Best applications for mercury vapor lamps eye lighting. Energy consumption of an energysaving lamp compared to a mercury vapour lamp. There are two types of mercury vapor light bulbs sold in the. Once the lamp has warmed up and the mercury is fully vaporised, the discharge operates in unsaturated mercury.
Us20060152160a1 highpressure mercury vapor discharge. A high pressure, mercuryvapor hpmv discharge lamp of the additive type having a discharge sustaining filling which includes between 0. Mercury vapor lamps feature low initial cost, but have higher operating costs than hps or metal halide due to its lower efficiency. The luminous efficacy of any discharge lamp falls as wattage is reduced. For the first time it combines a very high pressure mercury discharge lamp with extremely short and. This lamp can cause unwanted interference to the smartgrid network or. It is interesting to notice that mercury vapor and high. Light sources incandescent lamp discharge lamp florescent lamp sodium lamp high pressure mercury vapour lamp 3. High pressure sodium bulbs to mercury vapor conversion light bulbs genesis lamp offers a wide selection of hid high intensity discharge light bulbs, including. Ep0215524b1 highpressure mercury vapour discharge lamp.
A fluorescent lamp tube is filled with a gas containing low pressure mercury vapor and argon, xenon, neon, or krypton. Mercury vapour lamps dealing with breakages some items of laboratory equipment contain mercury vapour lamps to generate uv light. Browse the mercury vapor standard products and find the product that you are looking for by using the. This gives a typical diffuse mediumpressure uv spectrum see figure. Mercury vapor lamps are becoming obsolete due to the higher efficiency and better. The reason for the creation of this second category of mercury lamp was to allow the efficacy to be maintained as high as possible for low wattage sources. From street lighting to parking lots, major portions of our infrastructure depend on this century old lighting technology. Mercury vapor is the original and now the oldest hid technology and has been supplanted by other hid types that offer higher efficiencies and better color properties. About 74% of these are mercury lamps, 2% are ultraviolet lamps, and 4% are high pressure sodium lamps. Ultraviolet light an overview sciencedirect topics. A sodiumvapor lamp is a gasdischarge lamp that uses sodium in an excited state to produce light at a characteristic wavelength near 589 nm two varieties of such lamps exist. A mercury vapour lamp is a highpressure electric arc discharge lamp that provides intense illumination over a selected range of wavelengths. The lamps can be constructed to emit primarily in the uva around 400 nm or uvc around 250 nm. Designed by experienced engineers, and by using quality material in combination with a tightly controlled manufacturing process, we provide high quality lamps free of impurities to maintain strong and stable output throughout life of the lamp.
After the experiment, leave the highpressure mercury vapour. High pressure mercury vapour lamp with elliptical bulb, coated, base e27. Find details of companies offering mercury vapour lamps at best price. Phosphors for high pressure mercury vapor lamp hpmv lamp. Pdf single electronic ballast for hps and hpmv lamp testing. High output another low pressure mercury lamp option is our standard and highoutput ho uvc lamps that use mercury vapor to emit. Do not touch the body of the lamp after switching on. Mediumpressure lamps draw a much greater current than lowpressure lamps, leading to a rapid rise in the mercury vapor pressure. The phosphor improves the colour rendering properties and luminous efficacy. The internal surface of the outer elliptical bulb is coated with a phosphor which converts uv radiation from the discharge into light. The mercury vapor lamp is a high intensity discharge lamp. The common fluorescent lamp is actually a lowpressure. This is also standard practice in mercury lamps designed for use in colder atmospheres.
Such lamps generate an atmosphere of mercury vapour at high. Highpressure sodium lamps also known as hps lamps or hps lights are a type of sodium lamp that is widely used in industrial lighting and many public outdoor areas. High pressure sodium lamps lighting associates, inc. Highpressure mercury vapour discharge lamp having a discharge vessel of gastight radiation transmitting ceramic material, provided with a filling comprising a rare gas, mercury, sodium halide. Again transition of the electrons requires least amount of input energy from a colliding electron. The clear mercury bulb has a bluish green appearance and the deluxe white. The lamp is an improvement over the lps lamp in that it has more acceptable color with the great efficiency of the sodium lamp. High pressure mercury vapour lamps for general lighting. They operate at an internal pressure of around one atmosphere and require special. Mercury vapor lamps, recognizable by the bluish cast of their light, are the least efficient member of the high intensity discharge hid family.
Ep0215524a1 highpressure mercury vapour discharge lamp. For high pressure sodium lamps this will be after approximately 5. A mercuryvapor lamp is a gas discharge lamp that uses an electric arc through vaporized. During operation the body of the lamp will get hot so that there is a risk of getting burned. It uses an arc through vaporized mercury in a high pressure tube to create very bright light directly from its own arc. High pressure mercury vapor discharge lamp containing. The reason for the creation of this second category of mercury lamp was to allow the efficacy to be maintained as high as possible for low. Electric lamps part 07 operation of high pressure mercury vapour hpmv lamp inventor of mercury vapour hpmv lamp john thomas way london. In 1935 the modern, high pressure mercury vapor lamp was developed, which works by electrifying solid mercury, which then vaporizes in a high pressure. Mercury vapor lighting is the oldest hid technology.
A sodiumvapor lamp is a gasdischarge lamp that uses sodium in an excited state to produce light at a characteristic wavelength near 589 nm. Sont son high pressure sodium philips philips lighting. Pdf on mercury vapor lamps and their effect on the smartgrid plc. The spectrum added is that of a triphoshor fluorescent and that is a low pressure mercury vapor lamp. In case of fluorescent lamp the mercury vapour pressure is maintained at lower level such that 60% of the total input energy gets converted into 253. Browse the sont products and find the product that you are looking for by using the compare option. High pressure mercury lamps kolorlux standard 50w, 80w, 125w, 250w and 400w kolorlux deluxe 50w, 80w, 125w, 250w and 400w data sheet product information kolorlux mercury vapor lamps are often used due to their relative efficiency. Phosphor coated bulbs offer a better color rendering index than either high or low pressure sodium lamps. The inner surface of the lamp is coated with a fluorescent and often slightly phosphorescent coating made of varying blends of metallic and rareearth. Search the history of over 424 billion web pages on the internet.
Find out information about highpressure mercuryvapor lamp. The invention relates to a highpressure mercury vapor discharge lamp 1 with an envelope 2 made from high temperatureresistant material, which contains two electrodes 12, made from tungsten and a filling in a discharge space 14, which filling essentially consists of mercury, rare gas, and a halogen that is free in the operating condition. Mercuryvapor lamp an overview sciencedirect topics. Pdf on mercury vapor lamps and their effect on the smart. High pressure sodium lamps or hps lamps electrical4u. When a mercury vapor lamp is first turned on, it will produce a dark blue glow because only a small amount of the mercury is ionized and the gas pressure in the arc tube is very low, so much of the light is produced in the ultraviolet mercury bands. The fact that the high pressure mercury vapour lamp could be introduced successfully as a practical light source, is due to the favourable spectral light distribution, the high luminous efficiency. High pressure sodium lamp with clear tubular outer bulb philips. Measuring the pressure in ultrahighpressure mercury lamps.
Two centuries of electric light source innovations pdf. Low pressure mercury lamps have been manufactured in jelight company inc. The quartz glass arc tube transmits ultraviolet light and enables a phosphor coating to be used on the inside of the outer envelope. In order to promote public education and public safety, equal justice for all, a better informed citizenry, the rule of law, world trade and world peace, this legal document is hereby made available on a. In order to promote public education and public safety, equal justice for all, a better informed citizenry, the rule of law, world trade and world peace, this legal document is hereby made. Mercury vapour pressure is typically around ten atmospheres. In mediumpressure mercuryvapor lamps, the lines from 200600 nm are present. Mbf a high pressure mercury vapour discharge operates in a quartz arc tube. The mercury vapor raises the gas pressure and operating voltage, and the sodium vapor produces light when the pressure within the arc tube is sufficient. Ushio germicidal lamps are low pressure mercury arc lamps that emit radiation peaking at 253.
High pressure sodium lamp hps lamp the hps lamp is the most ubiquitous lamp for street lighting on the planet. Uv lowpressure lamps are available in various lengths, with various sockets and connections and in rod. Because they have a large installed base, there continues to be applications for replacement and retrofit lamps. As pressure increases the chance of multiple collisions gets increased. Highpressure mercuryvapor lamp definition lamp that produces light as a result of an electrical discharge, generated between two electrodes, in a. As the main arc strikes and the gas heats up and increases in pressure, the light shifts into the visible range and the high gas pressure. Spectrum on page not representative of mercury vapor lamp whoever added the visible spectrum to the right of the page, please consider replacing it with a high pressure mercury vapor spectrum. Hach replacement uv for toc analyzers, arc imaging, chromatography. This is different from fluorescents which use the mercury vapor arc to create a weaker light that mainly creates uv light to excite the phosphors.
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