Architecture: Light

a downlight mounted close to the plane of a wall equipped with a reflector, baffle, or lens to illuminate the vertical surface

a lamp designed to project or diffuse a comparatively uniform level of illumination over a large area. also called flood, flood lamp

a luminaire consisting of a lamp set in a metal cylinder, recessed into or mounted on a ceiling to direct a beam of light downward

a lamp designed to project a strong, focused beam of light on an object or area. also called spot

Superfluous or useless light rays, as from a spotlight or other focused light source. also called spill light.

a light source having a maximum dimension less than one fifth the distance from the source to the surface illuminated

a light source having one dimension significantly greater than its other dimensions, such as a fluorescent lamp

a light source having significant dimensions in two directions, such as large window or a luminous ceiling

lighting provided by adjustable spotlights mounted along a narrow, ceiling or wall-mounted metal track through which current is conducted

indirect lighting directed upward from an interior cornice at the edge of a ceiling