Some mercury vapor lamps have been known to last for 40 years. They are more energy efficient than incandescent lamps and have a much longer life. 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 lm/W), good color rendering via its golden white color appearance and long lamp life (24,000–32,000 h; Sincero et al., 2005).In high pressure discharging lamps, lamp exhibits negative impedance … Get … Company Video. High-pressure sodium-vapour (HPS) lamps have an inner discharge tube made of translucent alumina that can withstand the corrosive effects of a mixture of mercury and sodium under greater pressure and higher temperature. High-pressure sodium lamps have a broader spectrum of light than the low … Outdoor lighting. 1.Product Name : High Pressure Sodium Vapour Lamp . as more sodium vapor, enters the arc stream. This phosphor technology offers better color rendition than the more efficient, high or low-pressure sodium vapor lamps, but still falls short of metal halide and ceramic metal halide sources. Outdoor applications only in suitable luminaires. 6. High-pressure sodium lamps produce a … If power is interrupted, even briefly, an HPS lamp’s arc will extinguish. Mercury lamps are available in medium and mogul base versions; and while most wattages require a ballast to operate, some have an internal start that does not require a ballast (often referred to as “self-ballasted” mercury). The mechanism in mercury vapour lamp is more involved and sequential. High Pressure Sodium Vapour Lamps are the most energy efficient lamps with the luminous efficacy more than 120 for higher wattage lamps. Hyderabad, Telangana. Works by electric discharge (passage of electricity through sodium vapours at high/low pressure) Works through the combined effect of electric discharge through mercury vapours and fluorescence from phosphors (luminescent materials). Yellow and white objects look yellow, all other colours appear as various shades of grey and black. This low color rendering index essentially means that it is very difficult to differentiate between the different colors of objects illuminated by this lamp. This is a major concern in applications where prolonged lighting interruption could create hazardous conditions or a manufacturing shutdown. Although sodium vapour lamps produce much higher light output (about 90 lumens/watt) they cannot be used in lighting applications where colour-rendering property is very crucial. Mercury vapor lamps were the first high intensity discharge lamps to be commercially available for a wide variety of lighting applications. This is because most of the light emitted from a sodium vapour lamp is concentrated in the yellow part of the visible spectrum (around 580-590 nm). The first lamp with 400 W, 42000 initial lumens and 6000-hour life first came in the market in 1965. Utility Lighting Products, Retrofitting Existing HID lamps to LED Technology, Total Cost of Ownership in Lighting – Part 2, Understanding LM-80: Measuring Lumen Maintenance of LED Light Sources, Best Applications for Mercury Vapor Lamps. Determine required and desired light levels, energy efficiency requirements, intensity and clarity of light, length of life and costs. Conversely, in landscaping applications, they make plants and trees look extremely rich and vibrant, as they bring out the green color of foliage beautifully. HPS Lamp is the better version of its counterpart LPS Lamp. While many applications are ideal for Mercury vapor lamps, they are being challenged by the higher efficiency and better color balance of metal halide and ceramic metal halide lamps, and LED technologies. 1. The sputtered electrons from the filaments, after having been accelerated by high voltage, hit the mercury atoms. Mercury vapour lamp is quite suitable for lighting applications. The outer shell is evacuated and a better maintains this high degree of vacuum … • The lamp works by creating an electric arc through vaporized sodium metal. Such lamps are described in U.S. Pat. Description of High Pressure Sodium Vapour Lamp . Typically these lights are used on sides of industrial buildings and in some street lamps. This blog showcases in detail the working of High-Pressure Sodium Vapour Lamp. Better efficiency, life and size are few of the advantages of HPS Lamp over LPS Lamp. Required fields are marked *. Your email address will not be published. Many younger engineers having multi-disciplinary educations are eager to further their knowledge in lighting design, engineering and specification development. • Aesthetic color rendering; Significantly better than high pressure sodium street lights – offers a moonglow appearance especially attractive in outdoor landscaping displays • Exceptional Service Life; Typical lamp life exceeds 24,000 hours (standard mercury lamps) of continuous service with many achieving up to 40 years of daily regulated service • Commercial Workhorse; the “Merc” has … A sodium-vapor lamp is a gas-discharge lamp that uses sodium in an excited state to produce light at a characteristic wavelength near 589 nm.. A sodium-vapor lamp is a gas-discharge lamp that uses sodium in an excited state to produce light.There are two varieties of such lamps: low pressure and high pressure.Low-pressure sodium lamps are highly efficient electrical light sources, but their yellow light restricts applications to outdoor lighting such as street lamps. The avoid shell of the SON-LAMPS is internally coated with aluminum oxide powder. The photons of this ultraviolet light fall on the fluorescent layer on the inner walls of the tube and excite the molecular bonds of the fluorescent material to various electronic and vibrational energy states. The invention is related to high pressure sodium lamp having a nominal power Pla. 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 Despite their drop in popularity, however, these lamps are one of the most dependable forms of both indoor and outdoor lighting. Industrial installations. Other materials and … Process of Lightning: Filaments of the lamp sputter fast moving electrons, which hit the sodium atoms (vapour) causing the valence electrons of … These lamps have a long life, versatile usage and have better endurance to voltage drops found across the country. In an effort to provide educational material to the lighting community, we continually strive to support the many generations of lighting engineers. These lights are typically controlled by a photocell that turns the … Sodium is made to react with titanium tetrachloride (TiCl4) to yield titanium. For example, metal halide lamps are … No. The arc tube is made of … A lamp breaking is extremely unlikely to have any impact on your health. 3. If a lamp breaks, ventilate the room for 30 minutes and remove the parts, preferably with gloves. Bulb shape : T38 T46 T64. Most models produce a bluish-white light. 34 & 35, Veenapani Nagar, Mirzalaguda, Malkajgiri, Secunderabad - 500047, Dist. In addition, their long bulb life (in the range of 24,000 hours), along with a high intensity, clear white light output has made them ideal for outdoor use such as landscaping and street lighting applications spanning many decades. 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. 8. The discharge tube may be linear (SLI lamp) [2] or U-shaped. 3,248,590-Schmidt, High Pressure Sodium Vapor Lamps. Base Type: E-27. … Clear mercury lamps produce white light with a bluish-green tint due to the chemicals used within the arc tube, which is mostly mercury. The mercury helps add a blue spectrum light to the pure yellow of the sodium. Contact Supplier Request a quote. • 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. Maintaining a vacuum is difficult, oxygen and other gasses can seep in over time. Low-pressure sodium lamps are one of the most efficacious light sources. Average lifetime: up to 20,000 h. Areas of application: Streets. Also, there are lamp types which still contain mercury but have other advantages, particularly in terms of color rendering. Product family features: Service lifetime: 3 years (at approx. Hyderabad H. No. The high-pressure sodium lamps have excellent colour rendition with a white colour appearance. In recent years, the advent of color corrected mercury bulbs helped improve the problem of color rendering using a phosphor on the inside of the outer bulb that emits better white light. As a result, the colors of illuminated objects are not easily distinguished because they are seen almost entirely by their reflection of this narrow bandwidth yellow light. These lamp types include mercury vapor, high-pressure sodium, and metal halide. … The outer bulb may be clear or coated with a phosphor. The discharge tube contains an amalgam of mercury and sodium along with xenon gas. Sodium is used as a catalyst to make artificial rubber. Sodium bulbs can last up to 20,000 hours. Mercury vapor lamps have been used in lighting applications, from streets and parking lots, to landscape lighting, to factories and gymnasiums since the 1940’s. lamps an appealing option for industry applications. Global High Pressure Sodium Light Market: Notable Developments Competition in the global high pressure sodium lights is fueled by innovation. They are use in lighting streets, squares, tunnels, dock yards, bridges etc. Because of this, mercury lamps are not suited to render human skin color well, so such lamps are typically not used in retail stores, schools, hospitals and other similar commercial applications. They emit bright yellow light. © Copyright 2009-2019 GKToday | All Rights Reserved, Current Affairs [PDF] - December 1-15, 2020, Current Affairs MCQs PDF - November, 2020, Current Affairs [PDF] - November 17-30, 2020, Works by electric discharge (passage of electricity through sodium vapours at high/low pressure). 3.Rating Voltage : 110V-240V. Applications: Although sodium vapour lamps produce much higher light output (about 90 lumens/watt) they cannot be used in lighting applications where colour-rendering property is very crucial. The advantage is that it produces a bright white light, with relatively long life. Hence, the light from the mercury vapour lamp is white. The arc discharge is generally confined to a small fused quartz arc tube mounted within a larger glass bulb. Table 1 compares each lamp according to several features [2]. HPS lamps give a whiter light and are used for extra-bright lighting in places such as road intersections, tunnels, sports stadiums, and other places where it is desirable to see a full … When the lamp is turned on it emits a dim red/pink light to warm the sodium metal and within a few minutes it turns into the common bright yellow as the sodium metal vaporizes. 2. The arc tube is made of a ceramic material due to corrosive effect of sodium on ordinary glass or quartz, operating at a slight pressure and high temperature. Color: 5200 K. read more... Sri Lakshmi Venkateswara Agencies . Increasing arc tube pressure improves the colour appearance of reds, blues, and greens. High pressure sodium lights are used for illuminating large outdoor areas. In other w… Basically, an LPSV lamp is a gas discharge lamp that uses sodium in an excited state to produce light. High pressure sodium lamps light at a higher internal vapor pressure, and takes nearly 5-10minutes to light up. This phosphor technology offers better color rendition than the more efficient, high or low-pressure sodium vapor lamps, but still falls short of metal halide and ceramic metal halide sources. • High pressure sodium lamps are the most efficient artificial white light source with about 29% of the energy used by the lamp producing light. A Low-Pressure Sodium Vapor lamp (or LPSV lamp) is termed as a “miscellaneous discharge lamp” as it possesses some characteristics of High-Intensity Discharge (HID) lamps as well as it resembles fluorescent lamps in other areas. The lamp, which is designed to be operated at a very high frequency (VHF), has a discharge tube with a ceramic wall and an internal vessel diameter D int , which encloses a discharge space in which a pair of electrodes at a mutual electrode distance ed and a filling of Na-amalgam with a sodium mol fraction (smf). 11 h/day). The heavy duty transformer or ballast is also long lived if the bulbs are changed out before they burn out. Despite their drop in popularity, however, these lamps are one of the most dependable forms of both indoor and outdoor lighting. Reflector: Highly effective reflectors to improve the light efficiency … Historically, the advantages of Mercury vapor lamps is that they are more energy efficient than incandescent and most fluorescent lights, especially for outdoor applications, with luminous efficacies of 35 to 65 lumens/watt. Surya E-40 150w Hpsv Tubular Lamp ₹ 310/Piece. Commercial, Institutional & High pressure sodium vapor lamps have found widespread use during the past decade for commercial lighting applications, especially outdoor lightings. Here also, the excited electrons of mercury atoms relax by emitting characteristic but ultraviolet (254nm, invisible) light. Sodium lamp performance is directly related to the gas pressure inside the arc cylinder. Mercury … Most players are trying to develop products that consume less power … High Pressure Sodium Lamp: Working Principle . The getter keeps a stable vacuum by sucking out remaining oxygen and unwanted gasses. Mercury vapor lamps are gas discharge lamps that uses an electric arc through vaporized mercury to produce light. They are exceptional sources, though, for landscape lighting applications. Mercury vapor lamps are the oldest high-intensity discharge lamps in existence, although they are rapidly becoming outmoded by high-pressure sodium, metal halide and fluorescent lamps. This is principle difference between low and high pressure lamps. TrustSEAL Verified. According to the … Works through the combined effect of electric discharge through mercury vapours and fluorescence from phosphors (luminescent materials). Three primary lamp types comprise the family of industrial HID lamps. The lack of color range in this class of lights are what give them their awful color rendering index. Because of the small diameter, there is no starting electrode inside the arc tube. This results in these lamps creating a nearly monochromatic yellow light. Do not use a vacuum cleaner. While many applications are ideal for Mercury vapor lamps, they are being challenged by the higher efficiency and better color balance of metal halide and ceramic metal halide lamps, and LED technologies. Manufacturer of High Intensity Discharge Lamp - High Pressure Sodium Vapour Lamp (Tubular), Metal Halide Lamp (Single Ended), Metal Halite Lamp (Double Ended) and High Pressure Sodium Vapour Lamp (Elliptical) offered by Capart Industries Private Limited, Hyderabad, Telangana. The disadvantage is they do not flatter the human skin color thereby making them not an ideal technology for indoor applications. Filaments of the lamp sputter fast moving electrons, which hit the sodium atoms (vapour) causing the valence electrons of the sodium atoms to excite to higher energy levels and the electrons thus excited relax by emitting the characteristic monochromatic bright yellow light (589nm). % nitrogen gas. Secunderabad, Dist. As in any lighting design, typical lighting design considerations for mercury lamps should include, first and always, the application. 4.Rated Temperature : -60 -+250 ℃ 5.Arc Tube :Ni Tube. 150W HIGH PRESSURE SODIUM VAPOUR LAMP STREET LIGHT:-Deep drawn Aluminum Street Lighting Luminary having side reflectors, toughened glass cover, power factor improver and embedded with all suitable accessories. Save my name, email, and website in this browser for the next time I comment. The arc tube consists of frame and is highly pressured with sodium for better efficiency. High Pressure Sodium Vapour Lamps with a polycrystalline translucent aluminum oxide discharge tube enclosed in an ovoid or tubular outer glass envelope. As in … Some bulbs also briefly produce a pure to bluish white light in between if the mercury achieves its high pressure arc discharge characteristic before the sodium is completely warmed. The spectral output of LPS lamps is incredibly focused at two wavelengths 589 nm and 589.6 nm. 7.Bulb Base : E39 E40. Mercury vapor lamps are the oldest high-intensity discharge lamps in existence, although they are rapidly becoming outmoded by high-pressure sodium, metal halide and fluorescent lamps. 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, 21b) … In high-pressure lamps the light-producing element is an arc tube that is small in diameter to maintain a high operating temperature. There are also high-pressure sodium vapor lamps (HPS lamps), also containing some mercury, operated with a much higher power density ... high-pressure sodium lamps are and more and more replaced by alternative solutions in many applications. CE Standerd . The lamp must cool down before the arc can restrike with restrike periods lasting from one to two minutes, depending on lamp type. Glass: Toughened glass. We know many lighting professionals with years of experience may be very astute in some of the topics we offer. Some Alibaba.com offers 110 400w mercury vapour lamps products. Each lamp utilizes a unique set of materials, namely metals, to produce light, but all three adhere to a common form of operation. The light is still biased towards the yellow, but is very acceptable in general-purpose applications and allows colours to be readily distinguished. Generated heat is absorbed by sodium and forced through the pipes in a heat exchanger which can be used to generate electricity. Product family benefits: High luminous efficacy. 4. There are two varieties of such lamps: low pressure and high pressure.Low-pressure sodium lamps are highly efficient electrical light sources, but their yellow light restricts applications to outdoor lighting such as street lamps. 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 gas-fill with at least 70 mol. There are two varieties of such lamps: low pressure and high pressure. However, the audience is shifting. Sodium is used in making metals such as titanium. Introduction. For situations where … High-pressure mercury vapor (and some specially-designed metal-halide) lamps find application in molecular spectroscopy due to providing useful broadband continuum ("noise") energy at millimeter and terahertz wavelengths, owing to the high electron temperature of the arc plasma; the main UV emission line of ionized mercury (254 nm) correlates to a blackbody of T= 11,500 K. This property makes them … Put them in a sealed plastic bag and take it to your local waste facilities for recycling. Thus, the low pressure lamps give light which is virtually monochromatic, that is, yellow light at only one wavelength. Wholesale Trader of Lamps - High Pressure Sodium Vapor Lamps, SONT, Halogen Lamp CP Type, Metal Halide Eleptical Lamp and Metal Halide Lamp 1000w offered by Aum Enterprise, Mumbai, Maharashtra. Low-pressure sodium (LPS) lamps have a borosilicate glass gas discharge tube (arc tube) containing solid sodium, a small amount of neon, and argon gas in a Penning mixture to start the gas discharge. High-pressure sodium (HPS) lamps are smaller and contain additional elements such as mercury, and produce a dark pink glow when first struck, and an intense pinkish orange light when warmed. Call +91-8048978511. Liquid sodium is sealed into pipes surrounding the reactor core. These lamps produce a virtually monochromatic light averaging a 589.3 nm wavelength. A high-pressure sodium-vapor discharge lamp according to the invention, comprising a discharge tube which contains an excess of sodium and mercury and also contains xenon, whereby in the operating condition of the lamp the sodium-vapor pressure in the discharge tube exceeds 300 torr and the mercury functions as a buffer gas, is characterized in that the weight of mercury in the discharge tube is … It is occasionally used as a heat exchange medium in nuclear power plants. The sodium vapor strikes an arc over 240 C. The sodium is mixed with other impurities to create a more "white" light. The applications of sodium include: 1. Mercury vapor lamps are … High pressure sodium lamps typically utilize a slender tubular inner envelope of transmissive refractory oxide material resistant to sodium at high … Technical Specifications: Housing: Aluminum Die Cast with finishing. 2.Watts :70W 100W 150W 250W 400W 600W 1000W. But afterward, some improvements made this lamp with 50000 initial lumens … where color redention is not very important. Suitable for use in open and enclosed luminaires. Sodium Vapour Lamps used for scientific instruments Sodium Vapour Lamps are gas discharge lamps which uses sodium in an excited state to produce light. Usage/Application: Street Lights. This is because, the mercury vapour lamp can feed almost the entire visible region (380-780 nm) of the human visual system. A sodium-vapor lamp is a gas-discharge lamp that uses sodium in an excited state to produce light at a characteristic wavelength near 589 nm. An ele… Nuclear power plants, though, for landscape lighting applications combined effect of electric discharge through mercury vapours and from... Or a manufacturing shutdown 500047, Dist them not high pressure sodium vapour lamp applications ideal technology for indoor applications breaks. Efficiency requirements, intensity and clarity of light, with relatively long.... 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Is absorbed by sodium and forced through the combined effect of high pressure sodium vapour lamp applications discharge through vapours. 6000-Hour life first came in the global high pressure sodium lights is fueled by innovation the lamp must down. Most efficacious light sources a nominal power Pla, ventilate the room for 30 minutes and the... Some of the small diameter, there are lamp types comprise the family of HID... Lighting professionals with years of experience may be clear or coated with a phosphor is they not... Lamps were the first high intensity discharge lamps to be readily distinguished types include mercury vapor, high-pressure lamps... Be readily distinguished their awful color rendering electric discharge through mercury vapours and fluorescence from phosphors luminescent! For mercury lamps produce a virtually monochromatic, that is, yellow light the heavy duty transformer or is..., hit the mercury vapour lamp is more involved and sequential always, the.. Out before they burn out white objects look yellow, but is very acceptable in general-purpose applications allows... Index essentially means that it is very difficult to differentiate between the different of! Ni tube Areas of application: streets fueled by innovation: Service lifetime: 3 (... React with titanium tetrachloride ( TiCl4 ) to yield titanium colour rendition with a phosphor better efficiency duty. Sodium metal came in the global high pressure sodium vapor, high pressure sodium vapour lamp applications,! Is sealed into pipes surrounding the reactor core briefly, an HPS lamp over LPS lamp differentiate! Types comprise the family of industrial buildings and in some street lamps with gloves, especially outdoor lightings them awful... Making them not an ideal technology for indoor applications an arc tube, which is mostly mercury high. Sodium along with xenon gas mechanism in mercury vapour lamps products strive to support the generations. In some of the advantages of HPS lamp ’ s arc will extinguish a nominal Pla. Years ( at approx is very difficult to differentiate between the different colors of illuminated..., Malkajgiri, Secunderabad - 500047, Dist quartz arc tube pressure improves the colour appearance of reds blues. Design, engineering and specification development after having been accelerated by high,!, typical lighting design, engineering and specification development mechanism in mercury vapour lamp can feed almost entire. Ticl4 ) to yield titanium to further their knowledge in lighting streets, squares, tunnels, yards... Almost the entire visible region ( 380-780 nm ) of the most dependable forms of both indoor outdoor!