CIE, also known as the International Commission on Illumination (CIE), is an organization dedicated to worldwide cooperation and the exchange of information in the field of light and lighting.

Housing is the enclosure or structure that holds and supports the various components of a lighting fixture. It serves as a container for the electrical elements, such as the lamp, driver, and heat sink, and provides a connection to the power source.

Low voltage track refers to a type of track lighting system that operates on a lower voltage, typically 12V or 24V, which offers several advantages.

A nanometer (nm) is a unit of length in the metric system, equivalent to one billionth of a meter. It is commonly used to measure dimensions on an atomic scale and to specify the wavelength of electromagnetic radiation, particularly in the visible part of the spectrum.

Luminous efficacy measures the efficiency of a light source in converting electrical power into visible light. It is defined as the ratio of luminous flux, which represents the total amount of visible light emitted by the light source, to the electrical power consumed by the light source.

An E27 bulb, also known as an Edison bulb with a big screw socket, is a type of light bulb commonly found in residential and commercial settings.

Tungsten light, also known as tungsten incandescent light or tungsten filament light, is a type of artificial lighting commonly used in various applications, including photography.

UL label is a certification mark issued by Underwriters Laboratories (UL) to indicate that a product, particularly in the lighting industry, has undergone rigorous testing and meets specific safety requirements.

A 4-way light switch is a specialized switch used to control a light or a group of lights from three or more locations.