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Incandescents

An incandescent lamp is a device that produces light from electricity. Incandescent lamps create light by passing an electric current through a thin metal filament sealed in a glass or quartz bulb containing an inert gas. As current passes through the filament, it heats up until the filament is white hot and emits light. Although production of incandescent lamps has declined in recent years due to the availability of other more efficient sources of light such as LED and CFL lamps, they remain popular due to their low cost and simple technology.

Applications

Incandescent lamps are one of the most common light sources used in households, particularly for decorative lighting such as table lamps and chandeliers. The warm color produced by incandescent lamps is often preferred for living and dining rooms. They are also widely used in commercial settings and for outdoor lighting such as street lamps. Recently, the use of incandescent lamps for general lighting has become less preferred due to the development of energy efficient alternatives.

Working Principle

The working principle of incandescent lamps is relatively simple. A thin metal filament is sealed inside a glass or quartz bulb and is filled with an inert gas. When electric current is passed through the filament, the metal heats up and emits light. The type of filament and the gas inside the bulb can vary depending on the desired application. The temperature of the filament needs to be very high in order for the metal to glow brightly and sustain itself. To prevent the filament from burning out, the lamp is surrounded by a glass bulb which provides insulation, allowing the filament to heat up without burning out.

Neons

A neon lamp is a type of lamp that produces light by passing electric current through a tube that contains a gas. Neon lamps use a mixture of neon and other gases, such as argon and mercury vapor, which are excited by an electrical voltage applied externally and glow with different colors. They are often used for interior and exterior lighting as well as decorative lighting.

Applications

Neon lamps are mainly used for decorative lighting, such as in store signs and in advertising. They can also be used to accentuate design elements in architectural interiors. Neon lamps are also often used in outdoor lighting, such as on bridges and in public parks.

Working Principle

Neon lamps produce light by passing electric current through a sealed tube containing a mixture of gases, most commonly neon and argon. When voltage is applied externally, the gases become excited and emit light. The light produced is determined by the type of gas used in the tube and the voltage applied, as different gases emit light with different colors. The color of light produced can be modified by changing the type of gas used in the tube.

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