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[Dwight]

Depends.

A good photographic compostion tells a story of the space, usually by placing something in the foreground. In this case, a wide angle lens is appropriate - over 60 degrees. After 75 degrees, strange foreshortening occurs and room size is unfairly exagerrated - good for 40 sqm condos......

While the lens chart attached refers to 35mm proportions and measures the DIAGONAL angle - not like ArchiCAD that measures the horizontal angle - it is close enough to start.

I do not believe there's a common angle since it is driven by the composition.

A trick is to invisibleize walls and shoot through them as if your project was a studio - leads to more telephoto shots that resemble catalog photos.

[Dwight]

There's this joke that is relevant to the discussion.

Man goes to his doctor "My foot hurts when I turn it sideways."

Doctor says " So stop doing it."

[Dwight]

try inner 60 outer 120 with angle falloff 2

[Dwight]

do this with one light aimed down to light a wall.

what is it supposed to look like?

play with it until it looks right.

too many fixtures ruins the exercise.