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A lantern is a source of lighting, often portable. It typically features a protective enclosure for the usually a candle, a oil lamp, or a thermoluminescent Gas mantle, and often a battery-powered light in modern timesto make it easier to carry and hang up, and make it more reliable outdoors or in drafty interiors. Lanterns may also be used for signaling, as flashlight, or as general light-sources outdoors.
Another important function was to reduce the risk of fire should a spark leap from the flame or the light be dropped. This was especially important below deck on ships: a fire on a wooden ship was a major catastrophe. Use of unguarded lights was taken so seriously that obligatory use of lanterns, rather than unprotected flames, below decks was written into one of the few known remaining examples of a pirate code, on pain of severe punishment.Article VI of Captain John Phillips's articles.
Lanterns may also be used for signaling. In naval operations, ships used lights to communicate at least as far back as the Middle Ages; (2025). 9781851097326, ABC-CLIO, Inc.. ISBN 9781851097326 the use of a Signal lamp to transmit a message dates to the mid-1800s. In railroad operations, lanterns have multiple uses. Permanent lanterns on poles are used to signal trains about the operational status of the track ahead, sometimes with in front of the light to signify stop, etc. Historically, a flagman at a level crossing used a lantern to stop cars and other vehicular traffic before a train arrived. Lanterns also provided a means to signal from train-to-train or from station-to-train.
A "dark lantern" was a candle lantern with a sliding shutter so that a space could be conveniently made dark without extinguishing the candle. For example, in the Sherlock Holmes story "The Red-Headed League", the detective and police make their way down to a bank vault by lantern light but then put a 'screen over that dark lantern' in order to wait in the dark for thieves to finish tunneling. This type of lantern could also preserve the light source for sudden use when needed.
Lanterns may be used in religious observances. In the Eastern Orthodox Church, lanterns are used in religious processions and liturgical entrances, usually coming before the processional cross. Lanterns are also used to transport the Holy Fire from the Church of the Holy Sepulchre on Great Saturday during Holy Week.
Lanterns are used in many Asian festivals. During the Ghost Festival, lotus shaped lanterns are set afloat in rivers and seas to symbolically guide the lost souls of forgotten ancestors to the afterlife. During the Lantern Festival, the displaying of many lanterns is still a common sight on the 15th day of the first lunar month throughout China. During other Chinese festivities, (sky lanterns) can be seen floating high into the air. However, some jurisdictions, such as in Canada, some states in the U.S., and parts of India, as well as some organizations, ban the use of sky lanterns because of concerns about fire and safety.
The term "lantern" can be used more generically to mean a light source, or the enclosure for a light source, even if it is not portable. Decorative lanterns exist in a wide range of designs. Some hang from buildings, such as enclosed in glass panes. Others are placed on or just above the ground; low-light varieties can function as decoration or landscape lighting and can be a variety of colors and sizes. The housing for the top lamp and lens section of a lighthouse may be called a lantern.
are made in societies around the world.
A lantern generally contains a burning light source: a candle, oil lamp with a wick, or gas with a Gas mantle. The ancient Chinese sometimes captured firefly in transparent or semi-transparent containers and used them as (short-term) lanterns, and use of fireflies in transparent containers was also a widespread practice in ancient India; however, since these were short-term solutions, the use of fire torches was more prevalent.
Modern varieties often place an electric light in a decorative glass case.
Beginning in the Middle Ages, middle eastern towns hired watchmen to patrol the streets at night, as a crime deterrent. Each watchman carried a lantern or oil lamp against the darkness. The practice continued up through at least the 18th century.
In March 1764 and twice in October 1764, George Allsopp, a British-born Canadian, was arrested in Quebec for violating an order to carry lanterns during the night. There was violence every time he was arrested and Allsopp would denounce the military. In October he prosecuted the soldiers involved in his arrests. On April 18, 1775, Paul Revere's midnight ride took place after two lanterns were held up in the Old North Church to signal to patriots in Charlestown that the British troops were crossing the Charles River to disarm the rebel colonial militias. The Battles of Lexington and Concord occurred the day after, on April 19, starting the American Revolution.
Public spaces became increasingly lit with lanterns in the 1500s, especially following the invention of lanterns with glass windows, which greatly improved the quantity of light. In 1588 the Parisian Parlement decreed that a torch be installed and lit at each intersection, and in 1594 the police changed this to lanterns. Beginning in 1667 during the reign of King Louis XIV, thousands of street lights were installed in Parisian streets and intersections. Under this system, streets were lit with lanterns suspended apart on a cord over the middle of the street at a height of ; as an English visitor described in 1698, 'The streets are lit all winter and even during the full moon!' In London, a Diary wrote in 1712 that ‘All the way, quite through Hyde Park to the Queen's Palace at Kensington, lanterns were placed for illuminating the roads on dark nights.’
Simple wick lanterns remain available. They are cheap and durable and usually can provide enough light for reading. They require periodic trimming of the wick and regular cleaning of soot from the inside of the glass chimney.
Mantle lanterns use a woven ceramic impregnated gas mantle to accept and re-radiate heat as visible light from a flame. The mantle does not burn (but the cloth matrix carrying the ceramic must be "burned out" with a match prior to its first use). When heated by the operating flame the mantle becomes Incandescence and glows brightly. The heat may be provided by a gas, by kerosene, or by a pressurized liquid such as "white gas", which is essentially naphtha. For protection from the high temperatures produced and to stabilize the airflow, a cylindrical glass shield called the globe or chimney is placed around the mantle.
Manually pressurized lanterns using white gas (also marketed as Coleman fuel or "Camp Fuel") are manufactured by the Coleman Company in one and two-mantle models. Some models are dual fuel and can also use gasoline. These are being supplanted by a battery-powered fluorescent lamp and LED models, which are safer in the hands of young people and inside tents. Liquid fuel lanterns remain popular where the fuel is easily obtained and in common use.
Many portable mantle-type fuel lanterns now use fuel gases that become liquid when compressed, such as propane, either alone or combined with butane. Such lamps usually use a small disposable steel container to provide the fuel. The ability to refuel without liquid fuel handling increases safety. Additional fuel supplies for such lamps have an indefinite shelf life if the containers are protected from moisture (which can cause corrosion of the container) and excess heat.
===Paper lanterns===
===Exterior lighting===
Raise the Red Lantern, a 1991 Chinese film, prominently features lanterns as a motif.
"The Tell-Tale Heart", a short story by Edgar Allan Poe, features the use of a dark lantern by the protagonist to shine a single ray of light on his victim's eye.
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