[112233]

You can't imagine how much kilometers of in-wall electical cable installation (at least done euro-style) one can avoid by replacing normal light fixtures and switches with a single group relay, some tracks, and some matter bulbs.

Once everything is set up and switches are magnetically attched to walls, it works just like the dumb lights, but without 230V all over the place. Just need to swap coin battery once a year.

Plus, you can go fancy with colors, dimming and stuff, if you get the urge.

(also, if you ever had home fire because mismatched dimmer switch combusted, you would not want that stuff anywhere near your home)

[crngefest]

That is a fair point but only applies if you are building a new home. I don’t think it’s feasible to retrofit an existing home in this fashion.

[112233]

Agreed, existing wiring is better of with dumb bulbs (you can keep using existing switches), except if you want to add dimming — I have no idea how normal person can figure out which lightbulb will not burn down given wall dimmer switch (along with the whole house), if it all fits into E27. Integrated lightbulb seems safer.