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Bulb brightness scale2/16/2024 ![]() Although the concept of correlated color temperature extends the definition to any visible light, the color temperature of a green or a purple light rarely is useful information. In practice, color temperature is most meaningful for light sources that correspond somewhat closely to the color of some black body, i.e., light in a range going from red to orange to yellow to white to bluish white. The color temperature scale describes only the color of light emitted by a light source, which may actually be at a different (and often much lower) temperature.Ĭolor temperature has applications in lighting, photography, videography, publishing, manufacturing, astrophysics and other fields. Color temperature is usually measured in kelvins. The temperature of the ideal emitter that matches the color most closely is defined as the color temperature of the original visible light source. The CIE 1931 x,y chromaticity space, also showing the chromaticities of black-body light sources of various temperatures ( Planckian locus), and lines of constant correlated color temperature.Ĭolor temperature is a parameter describing the color of a visible light source by comparing it to the color of light emitted by an idealized opaque, non-reflective body. JSTOR ( June 2012) ( Learn how and when to remove this template message).Unsourced material may be challenged and removed.įind sources: "Color temperature" – news ![]() Please help improve this article by adding citations to reliable sources. Light appearance, measured by correlated color temperature (CCT) on the Kelvin (K) scale, from warm to cool.This article needs additional citations for verification.Estimated yearly energy cost (similar to the EnergyGuide label).The label includes the following information: Like the helpful nutrition label on food products, the Lighting Facts label helps consumers understand what they are really purchasing. It helps people buy the lightbulbs that are right for them. To help consumers, the Federal Trade Commission requires manufacturers to include a product label for light bulbs on the package. ![]() What Should You Look For on the Package? The Lighting Facts Label
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