What does this image have to do with wall lights with plugs (or wall sconces with in-line switches if you’re posh or American or posh and American)?

I have this empty and slightly awkward narrow-but-tall stretch of wall next to the sofa, above the side table. In an ideal world I would have had it wired for a wall light when we renovated the ground floor, but as is often the case, our plans evolved as the renovation went along and it wasn’t until we finished I realised it was the perfect spot for a wall light.