Here is the "before" photo for the project. Notice the lighting: two matching lamps. Nothing special- just balanced on both sides.
Then the fireplace was finished, and the space for the lamp on one side was now taken up by a piece of furniture for the TV stuff.
So now we at least have a workable solution, though it is nothing fabulous. We found a table lamp which looks similar to the original floor lamp.
Perhaps one day we will do something permanent with lighting in this room, like sconces or track lighting or something.