What is the difference between normal white light and warm white light?

1. The biggest difference between them is: the color temperature is different.

2. True white light means: color temperature is about 6500K, also called (cold white) in English.

3. Warm white light means: color temperature is about 3000K, which is called warm white in English (similar to the light emitted by the most traditional incandescent bulbs in the past), but it is whiter, so it is called warm white light. Mostly used in bedrooms to create a warm atmosphere.

4. Performance of color temperature:

Extended information

(1) Color temperature is a unit of measurement that represents the color components contained in light. Theoretically, color temperature refers to the color of an absolute black body when it is heated from absolute zero (-273°C).

After the black body is heated. Gradually changes from black to red, to yellow, to white, and finally to blue light. When heated to a certain temperature. The spectral components of the light emitted by a black body. It is called the color temperature at this temperature, and the measurement unit is "K" (Kelvin).

(2) If the light emitted by a certain light source contains the same spectral component as the light emitted by a black body at a certain temperature. It is called a certain K color temperature. For example, the color of the light emitted by a 100 W light bulb is the same as the color of an absolute blackbody at 2527K. Then the color temperature of the light emitted by this light bulb is: 2527K + 273K = 2800K.

Color temperature is a temperature measurement method commonly used in the fields of physics and astronomy. The concept is based on a fictional black object that emits different colors of light when heated to different temperatures. The object appears as Different colors. Just like when an iron block is heated, it first turns red, then yellow, and finally white.

Different color temperatures of light sources bring different feelings. Under high color temperature light source. If the brightness is not high, it will give people a cold feeling; under the illumination of a low color temperature light source, if the brightness is too high, it will give people a stuffy feeling. The lower the color temperature, the warmer the tone (reddish); the higher the color temperature, the cooler the tone (bluish).

(3) Color temperature (colo(u)r temperature) is a characteristic of visible light that has important applications in photography, video, publishing and other fields. The color temperature of a light source is determined by comparing its color to a theoretical thermal blackbody radiator.

The Kelvin temperature of the thermal blackbody radiator when it matches the color of the light source is the color temperature of that light source, which is directly related to Planck's blackbody radiation law.

The color temperature of the light source is different, the color of the light is also different, and the feelings it brings are also different:

<3000K? Warm (reddish white) steady, warm

3000-5000K Middle (white)? Refreshing

>5000K Cool type (bluish white)? Cold

(4) Color temperature and brightness: Under high color temperature light source, such as Low brightness will give people a cold atmosphere; under the illumination of a low color temperature light source, excessive brightness will give people a stuffy feeling. Light

Contrast of light and color: If two light sources with very different light colors are used in the same space, the contrast will have a gradation effect. When the light and color contrast is large, the brightness gradation can be obtained while the light color can be obtained. Color levels.

Reference: Baidu Encyclopedia-Color Temperature