HID is the upgraded lighting kits from the original halogen
bulbs, it’s getting more popular this few years, as most of the new car models
are all equipped with the HID Light Kits. High-intensity discharge (HID) lamps
are a type of electrical lamps which produce light by means of an electric arc
between tungsten electrodes housed inside a translucent or transparent fused
quartz or fused alumina tube.

Advantages for HID Lights :

- Greater output of light , can up to 3 times brighter than a halogen bulbs

- Cover almost 70% of the road , have a better vision when driving.

- Greater Durability, withstands a greater amount of vibrations and shocks.

- Greater bulb lift, can last up to 4-10 years or 3 times longer than a original
halogen

bulbs.

- Lesser power consumption, save up to 25%.

Color Temperature:

HID Color temperature refers to the degrees (K) , which simply the measures
of the color for the lighting output, like golden yellow, white, crystal white,
blue …

Degree (k) refers only to the color, while lumen refers to the lighting intensity.
So the higher the color temperature (degrees K) doesn’t mean a higher light
intensity (lumen). Here is the summary for the common color temperature on the
market --

3000K (Golden Yellow) , 4300K (Bright White), 5000K (white), 6000K (Crystal
White),8000K (Crystal Blue), 10000K (Aqua Blue), 12000K (Purple-Blue).

Bulb Size :

The common bulb size is H1, H3, H4, H7, h13, 9004, 9005, 9006, 9007, D1S, D2S.
And it has single beam conversion, hi lo kits, Telescope and Bixenon kits. Here
is the summary for the features and bulb sizes ranges for all those kits.

Single Beam Conversion Kits -- H1, H3, H4-1, H7, 9004-1, 9005, 9006, 9007-1,
with 2 ballasts and installation clamps.

Hi-lo Beam : H4-2, 9004-2. 9007-2 hid for low beam and halogen bulb for high
beam, with 2 ballasts and installation clamps.

Telescope Kit : H4-3, 9004-3, 9007-3, single HID can switch between high beam
and low beam, with 2 ballasts and installation clamps.

Bi-xenon Kit : H4-4, 9004-4, 9007-4, 2 HID bulbs on each bulb, which works for
high and low beam, with 4 ballasts and installation clamps.