Candles are also used in aromatherapy which also means that you can use the wall decor to make the areas they are placed in more pleasant. There are a variety of scents candles can come with so you can take your pick, once the candles are lit it will diffuse the scents into the area. This is great especially for walls in living rooms so people can relax while lounging.
Candles not only put scents in an area they can even take them out. Lighting a non-scented candle in a room can burn out scents especially unpleasant ones. Leaving unscented candles lit in certain areas that have unpleasant smells or attract unpleasant smells can help manage them. Using candles also costs less than most commercially manufactured deodorizers.