what is ballast
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What is a ballast? To put it simply, a ballast is the functional heart of a fluorescent or HID light source. Just as a heart regulates blood flow to your body, a ballast ensures that a lamp stays lit by managing the distribution of energy throughout the fixture.
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material ballast - any heavy material used to stabilize a ship or airship. material, stuff - the tangible substance that goes into the makeup of a physical object; coal is a hard black material; wheat is the stuff they use to make bread.
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Our Oceans, Seas and Coasts 1 Ballast water of freighters is a possible way of introducing non-indigenous species. 2  If a ship is not fully loaded, water is used to maintain the draft, stability and strength of the ship. 3  This ballast water is usually taken up locally in harbours during unloading or en route on rivers and oceans.on-indigenous species are species introduced outside their natural past or present range, which might survive and subsequently reproduce. These species are introduced in situations where exchange of people or goods takes place between countries and continents, by shipping for example.
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keel 1 (kil) n. 1. a central fore-and-aft structural member in the bottom of a ship's hull extending from the stem to the sternpost. 2. a ship; boat. 3. a part corresponding to a ship's keel in some other structure, as in a dirigible balloon.
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- A pigment is a material that changes the color of reflected or transmitted light as the result of wavelength-selective absorption. This physical process differs from fluorescence, phosphorescence, and other forms of luminescence, in which a material emits light.
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Ballast Cross section of a vessel with a single ballast tank at the bottom. Ballast is material that is used to provide stability to a vehicle or structure. Ballast, other than cargo, may be placed in a vehicle, often a ship or the gondola of a balloon or airship, to provide stability.
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Ballast Stones The bows are positioned to the south. The ballast continues all the way up to the stempost. Samples of the “Tortugas” ship’s ballast stones were examined visually by Dr. Stephen Pollock of the Department of Geosciences, University of Southern Maine, USA, followed by x-ray diffractometer analysis of six samples. The following rock forms were identified of which sandstone was the prevalent form within the hull.
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- Understanding Electronic Ballasts and LED Drivers and Their Impact on Photo Controls What are Electronic Ballasts? Ballasts limit the amount of current from supply line voltage, while maintaining the necessary electrical conditions for proper lamp start and operation. Ballasts vary in design complexity. Older, simplistic magnetic models minimally
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fluorescent fluorescent - emitting light during exposure to radiation from an external source. light - characterized by or emitting light; a room that is light when the shutters are open; the inside of the house was airy and light.
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Fluorescent lamp Inside the lamp end of a preheat bi-pin lamp. In this lamp the filament is surrounded by an oblong metal cathode shield, which helps reduce lamp end darkening. A fluorescent lamp or a fluorescent tube is a low pressure mercury-vapor gas-discharge lamp that uses fluorescence to produce visible light. An electric current in the gas excites mercury vapor which produces short-wave ultraviolet light that then causes a phosphor coating on the inside of the lamp to glow.
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Refining (December 2009). Refining (also perhaps called by the mathematical term affining) is the process of purification of a (1) substance or a (2) form.he term is broad, and may include more drastic transformations, such as the reduction of ore to metal (for which see Refining (metallurgy)). The refining of liquids is often accomplished by distillation or fractionation. Gases can be refined in this way as well, by being cooled and/or compressed until they liquefy.
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Lighting Glossary Luminaire. A complete lighting unit consisting of a lamp (or lamps), ballast (or ballasts) as required together with the parts designed to distribute the light, position and protect the lamps and connect them to the power supply. A luminaire is often referred to as a fixture.
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keel 1 1. a central fore-and-aft structural member in the bottom of a ship's hull extending from the stem to the sternpost. 2. a ship; boat. 3. a part corresponding to a ship's keel in some other structure, as in a dirigible balloon. 4. (cap.) the constellation Carina.
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- The fluorescent tube converts electrical energy into light. much more efficiently at high frequencies than at line. frequencies of 50 or 60Hz. Typical ballast frequencies are in. the range 40kHz to 150 kHz. When regulating the current the excess voltage is. dropped across the leakage inductance of the ballast with. minimal Watts loss as compared to the copper losses of. conventional ballast. Electronic ballasts are commonplace, reliable and efficient.
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Helm Meaning The name Helm is of German origin. The meaning of Helm is helmet. Helm is generally used as a boy's name. It consists of 4 letters and 1 syllable and is pronounced Helm.
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- What is coal? Coal is a fossil fuel and is the altered remains of prehistoric vegetation that originally accumulated in swamps and peat bogs. The energy we get from coal today comes from the energy that plants absorbed from the sun millions of years ago.
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High Intensity Discharge Ballasts Microprocessor controlled intelligence offers superior lamp performance and the flexibility for proprietary value-added functions. VS electronic HID ballasts cover your HID needs with products for Metal Halide Lamps ranging from 20 Watts to 150 Watts.
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Electrical ballast A familiar and widely used example is the inductive ballast used in fluorescent lamps, to limit the current through the tube, which would otherwise rise to destructive levels due to the tube's negative resistance characteristic. Ballasts vary in design complexity.
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Locomotive A locomotive or engine is  a rail transport vehicle that provides the motive power for a train. A locomotive has no payload capacity of its own, and its sole purpose is to move the train along the tracks. In contrast, some trains have self-propelled payload-carrying vehicles. These are not normally considered locomotives, and may be referred to as multiple units, motor coaches or railcars.
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Lighting Glossary of Terms The ratio of the ballast factor, specified as a percentage, to the ballast input power in watts. Ballast efficacy factor is only meaningful when used to compare ballasts operating the same type and number of lamps. Also called the ballast efficiency factor.
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Thread: What does a HID ballast do? In this mode, the voltage present across the lamp's terminals may be anywhere between 70-300V, depending on the lamp and application. A similar ballast is used for CCFL lighting found in LCD panel backlights (laptops, camcorders, digital cameras, and what have you) and some newer CCFL flashlights.
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Ballasts When it comes to lighting in commercial buildings, ballasts are an essential part of the picture. Ballasts limit the amount of current that enters the lights from power supplies. This protects the light bulbs or lighting tubes from the high levels of current that come from the electricity source. Without ballasts, fluorescent lamps in recessed lighting and track lighting would be destroyed by the standard current.
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Fluorescent lamp A typical 100 watt tungsten filament incandescent lamp may convert only 5% of its power input to visible white light (400–700 nm wavelength), whereas typical fluorescent lamps convert about 22% of the power input to visible white light. fluorescent lamp or a fluorescent tube is a low pressure mercury-vapor gas-discharge lamp that uses fluorescence to produce visible light. An electric current in the gas excites mercury vapor which produces short-wave ultraviolet light that then causes a phosphor coating on the inside of the bulb to glow.
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Airship An airship or dirigible balloon is a type of aerostat or lighter-than-air aircraft that can navigate through the air under its own power. Aerostats gain their lift from large gas bags filled with a lifting gas that is less dense than the surrounding air.
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Electronic Ballast Ballast Basics: For a lighting device based on electric gas discharge to work, the ionization of gas in the tube is necessary. This phenomenon takes place at a relatively high potential difference and/or temperature than the normal operating conditions of the lamp.
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- Because LED Tube Lights do not require ballast like fluorescent tube lights, the ballast must be removed or bypassed by rewiring.ecause LED Tube Lights do not require ballast like fluorescent tube lights, the ballast must be removed or bypassed by rewiring.
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Track (rail transport) The track on a railway or railroad, also known as the permanent way, is the structure consisting of the rails, fasteners, railroad ties (sleepers, British English) and ballast (or slab track), plus the underlying subgrade. It enables trains to move by providing a dependable surface for their wheels to roll upon.