Lighting design for a multi-story apartment with indirect LED lighting

Oh dear, who was so eager there? Does someone want to make money off you or was that your (naive) idea?
Bathroom: 1 spotlight at the toilet, 1 spotlight in the shower, 1 light in the middle of the bathroom, and otherwise mirror lighting.
Leave 15, 16, 17, 18 and add a 17a in between 17 and 18 in the cross.
One central outlet in every room and task lighting in the kitchen, possibly pendant lights over the island.
Enough sockets for lamps.
The dressing room is a mystery to me; as it is, one central ceiling outlet is enough. If there absolutely must be spots there, then extended towards the hallway and not offset.

I'll put it this way: I am building my first house and have seen a lot on the internet. I want it to be cozy and maybe I’m also a bit afraid of planning the lighting too dim.
Regarding the KNX, I don’t know if there are lights that can be set to both cool white for daytime and warm white for the evening? Yes, the dressing room is also a bit small and more like a clothes chest. A small planning mistake, but we are making the best of it. Pendant lights would also be a good idea but might clash if a pendant light is also placed over the dining table. What do you think about the lighting in the room? I have already planned indirect lighting but think that spots do help during the day.

I basically find it okay. First of all, it needs to be clarified which ones they should be. For example, panel lights or something else. And then optimize the placement with light intensity and beam angle. The spots in the shower and toilet are, in my view, still improvable.

I basically find it okay. First, it should be clarified which ones they are supposed to be. For example, panel lights or something else. And then optimize the placement with light intensity and beam angle. The spots in the shower and toilet are, in my view, still improvable.

I find it particularly difficult to choose the placement for the pendant light even though no table has been selected yet. I believe the placement in the center of the living/dining area fits as such.

Regarding KNX, I don't know if there are lights that can be set to both cool white for daytime and warm white for the evening?

Yes, although pure warm white spots are enough for us.

I can't think of any for 230V at the moment; there are some for 24V spots, but the whole 24V spot topic is a bit more niche. Alternatively, there is DALI. Also, there are spots that are warm white at lower brightness and cool white at high brightness.

I recommend visiting the KNX User Forum ;)

With KNX and the presumably available dimming options, spots can work well.

I want it to be cozy

Ceiling lighting is never. . NEVER cozy. Whether dimmed, with a switch or KNX. It serves for overview. Therefore, practically a bright little light on the ceiling is enough if you’re working on something, searching or else.

but I think spots help during the day.

During the day, natural window lighting should be sufficient. If not, in recesses, angled hallways or dressing rooms, then a spotlight on the ceiling is enough.
But since spotlights and little lights are not nice, there is a wide range of flexible ceiling lighting. Flexible because you can change it. Over the years you can adapt to new standards or switch from a flat modern fixture to a playful two-flame variant. Etc.

Pendant lights would also be a good idea, but could clash if a pendant lamp would also be placed over the dining table.

You can take the same ones if you’re not confident with style. Just check lamp sites: Lampenwelt, Prediger, home24 and all the others. Most designs are available somewhat cheaper elsewhere. Sorry, but if you know what you’re missing, spots look pretty poor, even though you have to pay disproportionate amounts of money.

I’m building my first house and see a lot on the internet.

If you only see spots, then your Google is broken or the user always looks at the same thing.
It’s never bad to ask, but sometimes you’re just completely wrong – then this is also clearly defined here.

I find it especially difficult to choose the placement for the pendant light even though no table has been selected yet. I believe placing it centrally in the living/dining area fits as such.

No matter how big the table is: it also has its invisible thread it will and should orient itself to, e.g. at the middle of the sliding door. The center of the table will probably also be on this horizontal line. Contemporary lights allow some flexibility in their placement