ᐅ Number of recessed ceiling lights in the upper floor hallway

Ok, so warm white

Just a quick reminder that you’re talking about all sorts of lighting here, but not spots. Spots have the characteristic of illuminating a very focused point (spot = point), whereas you want more widespread lighting (120° beam angle), which is fine, but then they’re not really spots. Call them ceiling spotlights or downlights if you absolutely need the English term.

Aside from that, I would strongly advise against choosing those cheap inexpensive recessed spotlights with a weak output of 300–400 lumens. A good LED spotlight provides about 100 lumens per watt, but yours only manages around 60. I use ones with about 1100 lumens, which are dimmable and have adjustable color temperature. They usually run at around 40% brightness but can get very bright when needed.

We will use 3000K as the color temperature everywhere. In my opinion, this is more pleasing than the usual warm white, which is typically 2700K...

Take a look at the Ansorg Coray series for recessed ceiling lights for the hallway. Two units are sufficient for the hallway if you consider the living area. We achieve extremely pleasant, color-accurate, and even lighting with these. Diameter and installation depth should be taken into account.
Technically, this is retail lighting—but simply done excellently.

In case anyone notices: yes, the lamps and square heating elements are not centered in a straight line.

And what price are they asking for that?

But there is also a third lighting fixture missing in the middle.
And yes, those offset heating units, argh.