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A light pillar or ice pillar is an atmospheric optical phenomenon in which a vertical beam of light appears to extend above and/or below a light source. The effect is created by the reflection of light from tiny ice crystals that are suspended in the atmosphere or that compose high-altitude clouds (e.g. cirrostratus or cirrus clouds). [1]
The Spire of Dublin, alternatively titled the Millennium Spire or the Monument of Light [3] (Irish: An Túr Solais), [4] is a large, stainless steel, pin-like monument 120 metres (390 ft) in height, [5] located on the site of the former Nelson's Pillar (and prior to that a statue of William Blakeney) on O'Connell Street, the main thoroughfare of Dublin, Ireland.
[2] [3] An account of the monastical church of Durham, written in 1593, says " Also there is standinge in the south pillar of the Quire doore of the Lanthorne, in a corner of the said pillar, a four-squared STONN, which hath been finely wrought, in every square a large fine Image, whereon did stand a four- square stone above that, which had ...
High-pressure sodium (HPS) lamps have been widely used in industrial lighting, especially in large manufacturing facilities, and are commonly used as plant grow lights. They contain mercury. [24] They have also been widely used for outdoor area lighting, such as on roadways, parking lots, and security areas.
A light pillar, or sun pillar, appears as a vertical pillar or column of light rising from the Sun near sunset or sunrise, though it can appear below the Sun, particularly if the observer is at a high elevation or altitude. Hexagonal plate- and column-shaped ice crystals cause the phenomenon.
The Bailong Elevator, 2009. The Bailong Elevator (Chinese: 百龙电梯; literally Hundred Dragons Elevator) is a glass double-deck elevator built onto the side of a cliff in the Wulingyuan area of Zhangjiajie, China, an area noted for more than 3,000 quartzite sandstone pillars and peaks across most of the site, many over 200 metres (660 ft) in height.
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