainly need to keep thinking about that. This also may make it more expensive -- I was hoping to find someone local who got disillusioned by the work and get a cheap used one, doubt I can in that size.