The architecture of light: architectural lighting design concepts and techniques. A textbook of procedures and practices for the architect, interior designer and lighting designer pdfdrive com

Reflected Ceiling Plan (RCP): An architectural plan that shows the contents and details of an architectural ceiling system as it would appear if viewed from within a space.
Re-strike Time: An expression of the time required for a light source to cool off
before it can be reignited after an interruption of power. Commonly used in reference to HID sources.
S
Sconce: A wall-mounted lighting device commonly associated with a decorative character.
Seasonal Affective Disorder (SAD): A human physiological condition
associated with inadequate exposure to various wavelengths of light contained in daylight.
Soffit: An architectural feature of geometry added to a space through built-up
construction
Solar Geometry: The predictable movement of the sun in the local sky, due to the earth’s rotation, revolution and declination.
Specular: Description of a material’s ability to directly reflect light images.
Commonly expressed as “shiny”.
Spot (Light): Describes directional light delivered in a confined beam as a result of interaction with optics and reflectors.
Step Light: A luminaire that typically recesses into the lower portion of a wall for the purpose of illuminating stairs.
Steradian: A unit of spherical area such that any size sphere consists of 2π
Steradians. Used in measuring luminous intensity (see Candela).
T
Transformer: an electromagnetic device that alters the voltage of electricity delivered to a light source.
Translucent: The descriptive property of a material that allows light to pass
through but alters the direction of the light, resulting in diffusion.
Transmission (of light): The passage of light through various materials.
Transparent: The descriptive property of a material that allows light to pass through it with minimal refraction or change of direction.