Lens: The transparent outer cover of the headlight, usually made of plastic or glass, which protects the internal elements and focuses the light beam. It may have a clear or slightly tinted surface.
Bulb or LED: The light source inside the headlight. Traditionally, this would be a halogen bulb, but many modern cars now use LED or HID (High-Intensity Discharge) bulbs, which are more energy-efficient and provide brighter, longer-lasting light.
Reflector: A reflective surface that directs the light emitted from the bulb into a specific pattern, ensuring optimal road illumination. The reflector can be made of polished metal or chrome.
Housing: The casing or enclosure that holds all the components of the headlight, including the lens, bulb, and reflector. It is typically made of durable plastic or metal to protect the internal parts from weather, dust, and impact.