What do 3000k and 6000k light bulbs mean?

The color temperature of LED lamps generally means that the colors of LED lamps are generally divided into warm white, 2000k~4500k, positive white, 4500 K ~ 6500k and cold white above 6500 K. LED is a light-emitting diode, a solid semiconductor that can convert electric energy into visible light, and it can directly convert electricity into light, and the wavelength of light is also the color of light, so a P-N junction is formed.