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Incandescent lamps, also known as light bulbs or bulbs, are the oldest form of electric lighting. They were invented in 1764 by Johann Wolfgang von Goethe, a German scientist. They are still one of the most commonly used lighting sources in homes and businesses today.The working principle of an incandescent lamp is simple. Inside the glass bulb is a small piece of tungsten wire, known as a filament. This wire is heated to a high temperature by an electric current passing through it. The heat causes the wire to emit visible light. This light provides illumination.The major application fields of incandescent lamps are in residential lighting, stage lighting, commercial lighting, and automotive lighting. In residential lighting, they are typically used for lighting rooms, hallways, and outdoor areas. On stages, they are used to create dramatic lighting. They are also often used in commercial applications, such as office buildings and stores. In automobiles, they are used to illuminate the interior of the car and the road outside.Neon lamps, also known as neon signs, are another form of electric lighting used in many different places. They were first developed in 1902 by a French chemist, Georges Claude. Unlike incandescent lamps, they do not use a filament to generate light, but instead use an electrical discharge through a gas-filled tube. This electrical discharge causes the gases to give off light in a variety of different colors.The major application fields for neon lamps are signs and advertisements. They are used extensively in storefronts and on billboards to advertise products and services. They are also often used for art installations and stage lighting. In addition, they are used in automobile lighting, particularly in the brake and tail lights.In conclusion, incandescent lamps and neon lamps are two forms of electric lighting with distinct working principles and application fields. Incandescent lamps use a tungsten filament heated by an electric current to produce light, while neon lamps use an electrical discharge through a gas-filled tube to produce light. They are each used in a variety of different ways, from residential lighting to stage lighting and advertising. Both incandescent lamps and neon lamps play an important role in modern lighting applications.

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