Xenon
Xenon headlights emerged in the 1990s as an advancement over halogen technology. Xenon bulbs contain ionized xenon gas that produces illumination when electrified, unlike halogen filaments. While costlier than halogens, xenon headlights have become common high-end options on vehicles from luxury makes like BMW and Audi. For regular nighttime drivers, they offer nice gains in visibility and convenience.
