This shows the 2 plugs that I built into the living room floor. The one at the bottom of the pic is easily visible; the other is in the tar paper where the next wood strip will be fitted. We'll have sofas/chairs on either side of a table in the center of the room, and will have lamp(s) next to them. We didn't want to run extension cords across the floor to the center of the room, so we added these plugs that will be hidden by the furniture.