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An LED filament consists of multiple LED dice connected in series on a common longitudinal substrate that form a thin rod reminiscent of a traditional incandescent filament. These are being used as a low cost decorative alternative for traditional light bulbs that are being phased out in many countries. The filaments require a rather high voltage to light to nominal brightness, allowing them to work efficiently and simply with mains voltages. Often a simple rectifier and capacitive current limiting are employed to create a low-cost replacement for a traditional light bulb without the complexity of creating a low voltage, high current converter which is required by single die LEDs. Usually they are packaged in a sealed enclosure with a shape similar to lamps they were designed to replace (e.g. a bulb), and filled with inert nitrogen or carbon dioxide gas to remove heat efficiently.
How are LED filaments used?
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The answer: a low cost decorative alternative for traditional light bulbs

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Between the 5th and 8th centuries, new peoples and individuals filled the political void left by Roman centralised government. The Ostrogoths settled in Italy in the late 5th century under Theoderic (d. 526) and set up a kingdom marked by its co-operation between the Italians and the Ostrogoths, at least until the last years of Theodoric's reign. The Burgundians settled in Gaul, and after an earlier realm was destroyed by the Huns in 436 formed a new kingdom in the 440s. Between today's Geneva and Lyon, it grew to become the realm of Burgundy in the late 5th and early 6th centuries. In northern Gaul, the Franks and Britons set up small polities. The Frankish Kingdom was centred in north-eastern Gaul, and the first king of whom much is known is Childeric (d. 481).[G] Under Childeric's son Clovis (r. 509511), the Frankish kingdom expanded and converted to Christianity. Britons, related to the natives of Britannia modern-day Great Britain settled in what is now Brittany.[H] Other monarchies were established by the Visigoths in Iberia, the Suevi in north-western Iberia, and the Vandals in North Africa. In the 6th century, the Lombards settled in northern Italy, replacing the Ostrogothic kingdom with a grouping of duchies that occasionally selected a king to rule over them all. By the late 6th century this arrangement had been replaced by a permanent monarchy.
In what century did the Ostrogoths arrive in Italy?
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The answer: 5th

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After the American Revolutionary War broke out in 1776, the Connecticut colonial government ordered the construction of Black Rock Fort (to be built on top of an older 17th-century fort) to protect the port of New Haven. In 1779, during the Battle of New Haven, British soldiers captured Black Rock Fort and burned the barracks to the ground. The fort was reconstructed in 1807 by the federal government (on orders from the Thomas Jefferson administration), and rechristened Fort Nathan Hale, after the Revolutionary War hero who had lived in New Haven. The cannons of Fort Nathan Hale were successful in defying British war ships during the War of 1812. In 1863, during the Civil War, a second Fort Hale was built next to the original, complete with bomb-resistant bunkers and a moat, to defend the city should a Southern raid against New Haven be launched. The United States Congress deeded the site to the state in 1921, and all three versions of the fort have been restored. The site is now listed on the National Register of Historic Places and receives thousands of visitors each year.
Why exactly was the fort rename to Fort Nathan Hale?
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The answer: Revolutionary War hero

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Burke believed the Government was not taking the uprising seriously enough, a view reinforced by a letter he had received from the Prince Charles of France (S.A.R. le comte d'Artois), dated 23 October, requesting that he intercede on behalf of the royalists to the Government. Burke was forced to reply on 6 November: "I am not in His Majesty's Service; or at all consulted in his Affairs". Burke published his Remarks on the Policy of the Allies with Respect to France, begun in October, where he said: "I am sure every thing has shewn us that in this war with France, one Frenchman is worth twenty foreigners. La Vendee is a proof of this".
What country was Prince Charles part of the ruling family of?
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The answer:
France