Are you serious, that's way too few, one outlet per room? Five in the bathroom, five in the hallway downstairs, four in the kitchen, etc.
Depends, she wants a lot of indirect lighting anyway, which is anything but illogical (in my opinion), so that can certainly fit. In the planning you can only see the direct lighting.
We faced the same many questions. I also initially calculated with the formula that is often found on the internet, but in the end, contrary to the calculation (60-degree beam angle), I installed LED spots (230 volts, approx. 3.5 cm flat) with 110-degree beam angle, which are dimmable. In my opinion, the difference between 40 degrees and 110 degrees beam angle is already significant. I also ordered several spots "for selection" and chose the best. It’s not only the beam angle that matters here, but also the light color (Kelvin number) and personal comfort. Otherwise, I recommend arranging the spots appealingly (symmetry, mentioned distances). Then nothing should go wrong.
Best regards
Thanks for the info, then at least we probably won’t go wrong with the beam angle.
Do you still remember how many lumens you installed per room per square meter or how many lumens the spots have? Are 200 lumens / sqm enough for a hallway, for example, or would that be too "dark"?
I would also plan some cables for wall lamps for indirect lighting.
Spots remind me of the 90s, when halogen was new and still up to date.
Also decide which lights should be dimmable (DALI control requires 5-core cables).
Don't forget plenty of power outside (separately fused), as well as separate house number lighting next to the entrance light.
Tastes differ so much, I find nicely symmetrically placed spots quite timeless.
Dimmability and outside power are good points to consider early on.