The inner surface of the lamp is coated with a fluorescent and often slightly phosphorescent coating made of varying blends of metallic and rareearth. Light in hpsv lamps is produced by passing electric current through sodium vapor under pressure at high temperature. The heat generated by the arc then vaporizes the mercury and sodium. Thus, tungstenhalogen lamps are made to operate at lower filament temperatures, with less lighting efficacy. Mercury vapor luminaire plates are shown for the purpose of removal only. Abstract high pressure sodium vapor lamps due to long service life high light, as the most comprehensive street lighting and industrial lighting whose use is increasing day by day. Low pressure sodium lamps were invented first in 1920. The alumina arc tube of a high pressure sodium arc discharge lamp contains a penning mixture gaseous filling and also has an encircling wire ring starting aid, in order to reduce lamp starting voltage. Low pressure sodium lamps lps lamps are normally made with a cylindrical or ushaped glass tube with a length of several centimeters.
The latest publications can be downloaded from the schneider electric internet web site. The mercury vapor raises the gas pressure and operating. Google has not performed a legal analysis and makes no representation. Electrodes 30a, 30b are positioned in the discharge vessel 20 and are each connected to a current supply conductor 40a, 40b which issues from the discharge vessel 20 at a respective end 21a.
Since the early 1970s, the high pressure sodium lamp, has become one of the most important light sources for outdoor lighting thanks to its high luminous efficacy about 140 lmw, good color rendering via its golden white color appearance and long lamp life 24,00032,000 h. Find brochures, pdfs, technical datasheets and rayfiles. A sodium vapor lamp is a gasdischarge lamp that uses sodium in an excited state to produce light at a characteristic wavelength near 589 nm. The sodium dline is the main source of light from the hps lamp, and it is extremely pressure broadened by the high sodium pressures in the lamp, hence colors of objects under them can be distinguished.
The xenon gas which is easily ionized, facilitates striking the arc when voltage is applied across the electrodes. Aug 07, 2016 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. Pdf modeling and checking the power quality of high pressure. Pdf modeling and checking the power quality of high. This temperature regulation results in less energy required to keep it lit. Low pressure sodium lamps are highly efficient electrical light sources, but their yellow light restricts applications to outdoor lighting, such as street lamps, where they are widely used.
Pdf the influence of high pressure sodium lamps on the power. The spectral output of low pressure sodium is also dominated by the sodium d line, but has very low cri. The first lamp with 400 w, 42000 initial lumens and 6000hour life first came in the market in 1965. Once inventory has been depleted however, any mercury vapor fixtures that require new ballasts will need to be replaced with sodium vapor fixtures. The sodium is mixed with other impurities to create a more white light. Highpressure sodium vapor lamps for open and enclosed. Sox low pressure sodium vapor philipssoxlow pressure sodium lamps bis33616. Comparative study of 250 w high pressure sodium lamp operating. Sodium vapour lamp free download as powerpoint presentation. The characteristics of the sodium lamp as influenced by vapor pressure. High pressure sodium hps hps fixtures are available in three wattages 70, 200, and 250. Introduction high pressure sodium hps lamps, a member of the high intensity discharge hid lamp family, are the most efficient white light source commercially available today.
High pressure sodium discharge lamp characterization for use as. Product information high pressure and specification. To check the quality of our lamps, its necessary to express the exact. Difference between sodium vapor lamp and mercury lamp. Reactions causing loss of sodium vapor in hps lamps. Any work will constitute replacement with the appropriate high pressure sodium hps or light emitting diode led fixture. Sodium vapour lamp incandescent light bulb equipment scribd. You can also choose from ce, ccc, and lvd sodium vapor lamp, as well as from 80, 100, and 70 sodium vapor lamp, and whether sodium vapor lamp is led, or incandescent bulbs.
High pressure sodium lamps are the most efficient artificial white light source with about 29% of the energy used by the lamp producing light. If the sodium vapor pressure in an hps lamp is increased by increasing the cool spot temperature, the separation. In this paper, a lowcost electronic ballast for highpressure sodium vapor lamps is presented. Download fulltext pdf download fulltext pdf read fulltext. 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. A sodium vapor lamp, also known as a gas discharge lamp, is a lamp that makes use of sodium to produce light. May 22, 20 home current affairs current affairs quiz general knowledge quiz ebooks download app hindi difference between sodium vapor lamp and mercury lamp published. This 150 watt bulb puts out a bright 16000 lumens of light. Please refer to the table on page 5, under upgrading existing streetlights, which shows the recommended mercury vapor to sodium vapor lamp wattage conversion. Aug 20, 2016 a fluorescent lamp tube is filled with a gas containing low pressure mercury vapor and argon, xenon, neon, or krypton. A sodiumvapor lamp is a gasdischarge lamp that uses sodium in an excited state to produce light at a characteristic wavelength near 589 nm. When a high pressure sodium lamp is to be disposed, it is subject to the current epa toxicity characteristic leaching procedure tclp disposal criteria. The first lamps had a removable outer jacket with a vacuum between glass to insulate the bulb to keep it hot enough to keep the sodium in vapor form.
Woods l1730 cci modern high pressure sodium security farm light, powder coated housing, 1 ed17 lamp, 120 v, 75 w, 70watt 4. A rather surprising feature of the high pressure sodium vapor lamps according to the invention is that efficiency in the. The construction and applications of sodium vapour lamps. Sodium retaining reservoirsprovide even distribution of sodium for 100% lumen maintenance, long lamp life and lamp wattage control. High pressure sodium lamp hps lamp the hps lamp is the most ubiquitous lamp for street lighting on the planet. Sodium vapor lamp manufacturers, suppliers, the sodium vapor lamps are generally a low pressure sodium vapor lamp has a high efficiency along with the lights you can also install surveillance patent us3248590 high pressure sodium vapor lamp the emission of the low pressure sodium vapor lamp is composed of sharp lines an envelope of high. The high pressure sodium vapor discharge lamp according to claim 1, in which said envelope has a heat resistant oxide layer coated on the outer sides of opposite ends thereof.
The sodium vapor lamps are classified into low pressure sodium vapor lamps and high pressure sodium vapor lamps. The high pressure sodium vapor discharge lamp according to claim 2, in which said heat resistant oxide layer is selected from the group consisting of alumina and. Comparative study of 250 w high pressure sodium lamp. Sodium vapor lamp simple english wikipedia, the free. The highpressure sodium lamp, invented some 25 years ago schmidt, 1961. Integrating the outer vacuum jacket as a bulb with the inner discharge tube inside, therefore eliminating the separate outer jacket and improving insulation properties. Lumen rating sylvania high pressure sodium lamps, with the exception of lumalux super and sox lamps, are based on burning cycles of at least 10 hours per start and ballasts which meet ansi standards. Soxe lamps are distinguished by the use of the black bases compared to the tan bases used on sox lamps. Han vinck department of electrical and electronic engineering institute for experimental mathematics science duisburgessen university university of johannesburg, p. Sodium vapor lamps market size, share, trends, analysis. Pdf reactions causing loss of sodium vapor in hps lamps. Sunlite 03635su lu150mog 150 watt high pressure sodium light bulb, mogul base e39, ansi code s55, 16000 lumen, 20000 life hours, clear, 2100k. The sodium present in pressure inside the arc tube is in the magnitude of 104 to 105 pa the arc tube can start a reaction with the discharge tube material to in the lamp, even at elevated temperatures of the operation form sodium balumina na2o 11al2o3, which compound 11001200 8c. Color highpressure sodium vapor lamp westinghouse electric.
Difference between sodium vapor lamp and mercury lamp gktoday. The results from the mainly contains a laminated transformer, where w igniters are high pressure sodium lamp with w electronic ballast are also usually added to the circuit see fig. High pressure sodium vapor lamps for open and enclosed luminaires reduce read more industrial installations car parks, courtyards buildings, monuments, bridges suitable for use in open and enclosed luminaires outdoor applications only in suitable luminaires. A high pressure sodium vapor discharge lamp of improved color including in combination a specified arc length to power input, a predetermined sodium to mercury amalgam ratio, heat shields surrounding each end of the arc tube and an improved end cap to arc tube seal, which combine to increase the sodium vapor pressure and provide a lamp of greatly improved color. High pressure sodium lamps or hps lamps electrical4u. High pressure sodium vapor lamps due to long service life high light, as the most comprehensive street lighting and industrial lighting whose use is increasing day by day. For thermal insulation purposes, they have an outer glass vacuum around the inner discharge tube. 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. Rp photonics encyclopedia sodium vapor lamps, lowpressure. High pressure sodium vapor lamp download pdf info publication number us3248590a. High pressure sodium hps lamps are the most efficient member of the hid family. Pdf low pressure sodium vapor lamp installation guide. High pressure sodium vapor lamps for open and enclosed luminaires reduce.
Therefore, check the power quality of these lamps becomes necessary. Hps lamps were developed and introduced in 1968 as energyefficient sources for exterior, security, and industrial lighting applications, and are particularly prevalent in street lighting applications. Us3900753a high pressure sodium vapor lamp having low. It produces light at a characteristic wavelength near 589 nm.
High pressure sodium vapor discharge lamps hitachi, ltd. The proposed ballast is a twostage circuit that requires only o. The high pressure sodium vapor discharge lamp according to claim 5 wherein the predetermined distance between said electrodes is 52 millimeters and. Pdf on mercury vapor lamps and their effect on the smart. The gas discharge principle of low pressure sodium lamps is similar to that of lowpressure. A high pressure sodium vapor discharge lamp according to claim 4 wherein said predetermined sodium mercury amalgam is 25 percent sodium by weight and said xenon gas is at a pressure of 20 torr. The high pressure sodium hps lamp is widely used for outdoor and industrial applications. Sunlite high pressure sodium lamps are a longlife replacement for your existing hid fixtures. Generally, the vapor pressure is lower and the starting gas is ionized more easily with this configuration than it is with convention probe start metal halide lamps. Sylvania brand high pressure sodium lamps, manufactured by ledvance, llc, are exempted from the requirements of the osha hazard communication standard 29 cfr 1910. Complete lowcost twostage electronic ballast for 70w high. High pressure sodium hps lamp the high pressure sodium hps lamp is widely used for outdoor and industrial applications. Please refer to the table on page 5, under upgrading existing streetlights, which shows the recommended mercury vapor to sodium vapor lamp.
Low pressure sodium vapor lamps are limited to only outdo lighting applications such as street lamps owing to their yellow light. Area lighting, industrial and people places ge iline multi vapor lamps pg 315. High pressure sodium lamps lighting associates, inc. These light sources, together with the high energy outdoor lamps, like the metal halide lamps, mercury vapor lamps and high pressure sodium lamps are unlikely to inject noise into the powerline. Factors affecting ballast and lamp life are also addressed along with a brief discussion on. A similar high pressure sodium vapor discharge lamp, such as described in conjunction with fig. Authority us united states prior art keywords sodium lamp pressure mercury millimeters prior art date 19630301 legal status the legal status is an assumption and is not a legal conclusion. Low pressure sodium lamps are highly efficient electrical light sources, but. Its higher efficacy makes it a better choice than metal halide for these applications, especially when good color rendering is not a priority.
It is still used where the ability to show different colors is not very important. Pdf the high pressure sodium lamp is a high energy outdoor light source that belongs to the high intensity discharge lamp family. Lithonia lighting f150sl 120 m6 1 lamp 150w high pressure sodium flood light, bronze. A high pressure sodium lamp includes discharge vessel 20 which is enclosed with intervening space 1 by an outer bulb 10, which space contains a gasfill with at least 70 mol. A wide variety of 250w high pressure sodium lamp options are available to you, such as lighting solutions service, certification, and bulb type. Modeling and checking the power quality of high pressure. Oct 01, 2018 after that the arc then heats up the mercury and the mercury vapor then lights, giving the lamp a bluish color. High pressure sodium vapor lamps due to long service life high light, as the most comprehensive street lighting and industrial.
The lamp is an improvement over the lps lamp in that it has more acceptable color with the great efficiency of the sodium lamp. Use our online configurators to find best system solutions and products. Pdf the influence of high pressure sodium lamps on the. Electric lamps part 05 notes is available in pressure sodium vapour lampthis lamp was invented first in 1920 by arthur h. One of the major drawbacks to these lamps is producing a lot of current harmonic. All high pressure sodium lamps contain some amount of mercury. The characteristics of the sodium lamp as influenced by. The following information is provided by ledvance, llc as a courtesy to its customers. This test is used to determine if an item can be managed as hazardous. High pressure sodium lamp long run 4y, elliptical bulb coated, base e40. Electrodes 30a, 30b are positioned in the discharge vessel 20 and are each connected to a current supply conductor 40a, 40b which issues from. High pressure sodium lamps nhr code type watts screw base glass dia.
The gas fill is vaporized when the gas attains operating. The mercury helps add a blue spectrum light to the pure yellow of the sodium. Sodium is the last material to vaporize as sodium vapor strikes an arc over 240 c. Inefficient sodium vapour lamps will therefore be discontinued as of april 2012. High pressure sodium standard noneco 35w 1050mg high pressure sodium eco 50400w 115mg high pressure sodium plus eco 30,000 hour noncycling works on standard ballasts 50400w high pressure sodium hgfree eco zero for all these reasons. A fundamental study on current industrial lighting systems by. Pdf high pressure sodium vapor lamps due to long service life high light, as the most comprehensive street lighting and industrial lighting. A sodium vapor lamp is a kind of gas discharge lamp.
The basic hid lamp technologies mercury vapor, highpressure sodium, and metal. Oct 25, 2020 in 1959, the development of polycrystalline alumina pca opened a new path to introduce the high pressure sodium vapor lamp, as this material is very rarely affected by high pressure and temperature sodium vapor. Professional factory high pressure sodium vapor lamp 70w 100w 150w 250w 400w w for street light. They are widely used on the streets for lighting purposes. There are 234 suppliers who sells sodium vapor lamp on, mainly located in asia.
The sodium is mixed with other impurities to create a. High pressure sodium lamps emit a greater spectrum of light, whereas low pressure sodium lamps can only emit monochromatic yellow light. Highlighting a dedication to quality and integrity, the sunlite product line includes compact fluorescent, linear fluorescent, incandescent, hid, metal halide, halogen, decorative, miniature, specialty, stagestudio lamps, and led lamps. Ge chromafit multi vapor lamps r pg 315 ert high pressure sodium sockets to crisp white metal halide conv light 6570 cri operate on standard hps ballasts and auxiliary equipment uses. In a high pressure sodium lamp, a compact arc tube contains a mixture of xenon, sodium and mercury. Golden white light can penetrate, generally use at street, square, parking, place, bus stop, quay and factories.
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