Childhood of Bulb- Light is a most useful gift from the electrical technology. In the today’s world electrical light or bulbs are most essential for our life to prevent the darkness. But this electrical light technology or bulb has a long journey for development. Now a days light bulbs are used every where like in street light, home, study lamp, office, industry, schools and much more places, so in short we say that without light our eye is blind. But
what is the history of light technology or bulb?
An electric light is a device that produces visible light by the flow of electric current or electron. In nature Sun and Moon gives us the natural lights but electric light is the most common form of artificial lighting and is essential to modern society because electricity is more important things for our life and electric light one of the most important thing, providing interior lighting for buildings and exterior light for evening and night time activities. In technical usage, a replaceable component that produces light from electricity is called a lamp. Compact lamps are commonly called light bulbs. For example, the incandescent light bulb. Lamps usually have a base made of ceramic, metal, glass or plastic, which secures the lamp in the socket of a light fixture. The electrical connection to the socket may be made with a screw-thread base, two metal pins, two metal caps or a bayonet cap.
The three main categories in recent world of electric lights are incandescent lamps, which produce light by a filament heated white-hot by electric current, gas-discharge lamps, which produce light by means of an electric arc through a gas, and LED lamps, which produce light by a flow of electrons across a band gap in a semiconductor.
Before electric lighting became common in the early 20th century, in ancient people used sunlight in day time and at night they used candles, gas lights, oil lamps, and fires. n 1802, Humphry Davy invented the first electric light. He experimented with electricity and invented an electric battery. When he connected wires to his battery and a piece of carbon, the carbon glowed, producing light. His invention was known as the Electric Arc lamp. And while it produced light, it didn’t produce it for long and was much too bright for practical use. Over the next seven decades, other inventors also created “light bulbs” but no designs emerged for commerical application. More notably, in 1840, British scientist Warren de la Rue enclosed a coiled platinum filament in a vacuum tube and passed an electric current through it. The design was based on the concept that the high melting point of platinum would allow it to operate at high temperatures and that the evacuated chamber would contain fewer gas molecules to react with the platinum, improving its longevity. Although an efficient design, the cost of the platinum made it impractical for commercial production. By the 1870s, Davy’s arc lamp had been successfully commercialized, and was used to light many public spaces. The development of a steadily glowing filament suitable for interior lighting took longer, but by the early twentieth century inventors had successfully developed options, replacing the arc light with incandescents.
The energy efficiency of electric lighting has increased radically since the first demonstration of arc lamps and the incandescent light bulb of the 19th century. Modern electric light sources come in a profusion of types and sizes adapted to myriad applications. Most modern electric lighting is powered by centrally generated electric power, but lighting may also be powered by mobile or standby electric generators or battery systems. Battery-powered light is often reserved for when and where stationary lights fail, often in the form of flashlights, electric lanterns, and in vehicles.
- 1906 – The General Electric Company were the first to patent a method of making tungsten filaments for use in incandescent lightbulbs. Edison himself had known tungsten would eventually prove to be the best choice for filaments in incandescent light bulbs, but in his day, the machinery needed to produce the wire in such a fine form was not available.
- 1910 – William David Coolidge of General Electric improved the process of manufacture to make the longest lasting tungsten filaments.
- 1920s – The first frosted lightbulb is produced and adjustable power beam bulbs for car headlamps, and neon lighting.
- 1930s – The thirties saw the invention of little one-time flashbulbs for photography, and the fluorescent tanning lamp.
- 1940s – The first ’soft light’ incandescent bulbs.
- 1950s – Quartz glass and halogen light bulb are produced
- 1980s – New low wattage metal halides are created
- 1990s – Long life bulbs and Compact Fluorescent bulbs make their debut.
Types of electric lighting include:
Incandescent light bulb,
Arc lampXenon arc lamp
Mercury-xenon arc lamp