The document discusses different types of lamps, including incandescent, halogen, fluorescent, compact fluorescent, LED, neon, high intensity discharge, and sodium vapor lamps. Incandescent lamps produce light through a heated filament, while halogen lamps have a halogen gas mixture that increases filament life. Fluorescent lamps use mercury vapor and phosphors to produce light, and compact fluorescents are smaller versions that fit in standard sockets. LEDs are semiconductor devices that emit light when electricity is applied. Neon lamps use neon gas at low temperatures to produce distinctive red light. High intensity discharge lamps contain gases and metals to produce bright light from an electric arc. Sodium vapor lamps specifically use sodium gas to produce light near