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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.
A generally hardy fish, resembles the orchid dottyback, in that the body is a solid purple (sometimes pink), but is missing the black line/marking through the eye characteristic of orchids. This fish semi-aggressive in a home aquarium. 6 cm (2.4 in) Twolined dottyback: Pseudochromis bitaeniatus: May eat shrimps [49]: 101 6.9 cm (2.7 in)
The Essex Reef Light or Essex Reef Post Light, also known as Hayden's Point Light, was a light in Essex, Connecticut on the Connecticut River. [1] [2] The 21-foot (6.4 m) wooden tower was erected in 1889 and replaced with a skeleton tower by 1919. The skeleton tower was further altered to an automatic gas light a few years prior to 1931.
The lighthouse was added to the National Register of Historic Places as Penfield Reef Lighthouse in 1990. [ 1 ] [ 12 ] In 2015, the Coast Guard executed a substantial rehabilitation project at the lighthouse, designed by architect Marsha Levy of the Coast Guard's Civil Engineering Unit Providence, to address the damage from Hurricane Sandy.
Diagram of a high-pressure sodium lamp A high-pressure sodium lamp, Philips Master SDW-T 100W. Various types of chemistry are used in the arc tubes of HID lamps, depending on the desired characteristics of light intensity, correlated color temperature, color rendering index (CRI), energy efficiency, and lifespan.
The reef lights were intended to mark local hazards and did not need to be visible for as far as the reef lights that were erected near the Keys during the 19th century. [ a ] By the time the lights in this list were erected, older lighthouses were being automated, and these new lights were designed to be automated from the start.
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