As we all know, observe the color can not be separated from the observation light box light source, no light no color. The knowledge of physics tells us that visible light is also an electromagnetic wave whose wavelength range is: 3900nm-7600nm (as shown below). Near the wavelength of 3900nm light is purple. Near the 7600nm wavelength of light is red. Less than 3900nm light called UV, the human eye. Generally see no more than 7600nm wavelength of light called infrared, the human eye is generally invisible. In the visible light between 3900nm and 7600nm, we introduce a physical concept that represents the luminous color of light - the color temperature. The color temperature of the light source is the color that appears when the light source emits light and the color that appears when an absolute blackbody is burned at high temperatures Consistent with the combustion temperature to define, its unit is the absolute temperature Kelvin "K". K value is higher, the colo...