COLOR TEMPERATURE, CCT, UNIT: KELVIN [K]
The Color temperatur is the specific color shown at a aprticular temperature . It is normally shown in unit of absolute temperature, Kelvin [K]. It is realted to Planck’s Law and Wien’s Displacement Law.
Higher color temperature (5,000 k or more)– > cool color (bluish white)
The middle color temperature (3,700 to 5,000 K)– > neutral color (nearly white)
The lower color temperature (2,600 to 3,700 K)– > warm color (yellowish white
The color temperature of a light source is the temperature of an ideal blackbody that emits light of comparable due to that light source. When the balckbody is heated enough and begins to emit light, it becomes dull red. WHen more heat is applied, it glows yellow, and then whte, and finally blue.
Like a piece of metal is heated, the color of light of the metal emitted will be changing in higher temperature.