That's exactly why there should be an EU standard plug-in light fitting.
Every light fitting should come with this plug (perhaps along the lines of the British "Click" system) so if DIYer wants to install a fancy light fitting all they have to do is unclip the basic one and insert the new one. I've never understood the requirement for hardwired light fittings!
It was and still is quite common here to use BS546 (5amp?) sockets behind suspended ceilings for lighting and for shop display cabinates etc. to make life easier.
I've even seen 1930's lights here in Ireland that were connected to a ceiling rose which had 3 hooks on the sides to support the heavy glass shade with decorative chains avoiding putting strain on the cable (usually a twisted pair). They seemed like a much more flexible and ornate way of doing things.
