As the Kelvin range increases, the light becomes less efficient. At 10000K plus, the light becomes so blue that it starts to scatter before it hits the road, and it does not project far enough to really help the driver see either. While higher saturations look good and are ideal for cosmetic lighting, these HID bulb colors are not good from a functional point of view. The blue headlights in the HID color chart might look cool but don’t work well for actually seeing the road at night.