The color temperature of the light source:
The absolute temperature of a complete radiator that is equal or close to the color temperature of the light source is used to describe the color table of the light source (the color seen when the human eye directly observes the light source), which is also called the color temperature of the light source. The color temperature is expressed by the absolute temperature K. Different color temperatures can cause people to react differently in emotions. We generally divide the color temperature of light sources into three categories:
The color temperature of warm color light is below 3300K. The warm color light is similar to the incandescent light color, and the red light component is more, giving people a warm, healthy and comfortable feeling. It is suitable for homes, houses, dormitories, hospitals, hotels, etc., or temperature. Lower place.
Warm white light
Also called the intermediate color, its color temperature is between 3300K-5300K. The warm white light is soft, which makes people feel happy, comfortable and serene. It is suitable for shops, hospitals, offices, restaurants, restaurants, waiting rooms and other places.
Also known as daylight color, its color temperature is above 5300K, the light source is close to natural light, has a bright feeling, makes people concentrate, suitable for office, conference room, classroom, drawing room, design room, library reading room, exhibition window, etc. place.
The degree to which the light source appears to the color of the object is called color rendering, that is, the degree of colorrealism. The light source with high color rendering performs better on color, and the color we see is closer to natural color, color rendering.
Low light sources perform poorly on color, and the color deviations we see are also large.
Why is there a color rendering? The key is the spectral characteristics of the light. The wavelength of visible light is in the range of 380 nm to 780 nm, which is the red, orange, yellow, green, blue, and blue we see in the spectrum. The range of purple light, if the proportion of the light contained in the light emitted by the light source is close to the natural light, the color seen by our eyes is more realistic.
We generally characterize color rendering by color rendering index. The standard color is set to 100 under the radiation of a standard light source. When the color scale is illuminated by the test light source, the degree of visual distortion of the color is the color rendering index of the light source. The larger the color rendering index, the less the distortion. Conversely, the larger the distortion, the smaller the color rendering index. The color rendering index requirements of the light source are different in different places. In the International Lighting Association, the color rendering index is generally divided into five categories:
*Category Ra Scope of application
* 1A >90 Art galleries, museums and printing industries and places
* 2B 80-90 Family, restaurants, high-grade textile crafts and similar industries
* 2 60-80 office, school, outdoor street lighting
* 3 40—60 Heavy industry factory, outdoor street lighting
* 4 20-40 Outdoor road lighting and some places where the requirements are not high