Lamps: History of Lighting

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Numerous olden age references had illuminated that lamps have been used to spread light, even before electricity was invented, and lighting was given a new meaning. The use of lamps can be broadly classified into two eras: The pre-electrical era and the post-electrical era.

Lamps: The Pre-electrical Era

The invention and first usage of the lamps can be dated back to 70,000 BC. At that time, there was no metal or bronze to make lamps; the civilization used hollow rocks and shells. These hollow rocks were filled with moss and other natural substances and soaked in animal fat. Animal fat acted as oil; this is how the first lamps ignited.

With the advent of pottery and the bronze and copper age, humans started to make lamps that imitated other natural shapes. Wicks came into existence much later and were used to control the flame or the burning rate. In the 7th century BC, Greeks started using terra cotta lamps, replacing handheld torches. The word lamp has been derived from the Greek word lampas, which means torch.

Lamps and the Design Change:

There was a significant change in the design of lamps in the 18th century when the central burner was invented. With the invention of the burner, a separate fuel source was made from metal. Another small change was the addition of a metal tube that could be adjusted to control the flame's intensity or light.

This was an important discovery in terms of lighting because with adjustment, humans could diminish the lighting or make it bright as required. Another aspect was added to the new lamp, which was in the form of small glass chimneys. The role of the glass chimney was to protect the flame and control the airflow.

Swiss chemist Ami Argand used the hollow circular wick in an oil lamp for the first time in 1783.

Fuels for Lighting

Different fuels have been used for lighting a lamp between 70,000 BC and now. Most of the early forms of energy were beeswax, olive oil, animal fat, fish oil, sesame oil, whale oil, and nut oil. These were also among the most commonly used forms of fuel for lighting a lamp till the late 18th century.

Around 1859, the first drilling process was initiated to find petroleum, and with the advent of kerosene, a derivative of oil, the lamps became more popular, and usage increased. Kerosene-enabled lighting was first introduced in Germany in 1853.

During the same time, two other products were used for lamp lighting: natural gas and coal. The first use of coal gas lamps was in 1784.

Electrical Lighting Lamps
Lamps have come a long way from using coal gas for electricity. In 1801, Sir Humphrey Davy of England invented the electric carbon arc lamp, the first of its kind. The working principle for this lamp was simple and included hooking two carbon rods to an electrical source.

The carbon rods were kept at a distance from each other so that electrical current could flow through the arc and thus vaporize carbon to create white lighting. Around 1857, A.E. Becquerel of France came out with the theory of fluorescent lighting in lamps. In the 1870s, the unthinkable happened with Thomas Edison invented the first electric incandescent lamp. Since then, incandescent lamps have been used for lighting purposes in homes till about the early 20th century.

In 1901, Peter Cooper Hewitt patented his new mercury vapor lamp. This arc lamp enhanced lighting using mercury vapors enclosed in a glass bulb. The Mercury vapor lamps set the prototype for fluorescent lighting lamps.

Georges Claude of France invented the Neon lamp in 1911, followed by Irving Langmuir, an American who invented the electric gas-filled incandescent lamp in 1915. In 1927, Hans Spanner, Friedrich Meyer, and Edmund Germer patented the first fluorescent lamp. The fluorescent lights provided better lighting than the mercury vapor lamps because they were coated inside with beryllium.

Since then, we have been using a different form of lighting in lamps, which includes Mercury vapors and incandescent lamps, and even today, in some corners of the earth, people still use the old wick and oil lamp for lighting their homes.