You may be confused about which color to choose for your HID conversion kit. The color of the output is determined by the temperature. The lower the temperature (usually around 5000k or so) is the whitest and brightest. As you increase the temperature the color scales as well.

At 6000k you have a light blue, 8000k a deeper blue, 10,000k an starts to turn green, 12000k starts to turn to purple. I recommend anything between 4000k-8000k to look the best but also be extremely bright.

3000K Golden Yellow
3000K has an approximately 3200lm output, which is more than 3x the light output of traditional halogen light. 3000K emits GOLDEN YELLOW color and offers superior penetration power during adverse weather epically in dense fog. The applications of the 3000K kit aim more towards secondary lighting apparatus such as high beam and fog lights. The 3000K capsule is actually a 5000K capsule specially coated with a film that filters out all the wave lengths except the range of wave length which emits yellow. This is the color temperature that will catch all the attention on the road.
5000K Pure White
5000K has an approximately 3200lm output, which is more than 3x the light output of the traditional halogen light and is the color temperature with the most output. The light appears fairly white, and has light yellowish hue when reflected off the road identical to the OEM HID equipped vehicles. This color is for customers who are looking for pure performance while improving the looks of their headlights. It is ideal for customers who does a lot of back road or canyon driving and need the optimal visibility.
6000K Diamond White
6000K has an approximately 2800lm output, which is 3x the light output of the traditional halogen light and slightly less light output compared to the 5000K. Although it has a bit lesser light output, it emits pure white light with very slight and barely noticeable tint of blue and purple
8000K Iceberg Blue
8000K has an approximately 2550lm output, which is about 3x the light output of the traditional halogen light and slightly less light output compared to the 6000K. While it has a bit lesser light output, it emits bluer light than the 6000K
10000K Brilliant Blue
10000K has an approximately 2200lm output, which is more than 2x the light output of the traditional halogen light. 10000K produces a deep blue light output approaching violet and the blue is noticeably deeper than the 8000K.
12000K Exotic Violet/Purple
12000K has an approximately 2100lm output, which is more than 2x the light output of the traditional halogen light. This color temperature puts out a deep bluish violet light and is deeper colored than the 10000K. It is for customer who is looking for the most extreme and most exotic looking light output.
30000K Pink Violet
This color temperature put to a pinkish Violet, very attractive and separates you from the rest of the cars. Despite the high color temperature, it still put out more than 2x the light than the halogen you are currently running in your car