You have probably noticed automobiles with bluish headlights. These are usually aftermarket halogen bulbs or kits that have a very high color temperature. Automobile headlights become dim over time, so they should be replaced every few years even before they burn out. Installing aftermarket bulbs can help you see better because of a higher color temperature that produces a whiter light. They can be found at automotive stores and online. You can replace the bulbs yourself, or you can have a automotive professional replace them for you. OEM bulbs are available from an auto dealer and are usually a lower color temperature (3000K).