It refers to the color of light when the light is on, usually from 2700k to 7000k. The higher the color temperature, the more white it looks. The brighter it is, it is not. Then there are some professional English about color temperature, warm color is 2700k, daylight is 6400k, cool daylight is 6500k-6700k, and so on. The color temperature has nothing to do with the price of the lamp. But with the production, usually like 2700k, 6400k, 6500k and 6700k, more commonly used, the number of restrictions is not very strict, other, such as: 4100k and other color temperature, lamp suppliers have a certain number of requirements.
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