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LED's can be found in white temps most often, HID conversion offers choice of color (often referred as temp). Even halogen "White" bulbs can be found. Be prepared for the "you'll blind others" and "those are illegal, folks to crop up.
Technically they do not carry certified DOT markings.
If you go the LED route (I did), do some research, learn how a buld work with a reflector housing. Buy quality, install correctly and adjust accordingly.