Standard CIE Illuminants

colorimetry

The methods used to measure color and to define the results of the measurements.

tungsten lamp

An evacuated bulb containing a tungsten filament that is heated by passing an electric current through it. In domestic light bulbs the inside of the bulb is frosted to soften shadows. In projection lamps, the filament is very compact and enclosed in a clear pyrex bulb.

cie

Commission Internationale de l'Eclairage, the international commission on illumination.