Building facade and architectural structure lighting serves many purposes including prestige, safety, symbolism, and recognition. They facilitate orientation, enhance the intrinsic charm, convey messages, communicate emotions, and create attention. Architectural lighting may include wall washing, wall grazing, column lighting, linear flood lighting, spot lighting, silhouetting, coloring, outlining, or any applicable combination of these techniques. Architectural lighting luminaires are designed for large-scale installation, e.g. city landmarks, commercial skyscrapers, buildings with historical significance, large retail exteriors, bridges, piers, public monuments, and themed attractions. Products fall within this category include LED wall washers, architectural floodlights, spotlights and projectors, borderline lights, linear fixtures, digital tubes, etc.