Lighting | small knowledge with apparent what parameter indicates the light source color? - China lighting network

Commonly used chromaticity coordinates, color temperature ( Color temperature) And correlated color temperature and other parameters to represent the color of the light source. It is an important factor decided to color lighting space atmosphere. Light source color chromaticity coordinates can be formed by its spectrum and CIE color matching function is calculated, and coloring products by means of a point on the map. Although this approach method is very accurate, but not intuitive. If you don't see chromaticity diagram, just according to the chromaticity coordinates, it is hard to imagine what is the colour. Early humans mainly use various flame light sources and incandescent light source. People know from everyday experience that incandescent body? （ Like a red-hot iron, incandescent lamp filament) Luminous color and it is directly related to the temperature. Low temperature, smooth color slants red, yellow, The high temperature, light color is white, slant blue. If use temperature to represent the color of the light is simple, and intuitive. Absolute black and incandescent body belong to thermal radiator. The color of the black body can be determined by its temperature. If the color of the light source and a blackbody glowing colors are the same, then the blackbody temperature of thermodynamics ( Unit for K, pronounced 'on') Is the color of the light source temperature, hereinafter referred to as 'color temperature'. If knew the color temperature of light source, therefore, not only to know that it is roughly the color of the light, can also according to its relative spectral power distribution in the Planck's formula, which can also calculate the chromaticity coordinates. All kinds of gas discharge light source color, with the most can't find the same color of the black body, only to find its light color closest to the blackbody, the thermodynamic temperature of the blackbody is corresponding correlated color temperature of light source. Some the color of the light source and spectral color close to, and far from the color of the black body, such as a variety of color fluorescent lamp. At this moment the concept of correlated color temperature is meaningless, but had to coloring product coordinates to indicate the color. Different color temperature ( Correlated color temperature) Light sources are often different psychological feelings to the person. Less than 3300 k color temperature light gives a person with the feeling of sweet, warm, customarily called them warm color light source; The light of the color temperature greater than 5300 k to calm, cool and refreshing feeling, called cool color light source; Color temperature is called the neutral shades between the two light sources. In indoor lighting, guest room, bedroom, bars and restaurants and other places general use warm color light source; Office, classroom, reading room etc general multi-purpose neutral shades light source; The stadium building general use cool color to move the light source. YanZhiXiang

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