The Timeline of Lamps- Part 2

Welcome to the part 2 of  “The Timeline of lamps” series where we go through the evolution of lamps 

If you didn’t read Part 1 – The Timeline of Lamps Part 1

After the invention of Edison’s First Carbon Threaded incandescent lamp the world witnessed a dramatical change to electric lamps. By the start of 1880s Edison’s company, the Edison Electric Light Company, begins mass production of incandescent lamps, making electric lighting more accessible to the public. 

During this time more efficient and also the last generation  tungsten was used to make filament of the incandescent lamp this further lead to the wide-spread use  of electrical lamps. It was widely used because of its ability to produce white light when hot.

 

By the start of 1900 The tungsten lamps were further experimented and in 1906 The American physicist William D. Coolidge invents the ductile tungsten filament which improved the  efficiency and longevity of the lamp 

The introduction of the gas filled tungsten lamps in the 1920’s The first gas filled lamps started to appear which reduces the vaporization and oxidation of the tungsten. There where also tungsten coiled lamps which could produce 16 Lumens/watt which was pretty impressive at that time. Later, In the 1950’s Halogen lamps which uses halogen gases to regenerate tungsten was widely used and it marked the end of filament bulbs !

The energy crisis bought by the incandescent lamp was high and in 1970 the world was in oil crisis at this time the American engineer Edward E hammer invented the CFLs which was 5 times better than incandescent lamp and needed 75% less energy and the cherry on top was that the CFLs could  produce different colours

During this time discharge lamps were also widely used it is an electrode fit on both sides of a glass tube in it the light is produced as the result of  the atoms which got excited when a high potential difference is applied when the atoms come back to its original state by attaining stability the energy in them is radiated as light. Arc lamp, Sodium vapor lamp are examples of discharge lamps

Last but not least LED’s. By the end of 1900’s LED was invented and replaced almost all other electric light sources. The invention of Red, Green and Blue LED’s led to the production of  different colour. LED which stands for Light Emitting Diode is a semiconductor which emits light when electricity passes through them. It works on the basis of electroluminescence. In todays market LED is an essential commodity from house lights to underwater beam lights. The more advanced LED’s are used in different types of fields like Television and mobile screens but they are still in development. It is sure that we will see advancements in the near future .

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