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For devices such as table lamps and reading lamps, see Light fixture.
 A lamp, in technical usage, is a replaceable component such as an incandescent light bulb, which is designed to produce light from electricity. These components usually have a ceramic or metal base, which makes an electrical connection in the socket of a light fixture. This connection may be made with a threaded base, two metal pins, or a "bayonet mount." Re-lamping is the replacement of only the removable lamp in a light fixture. A chandelier light fixture A light fixture or luminaire is an electrical device used to create artificial light or illumination in architecture. ...
Image File history File links Download high resolution version (768x1276, 92 KB) Description: en: de: Glühlampe der Marke Neolux mit klarem Glaskolben. ...
Light bulb redirects here. ...
For other uses, see Light (disambiguation). ...
Electricity (from New Latin Ä“lectricus, amberlike) is a general term for a variety of phenomena resulting from the presence and flow of electric charge. ...
A chandelier light fixture A light fixture or luminaire is an electrical device used to create artificial light or illumination in architecture. ...
Types of lamp
Incandescent light bulb -
The incandescent light bulb was the first type of modern electric light, introduced in the early 19th Century. It is now being banned in some countries because it is inefficient at converting electricity to light. About 90% of the energy input is released as heat. This excess heat is then dumped into the air which, in warm climates, must then be cooled by ventilation or air conditioning, resulting in more energy consumption. However, in northern climates where heating and lighting is required during the cold and dark winter months, this technology can be considered efficient. Light bulb redirects here. ...
Most of the industrialized world is lit by electric lights, which are used both at night and to provide additional light during the daytime. ...
The term inefficiency has several meanings depending on the context in which its used: Economic inefficiency refers to a situation where we could be doing a better job, i. ...
Return inlet (left)Supply outlet (right). ...
Note: in the broadest sense, air conditioning can refer to any form of heating, ventilation, and air-conditioning. ...
Halogen lamps were introduced as an improvement to incandescent bulbs. Visible light output of these lamps is about 15% of the energy input, instead of 10%, allowing them to produce a total of about 50% more light using the same amount of electrical power. The bulb capsule is under high pressure instead of a vacuum or low-pressure noble gas. Good halogen bulbs produce a "cool white" color temperature approaching the appearance of sunlight at noon, while regular incandescent bulbs produce warm light with a warm yellow color temperature. Light bulb redirects here. ...
The word capsule (from the Latin capsula, a small box), has many similar meanings in English: In botany, a capsule is a type of dry fruit as in the poppy, iris, foxglove, etc. ...
This article is about pressure in the physical sciences. ...
Look up Vacuum in Wiktionary, the free dictionary. ...
This article is about the chemical series. ...
The CIE 1931 x,y chromaticity space, also showing the chromaticities of black-body light sources of various temperatures, and lines of constant correlated color temperature Color temperature is a characteristic of visible light that has important applications in photography, videography, publishing and other fields. ...
Prism splitting light High Resolution Solar Spectrum Sunlight in the broad sense is the total spectrum of the electromagnetic radiation given off by the Sun. ...
The CIE 1931 x,y chromaticity space, also showing the chromaticities of black-body light sources of various temperatures, and lines of constant correlated color temperature Color temperature is a characteristic of visible light that has important applications in photography, videography, publishing and other fields. ...
Halogen lamps are usually much smaller than standard incandescents and burn with a hotter filament temperature, which results in a very hot surface. For this reason, a fused-quartz "capsule" is used to enclose the filament, which is sealed behind an additional layer of glass. This is a safety precaution, because halogen "bulbs" can explode if broken while operating or by coming into contact with water or oily residue from fingerprints. The risk of burns or fire is also greater than other bulbs, leading to their prohibition in some places. Filaments surrounding a solar flare, caused by the interaction of the plasma in the Suns atmopshere with its magnetic field. ...
For other uses, see Temperature (disambiguation). ...
A macro shot of a palm and the base of several fingers; as seen here, debris can gather between the ridges. ...
Fluorescent lamp -
Fluorescent lamps have an efficiency of about 40%, meaning that for the same amount of light generated, they use ¼ the power and produce 1/6 the heat of a regular incandescent. Fluorescents were limited to linear and a round "circleline" lamp until the 1980s, when the compact fluorescent lamp (CFL) was invented. CFLs can have a built-in electrical ballast which fit into a standard screw base, or make use of a remote ballast. Compact and linear fluorescent lamps last far longer than incandescents, but do have some starting trouble in very cold weather when installed outside. Fluorescent lamps in Shinbashi, Tokyo, Japan Assorted types of fluorescent lamps. ...
A compact fluorescent lamp with an integrated electronic ballast A fluorescent lamp is a type of lamp that uses electricity to excite mercury vapor in argon or neon gas, producing short-wave ultraviolet light. ...
For other uses, see Linear (disambiguation). ...
Compact fluorescent light bulb A compact fluorescent light bulb (CFL bulb) is a type of fluorescent lamp which screws into a regular light bulb socket, or plugs into a small lighting fixture. ...
A ballast is a device used to start a gas discharge lamp, and, once the lamp is started, to limit the flow of electric current. ...
For the geological process, see Weathering or Erosion. ...
Fluorescents most often come in cool white (CW), with some home bulbs being a warm white (WW), which has a pinkish color. In between there is an "enhanced white" (EW), which is more neutral. There is also a very cold daylight white (DW). Compact fluorescent lamps are usually considered warm white, though many have a yellowish cast like an incandescent. "Warm" and "cool" are entirely relative terms and almost arbitrary so color temperature and the color rendering index (CRI) are used as absolute scales of color for fluorescents, and sometimes for other types of lighting. This article is about the color. ...
Arbitrary is a term given to choices and actions which are considered to be done not by means of any underlying principle or logic, but by whim or some decidedly illogical formula. ...
The CIE 1931 x,y chromaticity space, also showing the chromaticities of black-body light sources of various temperatures, and lines of constant correlated color temperature Color temperature is a characteristic of visible light that has important applications in photography, videography, publishing and other fields. ...
Colour rendering index, or CRI, is a measure of the quality of colour light, devised by the International Commission on Illumination (CIE). ...
HID lamp -
High-intensity discharge lighting first came about with the mercury-vapor streetlights, and later the high-pressure sodium ones with their characteristic orange color. Modern ones are metal halide, used in everything from headlights to floodlights, and with a more pleasant color balance. Like fluorescents, all HID bulbs require a ballast, but they also require a few minutes (or seconds for headlights) to warm up after "igniting". HID bulbs are over 60% and up to 80% efficient. Germicidal lamps are simple low pressure mercury vapor discharges in a fused quartz envelope. ...
High-intensity discharge (HID) lamps include the groups of lamps commonly known as mercury vapor, metal halide, and high-pressure sodium. ...
General Name, Symbol, Number mercury, Hg, 80 Chemical series transition metals Group, Period, Block 12, 6, d Appearance silvery Standard atomic weight 200. ...
This article is about the chemical use. ...
For sodium in the diet, see Edible salt. ...
See also Orange (disambiguation) for other meanings of the word. ...
Color is an important part of the visual arts. ...
Metal halide lamps are similar to mercury vapor lamps, but instead of just mercury, they also contain all metals in the halide group of the periodic table (Hence the name). ...
A SAAB headlight with combination projector/reflector optics A headlight or headlamp is a lamp, usually attached to the front of a vehicle such as a car, with the purpose of illuminating the road ahead during periods of low visibility, such as night or precipitation. ...
In photography and image processing, color balance (sometimes gray balance, neutral balance, or white balance) refers to the adjustment of the relative amounts of red, green, and blue primary colors in an image such that neutral colors are reproduced correctly. ...
LED lamp -
University researchers have made recent advances in the production of white light-emitting diodes (LEDs) which lead to the introduction of Solid State Lighting (SSL) fixtures made for general illumination. Before this time, colored LEDs were used as indicator lights for electronic devices. These lamps are still more expensive than other lamps, but they last an extremely long time, up to 100,000 hours (compared to around 10,000 for fluorescent and 1,000 for incandescent). It appears that for now these will be most useful and cost-effective in smaller applications, starting with nightlights and flashlights. Colored LEDs can also be used for accent lighting, and even in fake ice cubes for drinks at parties. They are also being increasingly used as Christmas lights. White LEDs are about the same efficiency as fluorescent lamps, while red ones can be up to 90% efficient. Solid State Lighting (SSL) refers to a type of lighting that utilizes light-emitting diodes (LEDs), organic light-emitting diodes (OLED), or polymer light-emitting diodes as sources of illumination rather than electrical filaments or gas. ...
Red, pure green, and blue LEDs. ...
In economics, cost-effectiveness refers to the comparison of the relative expenditure (costs) and outcomes (effects) associated with two or more courses of action. ...
Coleman lantern style nightlight A nightlight is a small, usually electrical, light source placed for comfort or convenience in indoor dark areas or areas that become dark at certain times. ...
For the Parliament song, see Flash Light (song). ...
OShea Jackson (born June 15, 1969 in South Central Los Angeles) better known by his stage name, Ice Cube, is an American rapper, actor and film director. ...
The word drink is primarily a verb, meaning to ingest liquids. ...
A party is a social gathering intended primarily for celebration and recreation. ...
Christmas lights (also sometimes called fairy lights, twinkle lights or holiday lights in the United States) are strands of electric lights used to decorate homes, public/commercial buildings and Christmas trees during the Christmas season. ...
LED technology is useful for lighting designers because of its low power consumption, low heat generation, instantaneous on/off control, continuity of color throughout the life of the diode and relatively low cost of manufacture. In the last few years, software has been developed to merge lighting and video by enabling lighting designers to stream video content to their LED fixtures, creating low resolution video walls.
Arc lamp -
An arc lamp consists of two electrodes which are separated by a gas, including neon, argon, xenon, sodium, metal halide, and mercury. Very high voltage is needed to "ignite" or "strike" the arc. This requires an electrical circuit sometimes called an "igniter", which is part of a larger circuit called the "ballast". After the arc is struck, the internal resistance of the lamp drops to a very low level that would allow an instantly-destructive high current to flow if the ballast were not present to limit it to the lamp's normal operating current. The ballast is typically designed to maintain safe operating conditions and constant light output over the life of the lamp. 15 kW Xenon short-arc lamp. ...
For other uses, see Electrode (disambiguation). ...
For other uses, see Neon (disambiguation). ...
General Name, symbol, number argon, Ar, 18 Chemical series noble gases Group, period, block 18, 3, p Appearance colorless Standard atomic weight 39. ...
General Name, Symbol, Number xenon, Xe, 54 Chemical series noble gases Group, Period, Block 18, 5, p Appearance colorless Standard atomic weight 131. ...
For sodium in the diet, see Edible salt. ...
Metal halide lamps are similar to mercury vapor lamps, but instead of just mercury, they also contain all metals in the halide group of the periodic table (Hence the name). ...
General Name, Symbol, Number mercury, Hg, 80 Chemical series transition metals Group, Period, Block 12, 6, d Appearance silvery Standard atomic weight 200. ...
A ballast is a device used to start a gas discharge lamp, and, once the lamp is started, to limit the flow of electric current. ...
Lamp circuit symbols In circuit diagrams lamps usually are shown as symbols. For example, an electrician would not want to have to keep on drawing out light bulbs so symbols are used instead. There are two main types of symbols, these are: The X in a circle, which usually represents a bulb not to be mixed up with an L.E.D. Image File history File links Lamp_symbol. ...
The semi-circled dent in a circle, which usually represents standard filament lamps.
Image File history File links Lamp_symbol,_old. ...
See also Image File history File links Nuvola_apps_ksim. ...
A Common Household Light bulb This is a list of sources of light, including both natural and artificial sources, and both processes and devices. ...
External links, references, resources - The Secret Life of Machines: The Electric Light (video)
- The Great Internet Light Bulb Book
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