Color temperature is a physical quantity used to define the color of light source in illumination optics. That is to say, when a blackbody is heated to a temperature, the color of the light emitted by the blackbody is the same as that emitted by a light source, the temperature heated by the blackbody is called the color temperature of the light source, for short, the color temperature. Its unit is expressed as “K” (Kelvin temperature unit).
The color temperature of LED is expressed by absolute temperature K. When a standard blackbody is heated, the color begins to change gradually from dark red to light red to orange yellow to white blue. When the color of a light source is the same as that of a blackbody, the absolute temperature of the blackbody is the light source at that time.
1. The characteristics of LED color temperature, low color temperature: color temperature below 3300 K, red light gives a warm feeling; a stable atmosphere, warm sense; when illuminated by low color temperature light source, can make the object show more bright color.
2. The characteristics of LED color temperature, medium color temperature: the color temperature is in the middle of 3300-8000K, people have no obvious visual psychological effect under this tone, and have a refreshing feeling; so it is called “neutral” color temperature. When the object is illuminated by a medium temperature light source, the color presented by the object is cool.
3.The characteristics of LED color temperature, high color temperature: the color temperature exceeds 8000K, the light color is bluish, giving a sense of cooling. When illuminated by high color temperature light source, the color presented by the object has a sense of cooling.
|<3000K||Warm (reddish white)||Steady and warm|
|>5000K||Cool (blue and white)||Cold|
Definition of color temperature: When the color of light emitted by a light source is the same as that emitted by a black body at a certain temperature, the temperature of the black body is called the color temperature of the light source.
Because the light emitted by most lighting sources is generally called white light, the color meter temperature or related color temperature of the light source is used to refer to the relative white degree of its light color, in order to quantify the light color performance of the light source. According to Max Planck’s theory, a standard blackbody with complete absorption and radiation capacity is heated, and the temperature gradually increases and the luminosity changes accordingly. The black body locus curve on CIE color coordinates shows the process of blackbody from red-orange-yellow-white-white-blue-white. The temperature from blackbody heating to the appearance of the same or near light source is defined as the relevant color temperature of the light source, which is called the color temperature, in terms of the absolute temperature K (Kelvin, or Kelvin temperature) (K= C + 273.15). Therefore, when the blackbody is heated to red, the temperature is about 527 C, that is 800K, and its temperature affects the change of light and color.
The bluer the light is, the higher the color temperature is; the redder the color temperature is. In the middle of the day, the light color also changes with time: 40 minutes after sunrise, the light color is yellow, the color temperature is about 3,000 K; at noon, the sun is white, rising to 4,800-5,800 K; at noon on cloudy day, it is about 6,500 K; before sunset, the light color is red, and the color temperature drops to about 2,200 K. Because the correlation color temperature is in fact close to the light color of the light source by blackbody radiation, the evaluation value of the light color performance of the light source is not an accurate color contrast, so the two light sources with the same color temperature may still have some differences in the appearance of the light color. It is impossible to know the color rendering ability of the light source or the degree of color reproduction under the light source only by the color temperature.
Light source color temperature is different, light color is also different, color temperature below 3300 K has a stable atmosphere, warm feeling; color temperature at 3000-5000K for the intermediate color temperature, there is a refreshing feeling; color temperature above 5000K has a cold feeling, different light sources of different colors constitute the best environment.
Above is the basic knowledge of LED color temperature. Do you understand it?
So when choosing the color temperature, you’d better choose the appropriate color temperature according to the specific site, not too low or too high, so as to achieve better results. If you still confuse about the LED flood light CCT choosing, plz send an eamail to [email protected], will provide you with professional suggestions.
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