Sodium Vapour Lamps used for scientific instruments Sodium Vapour Lamps are gas discharge lamps which uses sodium in an excited state to produce light. Call +91-8048978511. 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. … The spectral output of LPS lamps is incredibly focused at two wavelengths 589 nm and 589.6 nm. High Pressure Sodium Vapour Lamps with a polycrystalline translucent aluminum oxide discharge tube enclosed in an ovoid or tubular outer glass envelope. The mechanism in mercury vapour lamp is more involved and sequential. 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 … High pressure sodium vapor lamps have found widespread use during the past decade for commercial lighting applications, especially outdoor lightings. Each lamp utilizes a unique set of materials, namely metals, to produce light, but all three adhere to a common form of operation. Product family features: Service lifetime: 3 years (at approx. According to the … 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. 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 outer bulb may be clear or coated with a phosphor. 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). Sodium is used in making metals such as titanium. Basically, an LPSV lamp is a gas discharge lamp that uses sodium in an excited state to produce light. Maintaining a vacuum is difficult, oxygen and other gasses can seep in over time. The sodium vapor strikes an arc over 240 C. The sodium is mixed with other impurities to create a more "white" light. 34 & 35, Veenapani Nagar, Mirzalaguda, Malkajgiri, Secunderabad - 500047, Dist. These lights are typically controlled by a photocell that turns the … 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. They are use in lighting streets, squares, tunnels, dock yards, bridges etc. Works through the combined effect of electric discharge through mercury vapours and fluorescence from phosphors (luminescent materials). If power is interrupted, even briefly, an HPS lamp’s arc will extinguish. This is a major concern in applications where prolonged lighting interruption could create hazardous conditions or a manufacturing shutdown. HPS Lamp is the better version of its counterpart LPS Lamp. In other w… Hyderabad, Telangana. In high-pressure lamps the light-producing element is an arc tube that is small in diameter to maintain a high operating temperature. 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 CE Standerd . This is principle difference between low and high pressure lamps. • 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 … Mercury vapor lamps are … It is occasionally used as a heat exchange medium in nuclear power plants. We know many lighting professionals with years of experience may be very astute in some of the topics we offer. In an effort to provide educational material to the lighting community, we continually strive to support the many generations of lighting engineers. High-pressure sodium lamps produce a … Product family benefits: High luminous efficacy. Other materials and … Outdoor applications only in suitable luminaires. 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. Here also, the excited electrons of mercury atoms relax by emitting characteristic but ultraviolet (254nm, invisible) light. 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. Outdoor lighting. 3.Rating Voltage : 110V-240V. 1. 3. Despite their drop in popularity, however, these lamps are one of the most dependable forms of both indoor and outdoor lighting. The discharge tube contains an amalgam of mercury and sodium along with xenon gas. 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 high-pressure sodium lamps have excellent colour rendition with a white colour appearance. 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) … Mercury vapour lamp is quite suitable for lighting applications. Determine required and desired light levels, energy efficiency requirements, intensity and clarity of light, length of life and costs. This is because, the mercury vapour lamp can feed almost the entire visible region (380-780 nm) of the human visual system. Process of Lightning: Filaments of the lamp sputter fast moving electrons, which hit the sodium atoms (vapour) causing the valence electrons of … 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). … 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. 4. 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. Typically these lights are used on sides of industrial buildings and in some street lamps. Mercury vapor lamps were the first high intensity discharge lamps to be commercially available for a wide variety of lighting applications. lamps an appealing option for industry applications. Reflector: Highly effective reflectors to improve the light efficiency … High-pressure sodium lamps have a broader spectrum of light than the low … 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 first lamp with 400 W, 42000 initial lumens and 6000-hour life first came in the market in 1965. Commercial, Institutional & This results in these lamps creating a nearly monochromatic yellow light. The sputtered electrons from the filaments, after having been accelerated by high voltage, hit the mercury atoms. 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. 1.Product Name : High Pressure Sodium Vapour Lamp . 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. Usage/Application: Street Lights. The arc tube consists of frame and is highly pressured with sodium for better efficiency. • The lamp works by creating an electric arc through vaporized sodium metal. Secunderabad, Dist. Hence, the light from the mercury vapour lamp is white. The getter keeps a stable vacuum by sucking out remaining oxygen and unwanted gasses. If a lamp breaks, ventilate the room for 30 minutes and remove the parts, preferably with gloves. 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.. 6. 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. 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). They emit bright yellow light. 7.Bulb Base : E39 E40. Get … The disadvantage is they do not flatter the human skin color thereby making them not an ideal technology for indoor 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 arc tube is made of … 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. Table 1 compares each lamp according to several features [2]. Color: 5200 K. read more... Sri Lakshmi Venkateswara Agencies . These lamps produce a virtually monochromatic light averaging a 589.3 nm wavelength. The mercury helps add a blue spectrum light to the pure yellow of the sodium. Better efficiency, life and size are few of the advantages of HPS Lamp over LPS Lamp. For situations where … 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. 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. A lamp breaking is extremely unlikely to have any impact on your health. 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. 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. Liquid sodium is sealed into pipes surrounding the reactor core. Sodium lamp performance is directly related to the gas pressure inside the arc cylinder. The advantage is that it produces a bright white light, with relatively long life. 2.Watts :70W 100W 150W 250W 400W 600W 1000W. Thus, the low pressure lamps give light which is virtually monochromatic, that is, yellow light at only one wavelength. The invention is related to high pressure sodium lamp having a nominal power Pla. Base Type: E-27. However, the audience is shifting. 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 mercury vapor raises the gas pressure and operating voltage, and the sodium vapor produces light when the pressure within the arc tube is sufficient. 8. 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. Most players are trying to develop products that consume less power … High pressure sodium lamps light at a higher internal vapor pressure, and takes nearly 5-10minutes to light up. Suitable for use in open and enclosed luminaires. The heavy duty transformer or ballast is also long lived if the bulbs are changed out before they burn out. % nitrogen gas. As in any lighting design, typical lighting design considerations for mercury lamps should include, first and always, the application. Yellow and white objects look yellow, all other colours appear as various shades of grey and black. Save my name, email, and website in this browser for the next time I comment. Technical Specifications: Housing: Aluminum Die Cast with finishing. 4.Rated Temperature : -60 -+250 ℃ 5.Arc Tube :Ni Tube. 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. 2. Also, there are lamp types which still contain mercury but have other advantages, particularly in terms of color rendering. This low color rendering index essentially means that it is very difficult to differentiate between the different colors of objects illuminated by this lamp. TrustSEAL Verified. For example, metal halide lamps are … Sodium is made to react with titanium tetrachloride (TiCl4) to yield titanium. 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 outer shell is evacuated and a better maintains this high degree of vacuum … High Pressure Sodium Vapour Lamps are the most energy efficient lamps with the luminous efficacy more than 120 for higher wattage lamps. Many younger engineers having multi-disciplinary educations are eager to further their knowledge in lighting design, engineering and specification development. Such lamps are described in U.S. Pat. 3,248,590-Schmidt, High Pressure Sodium Vapor Lamps. The lack of color range in this class of lights are what give them their awful color rendering index. Sodium bulbs can last up to 20,000 hours. Required fields are marked *. Three primary lamp types comprise the family of industrial HID lamps. Company Video. Some mercury vapor lamps have been known to last for 40 years. As in … 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 … 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. Description of High Pressure Sodium Vapour Lamp . Introduction. Generated heat is absorbed by sodium and forced through the pipes in a heat exchanger which can be used to generate electricity. High Pressure Sodium Lamp: Working Principle . as more sodium vapor, enters the arc stream. where color redention is not very important. 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. Because of the small diameter, there is no starting electrode inside the arc tube. 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 … Average lifetime: up to 20,000 h. Areas of application: Streets. Do not use a vacuum cleaner. Hyderabad H. No. Low-pressure sodium lamps are one of the most efficacious light sources. The avoid shell of the SON-LAMPS is internally coated with aluminum oxide powder. They are exceptional sources, though, for landscape lighting applications. 11 h/day). 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. • High pressure sodium lamps are the most efficient artificial white light source with about 29% of the energy used by the lamp producing light. 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. The discharge tube may be linear (SLI lamp) [2] or U-shaped. Despite their drop in popularity, however, these lamps are one of the most dependable forms of both indoor and outdoor lighting. There are two varieties of such lamps: low pressure and high pressure. The lamp must cool down before the arc can restrike with restrike periods lasting from one to two minutes, depending on lamp type. 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. 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. 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. But afterward, some improvements made this lamp with 50000 initial lumens … Bulb shape : T38 T46 T64. Contact Supplier Request a quote. 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. High pressure sodium lamps typically utilize a slender tubular inner envelope of transmissive refractory oxide material resistant to sodium at high … The arc discharge is generally confined to a small fused quartz arc tube mounted within a larger glass bulb. 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 … Increasing arc tube pressure improves the colour appearance of reds, blues, and greens. 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. © 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). Most models produce a bluish-white light. They are more energy efficient than incandescent lamps and have a much longer life. Put them in a sealed plastic bag and take it to your local waste facilities for recycling. Some Alibaba.com offers 110 400w mercury vapour lamps products. These lamps have a long life, versatile usage and have better endurance to voltage drops found across the country. High pressure sodium lights are used for illuminating large outdoor areas. Global High Pressure Sodium Light Market: Notable Developments Competition in the global high pressure sodium lights is fueled by innovation. Conversely, in landscaping applications, they make plants and trees look extremely rich and vibrant, as they bring out the green color of foliage beautifully. An ele… The applications of sodium include: 1. Surya E-40 150w Hpsv Tubular Lamp ₹ 310/Piece. Mercury … Mercury vapor lamps are gas discharge lamps that uses an electric arc through vaporized mercury to produce light. Industrial installations. Your email address will not be published. No. 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. The light is still biased towards the yellow, but is very acceptable in general-purpose applications and allows colours to be readily distinguished. 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. 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. Sodium is used as a catalyst to make artificial rubber. These lamp types include mercury vapor, high-pressure sodium, and metal halide. Glass: Toughened glass. This blog showcases in detail the working of High-Pressure Sodium Vapour Lamp. Creating a nearly monochromatic yellow light through the combined effect of electric discharge through mercury vapours and fluorescence from (... Monochromatic light averaging a 589.3 nm wavelength three primary lamp types include mercury vapor high pressure sodium vapour lamp applications were the first with... Lighting community, we continually strive to support the many generations of engineers. 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