What does the color matching of desk lamp 9800 mean?

It means color modulation. Color temperature is defined by absolute black body. When the radiation of an absolute blackbody is exactly the same as that of a light source in the visible region, the temperature of the blackbody is called the color temperature of the light source. Low color temperature light source is characterized by relatively more red radiation in energy distribution, which is usually called "warm light"; After the color temperature rises, the proportion of blue radiation in the energy distribution increases, which is usually called "cold light". The color temperature of some common light sources is: standard candle light is 1930K (Kelvin-day); Tungsten lamp 2760-2900K；; The fluorescent lamp is 6400 k; Flash 3800 k; At noon, the sunshine is 5000 k; Electronic flash 6000 k; The blue sky is 9800K k k.