TS 12133

TS 12133 is a terminology standard that brings together terms and definitions used in lighting and related photometric subjects. Based on IEC 60050:845, it organizes the common technical language for topics such as vision, colour vision, colorimetry, emission, optical properties, light sources, lamp components, lighting engineering, daylighting, luminaires and visual signalling.

Technical scope of lighting terminology

In lighting technology, precise terminology matters because the same physical phenomenon can be discussed differently in photometry, colour science and application engineering. This standard gathers concepts linked to visual perception, the characteristics of light sources and the language used around daylighting and lighting equipment in one coherent framework. That helps align expressions used across lighting systems, lamp parts and visual signalling.

General subject areas covered

• Vision, colour vision and related quantities
• Core concepts of colorimetry and emission
• Optical properties of materials and optical radiation
• Terms for light sources, lamp components and lighting engineering
• Definitions connected with daylighting, luminaires and visual signalling

As a general technical reference, a terminology standard like this supports designers, researchers, manufacturers and authors of technical documentation by providing a shared language. Lighting systems often combine perceptual performance, colour characteristics, light distribution and application-specific requirements, so clear definitions reduce ambiguity and improve communication.

This TS 12133 entry represents a withdrawn standard, making it most relevant for users who need the historical and technical terminology context of lighting.