It is the value that determines the color of the illumination of a light source. It is what will create the atmosphere in a room or in the garden and is expressed in degrees Kelvin(K).
Consider that the light of a completely clear sky normally oscillates between 10,000 and 20,000 K.
Color Warm White, or Warm White. Recommended for a relaxing atmosphere, intimate, warm, the light is orange-yellow. Degrees Kelvin < 3000 K
Color Neutral White, or White. Recommended for home environments or for a work space, the light is similar to natural light. Kelvin degrees 4000 < K < 5000
Colour Cool White, or Cool White. Recommended for intense lighting for example in a company room or for important lighting, the light is cold. Kelvin degrees > 6000 K
