Bulbs provide vehicular illumination for signaling, visibility, and interior function. These components are implemented in headlamps, tail lamps, turn signals, and interior lighting fixtures. Filament, halogen, LED, and Xenon technologies are commonly employed, each differing in luminous efficacy, color temperature, and operational lifespan. Electrical characteristics—wattage, voltage, and amperage—must match vehicle specifications to prevent system damage. Bulb base types, such as bayonet, wedge, and twist-lock, ensure correct fitment and electrical connection within designated sockets. Modern bulbs increasingly incorporate features like focused beam patterns and optimized thermal management for enhanced performance and longevity.