Color temperature is the measure (in Kelvin) of a light's color when it is illuminated. As you may know, LED’s can come in three different color temperatures: Warm White, Daylight White, and Cool White. It is used to describe the ambience you are trying to create.
Warmer tones provide an ambient and intimate light that is ideal for living rooms, due to their more yellow tone.
Daylight white light provides a clean and neutral light that is ideal for kitchens because of their natural light tone.
Cooler tones provide a more vibrant white light that is ideal for commercial spaces. LED lights that fall within this range, emit an almost blue color.