While light bulb sockets don’t change much from region to region, they definitely aren’t all the same. For the bulbs (not the bars), there’s two large categories: Edison screws and bi-pin. Edison screws also come in a lot of sizes. When compact fluorescents were rolling out, they got a new bi-pin connector from the USA: GU24. My whole home has GU24 fixtures (not by my own choice), but my lamps are Edison screws.
While light bulb sockets don’t change much from region to region, they definitely aren’t all the same. For the bulbs (not the bars), there’s two large categories: Edison screws and bi-pin. Edison screws also come in a lot of sizes. When compact fluorescents were rolling out, they got a new bi-pin connector from the USA: GU24. My whole home has GU24 fixtures (not by my own choice), but my lamps are Edison screws.