Shining light on a wall is something that has been done for a very long time. "Wall washing” as it is called, can enhance a room on so many levels. The general concept is to have light shine on the wall evenly to create a uniform distribution of the light.
Wall Washing vs. Accenting
Traditional “wall washing” has been used for years in commercial applications and has become more popular for residential installations as well. Wall washing can make a space look bigger. It can add interest by highlighting texture of the wall surface or brighten up wall colors or wall coverings. Wall washing is an even approach to lighting a wall vs. accent lighting such as shining a spotlight on a picture. Wall washing is about illumination whereas accenting is about highlighting an object.