Electric light
Electric light is a form of artificial light produced by electricity. It is a key technology in modern society, providing illumination for homes, businesses, and public spaces. Electric light is produced by a variety of devices, including incandescent light bulbs, fluorescent lamps, and LED lights.
History
The development of electric light began in the early 19th century with the invention of the arc lamp. This was followed by the incandescent light bulb, invented by Thomas Edison and Joseph Swan in the late 19th century. The 20th century saw the development of fluorescent lamps and LEDs, which are more energy-efficient than incandescent bulbs.
Types of Electric Light
There are several types of electric light, each with its own advantages and disadvantages.
Incandescent Light Bulbs
Incandescent light bulbs produce light by heating a filament wire to a high temperature until it glows. They are less energy-efficient than other types of electric light, but they produce a warm, natural light that many people find pleasing.
Fluorescent Lamps
Fluorescent lamps produce light by passing an electric current through a tube filled with a low-pressure mercury vapor. They are more energy-efficient than incandescent bulbs, but they can produce a harsh, unnatural light.
LED Lights
LED lights produce light by passing an electric current through a semiconductor. They are the most energy-efficient type of electric light and can produce a wide range of light colors.
Applications
Electric light is used in a wide range of applications, from home lighting to street lighting, and from commercial lighting to industrial lighting. It is also used in a variety of specialized applications, such as stage lighting, automotive lighting, and medical lighting.
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Contributors: Prab R. Tumpati, MD
