Well-done have various color temperature:
from 3000K to 12000K, TB(sky blue), QB(green blue), ZB( deep blue), Pink, Purple etc.



Color Temperature is a measurement in Degrees Kelvin that indicates
the hue of a specific type of light source. Many people believe the misconception
that color temperature is a rating of the brightness of the bulb or HID kit.
This belief is completely false. The reality of the matter is that the higher the color
temperature, the less useable light output you will obtain. A perfect example would be a black light. This light has a color temperature of approx 12,000k and has almost no
useable light or lumens output. Higher K kits such as 7000k, 7500k, etc. have been
manufactured for individuals that are more concerned about the actual color output
of their lights as opposed to the actual useable light output they produce.

Chromaticity and Colour Temperature

XYZ trisimulus values and the associated Yxy colour space form the foundation of
the present system for numerical colour notation. The concept for the XYZ tristimulus values is based on the premise that all colours are seen as mixtures of these three
primary colours. By defining the colour matching functions of a standard observer,
the Commission Internationale de L'Eclairage (CIE), an international organization
concerned with light and colour, provided the basis for colorimetry in 1931.
The Tristimulus values XYZ are useful for specifying a colour, but the results
are not easily visualized. The two-dimensional colour (x,y) diagram is taken from
the Yxy colour space, in which Y is the lightness (and is identical to the tristimulus value
Y) and x and y are the chromaticity coordinates calculated from the tristimulus values
XYZ. The CIE x,y chromaticity diagram for this colour space is shown. In this diagram,
achromatic colours are toward the center of the diagram, and the chroma or saturation
increases toward the edges.