Gallium nitride-based light-emitting diodes (GaN-based LEDs) are semiconductor devices that emit light when an electric current passes through them. These LEDs are constructed using gallium nitride (GaN) as the semiconductor material. GaN-based LEDs...

A halogen lamp, also known as a tungsten halogen, quartz-halogen, or quartz iodine lamp, is an incandescent lamp that uses a...

A lumen is a unit of measurement used to quantify the amount of luminous flux, which is the perceived power of light. In...

Chip-on-board (COB) lights refer to a type of LED lighting technology where multiple LED chips are directly mounted onto a...

A filter that serves to alter the color temperature and the mired value of the radiation emitted by a source.

With respect to a chromaticity diagram, this is the locus of points that represent the chromaticities of blackbodies...

A device containing two photocells behind deep red and blue filters to measure color temperatures. The amplifier gain is...

Temperature of the blackbody having chromaticity nearest to that of the test source on a specified chromaticity diagram.

An approximated measure of the smallest change in color temperature detectable by the human eye, defined as the reciprocal...

A colorimetric concept related to the apparent visual color of a source (not its temperature). For a blackbody, the color...

A colorimeter is a device used to measure and quantify the color characteristics of an object or a light source. It provides...