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A 3-way lamp, also known as a tri-light, is a lamp that uses a 3-way light bulb to produce three levels of light in a low-medium-high configuration. A 3-way lamp requires a 3-way bulb and socket, and a 3-way switch. In 3-way incandescent light bulbs, each of the filaments operates at full voltage. Lamp bulbs with dual carbon filaments were ...
A Roman hanging lamp or chandelier. Hanging lighting devices, some described as chandeliers, were known since ancient times, and circular ceramic lamps with multiple points for wicks or candles were used in the Roman period. [11] [12] The Roman terms lychnuchus or lychnus, however, can refer to candlestick, floor lamps, candelabra, or ...
[1] [3] Lamplighters were responsible for igniting the lamps and maintaining them. [3] As early as the 1750s, inventor Benjamin Franklin of Philadelphia introduced innovations in oil lamp design, such as using two woven wicks to siphon oil from a reservoir, and flat panes of glass which could be easily replaced and were cheaper than blown glass ...
Permanent light fixtures, such as dining room chandeliers, may have no switch on the fixture itself, but rely on a wall switch. Fixtures require an electrical connection to a power source, typically AC mains power, but some run on battery power for camping or emergency lights. Permanent lighting fixtures are directly wired.
Wrought iron is a form of commercial iron containing less than 0.10% of carbon, less than 0.25% of impurities total of sulfur, phosphorus, silicon and manganese, and less than 2% slag by weight. [18] [19] Wrought iron is redshort or hot short if it contains sulfur in excess quantity. It has sufficient tenacity when cold, but cracks when bent or ...
The Hezilo chandelier is composed of a circular hoop which is 6 metres (20 ft) in diameter. The hoop is made of gilt copper and bears Latin inscriptions on the upper and lower edges. Between the inscriptions are three horizontal bands, with the middle band bulging outwards, which are richly decorated with openwork foliage.