Wall washers and grazers are used in the treatment of vertical surfaces, which impacts the psychological response to a space, overall perception of brightness, and visual comfort. Wall washing and wall grazing are the two most commonly used techniques to enhance vertical surfaces in architectural settings. The vertical surface treatment is intended to make a room appear more public and spacious, articulate texture, and increase illuminances. LED wall washers create a soft, uniform glow to bathe a vertical surface in light. These luminaires produce an asymmetric, forward-throw light distribution across the entire wall. The smooth, graded wash of light eliminates shadows to hide imperfections and flatten the wall's visual appearance. Wall grazing lights are used to emphasize the texture of a vertical surface.