Hoppy is worried there will be color shadows on the interior. Did you see any such thing or did you see a even blend of light ?
I have one spot in my 30C where there's a color shadow and it's in a deep crevice between two rocks. You can't see it unless you're looking directly from the top plus there's no plants in there.
With the 75 degree lens, the color blends at a minimum of 2" (give or take) away from the fixture.