Headlights are essential components of vehicles, designed to illuminate the road ahead during low-light conditions, such as at night or in bad weather. They help drivers see obstacles, road signs, and other vehicles, enhancing safety on the road. Headlights typically use either halogen, LED, or xenon bulbs, each offering different levels of brightness and energy efficiency. Modern vehicles often feature adjustable headlights that can change direction based on the steering angle, improving visibility around curves. Additionally, many cars are equipped with automatic headlights that turn on or off based on ambient light conditions, providing convenience and ensuring optimal visibility at all times.