We have soffit lighting and only use it on occasion but I’m glad we have the option. I would do it

In what circumstances would one use such lighting?

We use it when we have company to have more light on the house at night than just the porch lights. Also when we are out for the night and coming back when it is late.

These are our own at dusk. I wouldn’t normally have on at this time of night but it was for the photo.

I like a home to be well highlighted at night but do prefer a mix of lighting versus on in the soffit. Has he considered some lighting options from the bottom of the home shining up? Or, the up/down lights for any tall sections (not seeing any right away that would benefit from this one but do see many areas I'd use the lighting shining up versus down from the soffit.)