Lighting control systems automatically manage building lights. Sensors detect occupancy and daylight, controllers adjust brightness and color. Network protocols (DMX, KNX, Lutron) carry commands. Software interfaces let users create scenes and schedules. Modern systems integrate with building management (HVAC, security) for holistic control. Applications: office lighting (save energy by dimming during day), theaters (complex scenes for performances), retail (ambiance and energy), homes (smart home integration).