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While very useful to reef aquarium keepers, halide lighting also uses a lot of electricity (150-400 watts being common) and produces copious amounts of heat. Most reef keepers mount halide bulbs at least one foot above their tank and some, due to the lights' heat output have had to add chillers to keep aquarium water cool.
A reef aquarium or reef tank is a marine aquarium that prominently displays live corals and other marine invertebrates as well as fish that play a role in maintaining the tropical coral reef environment. A reef aquarium requires appropriately intense lighting, turbulent water movement, and more stable water chemistry than fish-only marine ...
A chase is an electrical application where strings of adjacent light bulbs cycle on and off frequently to give the illusion of lights moving along the string. With computerized lighting consoles, building chase sequences has become easier, while previously chases used mechanical means, such as a wheel with an electrified spindle which strikes electrical contacts for each circuit.
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It can be transcluded on pages by placing {{Light Chaser Animation Studios}} below the standard article appendices. Initial visibility This template's initial visibility currently defaults to autocollapse , meaning that if there is another collapsible item on the page (a navbox, sidebar , or table with the collapsible attribute ), it is hidden ...
reef-points Lengths of rope attached to a sail and used to tie up the part of a sail that is taken out of use when reefed. In older systems, such as square or gaff rigs, the reef points take some of the load on the sail and distribute it to the boltrope; with slab reefing, the reef-points just keep the sail fabric controlled in a tidy manner ...
The Poe Reef Light is part of what became a complex of 14 reef lights in Michigan waters, which was intended to help ships navigate through and around the shoals and hazards of the Great Lakes. [16] It is also "part of a series of a significant offshore light construction projects being undertaken in the Straits area in the late 1920s."
The first two unmanned lights in the Florida Keys, the Molasses Reef Light and the Pacific Reef Light, were built as square pyramidal towers to the same plan in 1921. The Hen and Chickens Shoal Light was the smallest of these lights, and the only one built as a triangular pyramidal tower.
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