Create a focal point at the end of the hallway. This works particularly well for hallways that are fairly long: a focal point at the end of the hallway will offer a destination point and distract from the length.
Although most interior photos in magazines are shot with the lights off, it is usually best to turn on all lights for listing photos. That means every overhead, pot light and lamp in the room. Those spots of light draw your eye to every corner of the space, so that a buyer may linger a bit longer on the photo.