what I don't find easy to imagine is, for example, with built-in LED spots to determine a) how many need to be installed in the hallway/entrance area, b) how many lumens with c) what beam angle. So that you don't feel like you're on a football field in the hallway (absolutely overlit) or that it's planned too dark. The same problem could arise in the bathroom: not too dark and not overlit in the end.
Especially c) the beam angle in combination with the ceiling height and b) the light unit lumen is not so simple in my opinion.
Much easier and really available on all websites, for example, is the color temperature (around 4k Kelvin for workspaces, around 3k for cozy and rather yellowish light, and thus living spaces). Also clear that for the bathroom mirror it's best to have bright light (4k Kelvin) from the front and not from above. The same applies to the kitchen, so you don't have to chop in your own shadow.