Post by
AlexN09 »
https://forums.nicoclub.com/alexn09-u185794.html
Wed Jan 23, 2013 6:47 pm
A projector housing will focus the light that your headlight produces down towards the payment. It creates a clear cutoff line so you avoid shining your lights into other cars and keeps the light on the road where you need it.
An HID (High Intensity Discharge) kit will come with a new bulb and a ballast. The ballast is a simple little box that is wired between your car's harness and the new lightbulb. It converts the 12VDC signal into a much higher voltage that can drive your new bulbs.
You're not just changing the color of the bulb with an HID kit, in fact you can get the same color bulb if you chose to. You're replacing the halogen bulb with a MUCH more efficient light source with a higher output. So you can see better, be safer, and take a little strain off of your electrical.
A quick guide on color choice:
You will often see the bulbs sold as 4300K, 6000K, 8000K, 10000K, or 43k, 6k, 8k, 10k. The K isn't actually referring to the number one thousand, but actually Kelvin temperature. The color of light is measured based on the color of steel as it is heated to these specific Kelvin temperatures. Theoretically, 10,000K is the color of the sun, or natural daylight.
In practice however, when you buy a bulb that says 10K it will look extremely blue. Most Manufacturers use 4300K bulbs and many hobbyists will use that or 6000K for a slightly blue hue.