LED Light Bulbs Could Replace Incandescent Light Bulbs
Incandescent light bulbs have been losing ground to LED lighting solutions in recent years due to their inefficiency. But a team of physicists may have found an innovation that could give them a boost.
The first incandescent bulb was invented by Warren de la Rue who enclosed a coiled platinum filament inside an evacuated glass bulb. This worked but wasn’t commercially viable because of the high cost of platinum.
What is an Incandescent Light Bulb?
An incandescent light bulb uses electricity to heat a wire inside until it reaches high enough temperatures to produce visible light. This type of lamp is the one that most people are familiar with. It is the most common type of bulb used in homes today.
Its light is a lot like that produced by the sun and it can be quite pleasing, especially in rooms output speed sensor where ambiance and style are important. They also tend to work well with older-style dimmer switches.
The bulb has a glass enclosure that protects the filament from burning out. The filament is typically made from tungsten and it is heated until it glows. Some of the energy from the filament is converted into visible light. The rest is emitted as infrared radiation.
Incandescent light bulbs consume more electricity than other types of lighting. This is because more of the electrical power is lost as heat. This is why higher-wattage bulbs are often more expensive than lower-wattage ones.
As an alternative to traditional incandescent lamps, newer light emitting diode (LED) technology has been gaining popularity. LED bulbs do not have filaments, but instead consist of semi-conductive material that allows a current to pass through it, emitting light in the process. These bulbs are often cheaper and more efficient than incandescent lights, though they are not without their drawbacks.
The History of the Incandescent Light Bulb
The incandescent light bulb works by passing an electric current through a thin filament of metal. This heats the filament to a point where it begins to glow and emit light. The filament is contained within a glass enclosure, called a bulb, which prevents oxygen in the air from reaching it and destroying it. Without this glass covering and the vacuum it helps create, the filament would overheat and burn up in just a matter of minutes.
While Thomas Edison is credited with creating the first incandescent light bulb, a number of other inventors made significant improvements to the basic design. For example, in 1809 Humphrey Davy used a battery to pass an electric current through two strips of charcoal. This caused the carbon to glow, but the arc lamp was too costly for widespread use.
In 1904, European inventors Sandor Just and Franjo Hanaman patented a tungsten filament that lasted longer and emitted more light than carbon filaments. This improved the quality of incandescent lighting. Other improvements to the light bulb were made in the early and mid-1900s, including the discovery that placing an inert gas inside the bulb helped increase its efficiency.
Today, incandescent bulbs are still widely used to illuminate homes and businesses. But the incandescent light bulb has a number of drawbacks, including its high energy consumption and the fact that 90 percent of its electricity is lost as heat. This has led many countries to gradually phase out the incandescent light bulb and encourage the use of more efficient alternatives, such as LED and compact fluorescent lamps.
The Inventors of the Incandescent Light Bulb
The modern incandescent light bulb is one of the most common types of lights and has been in use with only minor modifications since its invention in the late 1800s. The bulb consists of a glass enclosure with a tungsten filament that is heated by electric current. Less than 5% of the electricity that powers the filament is converted into visible light; the rest is emitted as invisible infrared radiation.
In 1838, Humphry Davy passed current through a platinum strip and it lit up. This was a major step toward incandescent light bulbs but did not produce a stable, long-lasting design. The problem was that the material oxidized quickly and blackened, blocking light output. Other inventors tried using other materials such as iridium and carbon. However, they did not have the high melting point and low burning temperature of platinum to maintain a usable filament.
British physicist Joseph Wilson Swan invented a light bulb using carbonized paper filaments in an evacuated bulb in 1850. He used a pump to remove the air from the bulb which he realized was necessary for the filament to last. Swan patented his design in 1878.
Edison worked on a number of designs in his quest to develop the incandescent light bulb first practical incandescent light bulb. He experimented with hundreds of filament types, including a variety of metals such as platinum, gold, and silver. He also used different shapes and sizes of tubes to improve the bulb’s longevity. In 1905, Alexander Lodygin patented an incandescent light bulb using a tungsten filament. Improvements in production of tungsten wire in the 1910s enabled longer lasting tungsten filaments to be used.
The Development of the Incandescent Light Bulb
Incandescent bulbs work by sending electric current through a resistive filament. This creates heat, which then emits visible light. When it comes to lighting, the more heat a bulb generates, the brighter it will be. However, the problem is that this also consumes more energy, which leads to higher utility bills.
Humphry Davy invented the first electrical incandescent lamp in 1809. He connected two wires to a battery and placed a carbon strip between them. This strip glowed when the electric current ran through it, but it didn’t last long. In addition, his experiment used expensive platinum, which was impractical for wide use.
In 1875, Joseph Wilson Swan developed a more practical light bulb using carbonized paper filaments in an evacuated bulb. His version lasted hours, but still needed improvement. Several inventors tried to make incandescent lamps that were longer-lasting and more efficient.
Thomas Edison succeeded in creating a reliable (and therefore marketable) incandescent light bulb in 1879. His early bulbs lasted just a few hours, but later versions were able to last 600 hours.
Today’s standard incandescent light bulbs are made from a threaded metal base linked to a fine tungsten metal filament. This is coiled inside a glass bulb and usually filled with inert gas like nitrogen to reduce the risk of burning out the filament. These bulbs can be used with alternating or direct current, and are compatible with control devices like dimmers.