That might well have been the public perception, but obviously was not true of domestic intsallations - which were so crude that one was 'lucky' to have a single, simple, meter I think the main reason for use of these 'lampholder adapters' was the serious paucity of power sockets. One per room (and not all rooms) was the norm at one point.I seem to remember being told the power and light had a different tariff in early days and using the lighting supply was cheaper.
Tell me that's not a wooden laptop behind the radioDo you remember houses looking like this?
Kind Regards, John.