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In 1954, the energy power was converted to acetylene gas and in 1976 the lighthouse was electrified, although gas was still used for the light until 1983. In 1992, the Ponta do Altar lighthouse was automated, using a system supplied by the Gisman company, being then controlled by the Lighthouse of Cabo de São Vicente near Sagres. In 2001, the ...
Light fixtures may also have other features, such as reflectors for directing the light, an aperture (with or without a lens), an outer shell or housing for lamp alignment and protection, an electrical ballast or power supply, and a shade to diffuse the light or direct it towards a workspace (e.g., a desk lamp).
A lantern is a source of lighting, often portable. It typically features a protective enclosure for the light source – historically usually a candle, a wick in oil, or a thermoluminescent mesh, and often a battery-powered light in modern times – to make it easier to carry and hang up, and make it more reliable outdoors or in drafty interiors.
The light source was an oil lamp and the range was 18 nautical miles. The 4th order lens was temporarily replaced during 1923 by a 6th order with a fixed white light. In 1952, the lighthouse was electrified with power from the public grid, and the oil lamp was replaced with an electric lamp, with an initial range of 15 nautical miles ...
The Penedo da Saudade lighthouse started operations on February 15, 1912. At that time it was equipped with a rotating 3rd–order optical device with a 500mm focal length and the light was fuelled by oil vapour. [2] [3] From March 1916 to December 1919 the light was extinguished due to World War I.
The light was installed on a slab positioned in front of one of the windows of the house, and, after its use, was moved into the interior of the room on a wooden carriage that rested on rails. This lighthouse went into operation on January 1, 1894, with a fixed oil light. In 1914, a sound signal was added, created by a tube of compressed air.
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