Complete HID Kits- Multiple application sizes and kelvins

HID bulbs/ Halogen bulbs comparisons:

SYLVANIA X1010 installed on an Integra Type R.

Factory 4100K HID lights with 5400K Osram Sylvania X1010 HID fog/auxilary low beam lights installed on a Nissan Maxima.

5400K aka "6000K" HID/Xenon
41000K HID/Xenon (Factory OE color)
4000K Halogen Super White
3200K Halogen (Original Equipment)

Gold/yellow vs. All weather season Halogen bulbs

Halogen and HID comparison

Philips (Gold) bulb on the left and bulb balloon (yellow) on the right with 5400K Osram Sylvania X1010 HID fog/auxilary low beam lights installed on a 2001 Honda Civic.

Bulb Types:

Two types of Silverstars:
Sylvania (Bluecoated /Super white)
Osram (Clear bulb)

Types of headlight housings:
Want more info on different housings? 1 2

D2R and D2S sizes, note the differences in the groves and slots.

Beam patterns for OEM D2R (top) and D2S Philips Ultinon (bottom).