A mercury arc lamp from a fluorescence microscope. A krypton long arc lamp (top) is shown above a xenon flashtube. The two lamps, used for laser pumping, are very different in the shape of the electrodes, in particular, the cathode (on the left).
An arc lamp or arc light is a lamp that produces light by an electric arc (also called a voltaic arc). Early arc lamps used in department stores were a concern because hot sparks would randomly fall to the floor, on people, or on merchandise. The lamp also produces UV-A, UV-B, and UV.
Arc lamps are used in applications requiring great brightness, as in searchlights, large film projectors, and floodlights. The term arc lamp is usually restricted to lamps with an air gap between consumable carbon electrodes, but fluorescent and other electric discharge lamps generate light from arcs in gas. An arc lamp is defined as a type of electric lamp that produces light by creating an arc between two electrodes when electrical energy is supplied.
Sir Humphry Davy invented the first arc lamp in the early 1800s using carbon electrodes. This arc was created in the air and was used in searchlights and high. Why Arc Lamps Still Matter Today While modern lighting technology continues to evolve, arc lamps remain relevant in specialized applications and design focused interiors.
Their intense brightness, historical significance, and distinctive form keep them in use across industries and homes. Arc lamps are cheaper than other street lamps, oil lamps, and gas discharge lamps. Disadvantages of Arc Lamps The disadvantages of using arc lamps are listed below.
Explore the modern applications of arc lamps in 2025, transforming spaces with their unique design and functionality. This article explains Arc Lamp covering its definition, working principle (electric arc between electrodes), types, key characteristics, and historical/industrial applications. Arc lamp An arc lamp is an electric light that produces light by an arc of electrical current passing through ionized gas between two electrodes, oftentimes made of tungsten.
The gas within the bulb often consists of argon, metal halide, mercury, neon, sodium, or xenon. The fluorescent light is a commonly used arc lamp that is a type of mercury arc lamp whose bulb has been coated with phosphor. Metal Halide Lamps Metal halide lamps contain metal halides along with argon or xenon and mercury at high pressure to produce bright white light with high efficiency.
They are used in sports arenas, industrial buildings, and automotive headlamps. Arc Lamps for Laser Pumping Arc lamps are commonly used for pumping continuous.