Incandescent Light Bulb

An incandescent light bulb, incandescent lamp or incandescent light globe is an electric light which produces light with a filament wire heated to a high temperature by an electric current passing through it, until it glows (see Incandescence). The hot filament is protected from oxidation with a glass bulb that is filled with inert gas (or evacuated). In a halogen lamp, filament evaporation is prevented by a chemical process that redeposits metal vapor onto the filament, extending its life. The light bulb is supplied with electrical current by feed-through terminals or wires embedded in the glass. Most bulbs are used in a socket which provides mechanical support and electrical connections.

Incandescent bulbs are manufactured in a wide range of sizes, light output, and voltage ratings, from 1.5 volts to about 300 volts. They require no external regulating equipment, have low manufacturing costs, and work equally well on either alternating current or direct current. As a result, the incandescent lamp is widely used in household and commercial lighting, for portable lighting such as table lamps, car headlamps, and flashlights, and for decorative and advertising lighting.

Incandescent bulbs are less efficient than several other modern types of light bulbs; most incandescent bulbs convert less than 5% of the energy they use into visible light (with the remaining energy being converted into heat). Some applications of the incandescent bulb deliberately use the heat generated by the filament. Such applications include incubators, brooding boxes for poultry, heat lights for reptile tanks, infrared heating for industrial heating and drying processes, and the Easy-Bake Oven toy. But waste heat can also significantly increase the energy required by a building's air conditioning system.

Because of their inefficiency, incandescent light bulbs are gradually being replaced in many applications by other types of electric lights, such as fluorescent lamps, compact fluorescent lamps (CFL), cold cathode fluorescent lamps (CCFL), high-intensity discharge lamps, and light-emitting diodes (LEDs). Some jurisdictions, such as the European Union, are in the process of phasing out the use of incandescent light bulbs by banning them with laws to force them being replaced with more energy-efficient lighting.

Read more about Incandescent Light BulbHistory of The Light Bulb, Tungsten Bulbs, Efficiency and Environmental Impact, Construction, Manufacturing, Filament, Electrical Characteristics, Light Output and Lifetime, Health Issues

Other articles related to "incandescent light bulb, incandescent, light, incandescents, bulb, bulbs":

Incandescent Light Bulb - Health Issues
... Some health problems are associated with incandescent lighting, but the European Commission Scientific Committee on Emerging and Newly Identified Health Risks (SCENIHR) in 2008 ... already suffer rare skin conditions that make them exceptionally sensitive to light ... fluorescent lamps constitute any higher risk than incandescent lamps ...
Flash - Light
... Argon flash, a single-use source of very short and extremely bright flashes of light Arc flash, an electrical explosion Lightning, a natural phenomenon Muzzle flash, the ...
Historical Theories About Light, in Chronological Order - Electromagnetic Theory As Explanation For All Types of Visible Light and All EM Radiation
... discovered that the plane of polarisation of linearly polarised light is rotated when the light rays travel along the magnetic field direction in the presence of a transparent dielectric, an effect now ... This was the first evidence that light was related to electromagnetism ... In 1846 he speculated that light might be some form of disturbance propagating along magnetic field lines ...
Philosophical Problems - Metaphysics - Counterfactuals
... a statement that follows this form "If Joseph Swan had not invented the modern incandescent light bulb, then someone else would have invented it anyway." People ... Swan, after all, did invent the modern incandescent light bulb, so how can the statement be true, if it is impossible to examine its correspondence to reality? (See correspondence theory of truth ... in the history of technology, the utility of artificial light, and the discovery of electricity may all provide evidence for a logically sound argument ...
Electric Light - Types - Incandescent Light Bulb - Halogen Lamp
... lamps are usually much smaller than standard incandescents, because for successful operation a bulb temperature over 200 °C is generally necessary ... For this reason, most have a bulb of fused silica (quartz), but sometimes aluminosilicate glass ... outer glass is a safety precaution, reducing UV emission and because halogen bulbs can occasionally explode during operation ...

Famous quotes containing the words bulb, incandescent and/or light:

    ... until the shopkeeper plants his boot in our eyes,
    and unties our bone and is finished with the case,
    and turns to the next customer, forgetting our face
    or how we knelt at the yellow bulb with sighs
    like moth wings for a short while in a small place.
    Anne Sexton (1928–1974)

    I waited alone, in the company of orchids, roses and violets who—like people waiting beside you, but to whom you are unknown—maintained a silence which their individuality of living things rendered more imposing and in their chilly manner received the heat from an incandescent coal fire, preciously placed behind a crystal glass, in a white marble tub where it dropped, from time to time, its dangerous rubies.
    Marcel Proust (1871–1922)

    In the early days of the world, the Almighty said to the first of our race “In the sweat of thy face shalt thou eat bread”; and since then, if we except the light and the air of heaven, no good thing has been, or can be enjoyed by us, without having first cost labour.
    Abraham Lincoln (1809–1865)