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An incandescent lamp's light is thermal radiation, and the bulb approximates an ideal black-body radiator, so its color temperature is essentially the temperature of the filament. Thus a relatively low temperature emits a dull red and a high temperature emits the almost white of the traditional incandescent light bulb.
Illuminants A, B, and C were introduced in 1931, with the intention of respectively representing average incandescent light, direct sunlight, and average daylight. Illuminants D (1967) represent variations of daylight, illuminant E is the equal-energy illuminant, while illuminants F (2004) represent fluorescent lamps of various composition.
An incandescent light bulb, incandescent lamp or incandescent light globe is an electric light with a filament that is heated until it glows. The filament is enclosed in a glass bulb that is either evacuated or filled with inert gas to protect the filament from oxidation .
An incandescent lamp has a continuous spectrum, a fluorescent lamp has a discrete line spectrum; implying that the incandescent lamp has the higher CRI. The value often quoted as "CRI" on commercially available lighting products is properly called the CIE R a value, "CRI" being a general term and CIE R a being the international standard color ...
An incandescent light bulb has a CRI of 100. [1] High-CRI LED lighting is a light-emitting diode (LED) lighting source that offers a high color rendering index (CRI). CRI is a quantitative measure of a light's ability to reproduce the colors of objects faithfully in comparison with an ideal or natural light source.
The color temperature of a white light source is the temperature in kelvin of a theoretical black body emitter that most closely matches the spectral characteristics of the lamp. Incandescent light bulbs have a color temperature around 2700 to 3000 kelvin; daylight is around 6400 kelvin. Lower color temperature lamps have relatively more energy ...
Print/export Download as PDF; Printable version; In other projects ... Filament of a clear incandescent lamp [13] 10 8: 100 Mcd/m 2: Possible retinal damage [4] 10 9 ...
Sold as "specialty lighting", Edison-style incandescent lamps are exempted from the ban in most places. [ citation needed ] More contemporary "Edison light bulbs" are designed to replicate the same light color and bulb shape of the original, but offer a more energy-efficient version to Rosenzweig's popular vintage reproduction bulbs (modern ...