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The History of the Light Bulb's Invention

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  1. Incandescent-lamp experiments before Edison

    Even before Edison, inventors such as Humphry Davy and Warren de la Rue experimented with incandescent lamps that produced light from electric current. In particular, Britain's Joseph Swan unveiled a carbon-filament bulb in 1878-79, conducting independent research around the same time as Edison.

  2. Edison completes a commercially viable bulb in 1879

    In 1879, Thomas Edison succeeded in creating a bulb that produced light for more than 40 hours by placing a carbonized cotton thread filament inside a vacuum glass globe. He then repeated experiments with various materials, including bamboo fiber, to extend filament life, eventually completing a practical commercial product.

  3. The Edison-Swan patent dispute and settlement

    In 1882, a British court recognized Swan's patent as prior, restricting Edison's bulb sales within the UK. Rather than continue litigation, the two companies chose to jointly dominate the British market by founding a joint venture in 1883, the Edison and Swan United Electric Light Company (Ediswan).

  4. Experiments surrounding filament materials

    Edison's research team is said to have tested thousands of materials, including bamboo, platinum, and carbonized cotton thread, in search of a practical filament material. Later, the development of the tungsten filament greatly improved bulb lifespan and brightness.

  5. How the light bulb changed homes and city nights

    Before the light bulb spread, homes relied on candles or gas lamps, but as bulbs became widespread, fire risk decreased and the hours people could safely stay active at night greatly increased. Edison completed electric lighting as an entire industry by building not just bulbs but power plants and distribution networks as well.

  6. Lighting technology's path to fluorescent lamps and LEDs

    By the mid-20th century, fluorescent lamps, which produced bright light using less power, had become widespread in offices and factories. Later, LED lighting using semiconductor technology emerged and rapidly replaced incandescent bulbs in terms of lifespan and energy efficiency.

Why the light bulb is special

The light bulb that turns on today with a simple flip of a switch is not the sudden idea of a single person, but the culmination of experimentation and competition among multiple inventors. Looking at the process by which the bulb became commercialized shows just how much trial and error a single invention went through before it changed the world.

Also check out the history of the telegraph's invention

Before inventing the light bulb, Edison worked as a telegraph operator, where he learned the techniques of handling electrical signals. If you're curious about other inventions that used electricity around the same period, take a look at our guide to the history of the telegraph's invention as well.

Frequently Asked Questions

Is it true that Edison invented the light bulb first in the world?

Not exactly. Even before Edison, several inventors, including Joseph Swan, were researching incandescent lamps, and Edison's real achievement lay in perfecting a practical bulb system that was both long-lasting and capable of mass production.

Is the light bulb still widely used today?

Household lighting has largely been replaced by energy-efficient LEDs, but the commercialization process and distribution-network experience created by the incandescent bulb are still considered an important starting point for the development of the lighting industry.