The range can extend from about 1500K to 27000K or more, but for standard cinematography and photography use, we can stick to about 1800k to 7000k. White balance is the process of removing unrealistic color casts, so that objects which appear white in person are rendered white in your photo. Proper camera white balance has to take into account the "color temperature" of a light source, which refers to the relative warmth or coolness of white light.
Examples
Best image
Worst image
I think this is my best image because the white balance is correct and it is not too over exposed or too under exposed. There is also no one blocking the image and I took the picture very steadily so it is clear.
I think this is my worst image because the image is too under exposed because the lighting is too dark and also their is people in the picture and I think the image would be better if there was no one in it.