Xenon headlights, also known as HID (High-Intensity Discharge) headlights, use an electric arc to produce light. They are brighter than traditional halogen bulbs and provide better visibility at night. The light emitted is closer to natural daylight, which can reduce eye strain for drivers. These headlights are more energy-efficient and have a longer lifespan than halogen bulbs, lasting up to 2,000 hours. However, they can be more expensive to replace and may require a specific type of housing to fit properly in vehicles. Proper installation is essential for optimal performance and safety.