Color Shift

A change in the color output of a light source over time, often due to aging, temperature variations, or electrical fluctuations.

Color Stability

The ability of a light source to maintain its color characteristics over its operational life, resisting shifts due to aging or environmental factors.

Color Consistency

The degree to which a light source maintains uniform color output across different units and over time.

Planckian Locus

Another term for the black body locus, indicating the path of color temperatures of black body radiators on a chromaticity diagram.

Black Body Locus

A curve on a chromaticity diagram representing the color of ideal black body radiators at various temperatures, serving as a reference for color temperature.

Chromaticity Coordinates

Numerical values that define the color of a light source based on its position on a chromaticity diagram.

Colorimeter

An instrument that measures the color characteristics of a light source, including chromaticity coordinates and correlated color temperature.

Lux Meter

A handheld photometer specifically designed to measure illuminance in lux, commonly used in lighting assessments.

Photometer

An instrument that measures illuminance or luminance, assessing the intensity of light in a specific area or direction.

Integrating Sphere

An optical device used to measure the total luminous flux of a light source by capturing light in all directions.