High pressure sodium ballast wiring diagram collection. Venture lightings high pressure sodium lamps hps lamps. In 1860, john thomas way used arc lamps operated in a mixture of air and mercury vapor at atmospheric pressure for lighting. Find here online price details of companies selling sodium lamps. Lowpressure sodium lighting is a monochromatic source and is often rejected for its deficiency in supporting color. Sodium retaining reservoirsprovide even distribution of sodium for 100% lumen maintenance, long lamp life and lamp wattage control. Lamptech museum of electric lamp technology sox lowpressure sodium. High intensity discharge hid3 is the term commonly used for several types of lamps, including metal halide, high pressure sodium, and mercury vapor lamps. Dec 25, 20 sodium vapor lamp is the most energy efficient of all other lamps because it uses all its current to produce yellow light. An electric current in the gas energizes mercury vapor which delivers ultraviolet radiation through discharge process and the ultraviolet radiation causes the phosphor coating of the lamp inner wall to radiate visible light. I have a high pressure sodium vapor lamp that is going. Low pressure sodium lighting flagstaff dark skies coalition. Lumalux super and sox lamp ratings are based on measurements at constant input voltage.
Most of highpressure sodiumvapor lamps also contain mercury to improve the startup. Venture offersquality hps lamps that operate on our matching hps basllasts. 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 vapour lamps with a polycrystalline translucent aluminum oxide discharge tube enclosed in an ovoid or tubular outer glass envelope. Low pressure sodium bulbs produce light in a very narrow, yellow region of the visible spectrum. Pdf high pressure sodium vapor lamps due to long service life high light, as the most. The lamps are also physically largeabout 4feet long for the 180watt sizeso light distribution from fixtures is less controllable. A sodiumvapor lamp is a gasdischarge lamp that uses sodium in an excited state to produce light at a characteristic wavelength near 589 nm. Ushio germicidal lamps are low pressure mercuryarc lamps that emit radiation peaking at 253.
High pressure sodium lamps lighting associates, inc. Due to the long life, efficient energy usage and good vision, sodium vapor lamps are used for street lighting. These bulbs have a long rated life and high efficency, but virtually no ability to render color. Thus, a uniform distribution of sodium along the discharge tube is achieved, which means a more stable discharge, a higher efficacy and a better lumen maintenance and lamp life. Increasing arc tube pressure improves the colour appearance of reds, blues, and greens.
Other materials and gases are used to help start the lamp or control its color. The sodium lamp how it works and history edison tech center. All credits and sources are located at the bottom of each lighting page. Nowadays, highpressure sodium hps lamps are widespread in outdoor. Put them in a sealed plastic bag and take it to your local waste facilities for recycling. Sodium gas discharge lamps can be distinguished in two main groups. Now lets look at low pressure and high pressure sodium lamps. In a high pressure sodium lamp, a compact arc tube contains a mixture of xenon, sodium and mercury.
It is still widely used in certain cities like bogota, san diego, and some european cities. High pressure sodium lamps university of edinburgh. Apr 21, 2006 he created a series of low voltage highcurrent tubular lamps which were operated in ovens to vaporise the sodium to the required pressure, and with a sodium vapour pressure of 10pa in kryptonfilled tubes measured discharge efficacies as great as 350lmw again not including the power supplied by the oven to heat the lamp. At you can purchase at least 6 different low pressure sodium light bulbs.
The most efficient lighting sources available today are high intensity discharge hid and lowpressure sodium lps lamps. Low pressure sodium lamps were invented first in 1920 by arthur h. Low pressure sodium lamps are one of the most efficacious light sources. In 1932 a collaboration of general electric company of england gec, philips in the netherlands, and osram in germany introduced a discharge lamp that used low pressure sodium vapor. Up to now, thousands of gas lanterns illuminate numerous streets in berlin. The construction and applications of sodium vapour 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. Definition of a plasma mixture of electrons, ions and neutral particles in different excited states and with strong. The heat generated by the arc then vaporizes the mercury and sodium. When heated up the metal would vaporize and the lamp would glow yellow. The glass tube is made specially chemical resistant to withstand the chemical reaction of hot sodium. High pressure sodium lamps fall into this category. 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.
High pressure sodium lights are more popular than low pressure lights because of this significant color difference. The lamp works by creating an electric arc through vaporized sodium metal. Sodium vapour lamps neon tube fluorescent tubes\ lamps the tubes filled with argon gas at low pressure and one. Browse the sont products and find the product that you are looking for by using the compare option. The key to a workable sodium lamp lay in a special glass. Pdf click on the lamp product number to view detailed lamp specifications. A low pressure sodium vapour lps lamp contains an inner discharge tube made of borosilicate glass that is fitted with metal electrodes and filled with neon and argon gas and a little metallic sodium. A fluorescent lamp is a low weight mercury vapour lamp that uses fluorescence to deliver visible light. Low pressure sodium lamps soxe, sox platt electric supply. High pressure sodium lamps or hps lamps electrical4u.
Either philips or osram make sodium vapour lamp is supplied. About 20% of these are high pressure sodium lamps, 67% are ballasts, and 6% are street lights. Get info of suppliers, manufacturers, exporters, traders of sodium lamps for buying in india. Sont son high pressure sodium philips philips lighting. High pressure sodium lights have a better color rendition than low pressure sodium lights. The following information is provided by osram sylvania as a courtesy to its customers. The low efficacy is a natural result of the relatively short discharge length, which gives rise to a high discharge current density. I have a high pressure sodium vapor lamp that is going onand off discussion in homesteading questions started by mldollins, mar 15, 2011. Click on the icon to the right to download the latest version of adobe. A secondary effect of the short discharge is that the lamp voltage is rather low, which means that more power is dissipated in the ballast thus penalising system efficacy. Bullough, lighting design and application, september 2004. 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.
The lamp must be operated at horizontal or nearly horizontal position to keep the sodium uniform throughout. Son son high pressure sodium philips philips lighting. The aperture phosphorcoated lamps that jelight company produces employ the same basic design as the doublebore, low pressure mercury vapor lamps with the exception of a special phosphor coating. Sodium lamp performance is directly related to the gas pressure inside the arc cylinder. If its a pole light it could be either the transformer or the photo cell on top of the fixture. The avoid shell of the sonlamps is internally coated with aluminum oxide powder. A sodium vapor lamp is a gasdischarge lamp that uses sodium in an excited state to produce light.
Fluorescent lamp and working principle of fluorescent lamp. The gas that is present is usually xenon, which is used for starting the lamp. High pressure sodium lamps may be used in open luminaires except for item 67527 lu400t7 rsc and sox low pressure sodium, which must be operated in an enclosed fixture. Their arc tubes contain sodium, and the metal salt included is typically mercury. Pdf modeling and checking the power quality of high pressure. Rarely will an application using high pressure sodium lamps be a candidate for a change to another light source. The inner surface of the lamp is coated with a fluorescent and often slightly phosphorescent coating made of varying blends of metallic and rareearth. The mercury vapour lamp in construction is similar to sodium vapour lamp. Msc industrial supply is here to support all your metalworking and maintenance repair needs with over 1 million products in stock and ready to ship today.
The xenon gas which is easily ionized, facilitates striking the arc when voltage is applied across the electrodes. An arc is established between two electrodes in a gasfilled tube, causing a metallic vapor to produce radiant energy. The efficacy of a regular incandescent light bulb is only a fraction of the efficacy of a fluorescent bulb. It gives greenish blue colour light, which causes colour distortion. 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. Soxe low pressure sodium lamps is made of a special sodium resistant glass with dimples to collect the sodium in the cooling stage. This test is used to determine if an item can be managed as hazardous. As knowledge of materials and experience making electric lamps grew in the early 20th century, more efficient light sources began to reach the market. When current passes between the electrodes, it ionizes the neon and argon, giving a. Cleveland, oh 44112 usa less than 1% of the mercury in a high pressure sodium lamp is in vapor form and will be released if a lamp is accidentally broken. The common fluorescent lamp is actually a low pressure mercury arc lamp.
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. Signaling on lowvoltage electrical installations in. A lowpressure sodium vapor lamp whose wavelength is 5. A low pressure sodium vapour lps lamp contains an inner discharge tube made of borosilicate glass that is fitted with metal electrodes and filled with neon and argon gas and a little. High pressure metal halide lamps high pressure sodium. High pressure sodium hps lamps, a member of the high intensity discharge. In gas discharge lamps, light is generated primarily by an electrically excited plasma. The discharge tube may be linear sli lamp 2 or ushaped. Sodiumvapour lamp, electric discharge lamp using ionized sodium, used for street lighting and other illumination. Chapter low pressure discharge lamps slide 7 incoherent light sources prof. The high pressure lights produce a more desirable golden to white light, while the color produced by low pressure lights is yellow to orange. Philipsmetalhalideallstartcdm lamps allwattagebis33620. Sodium vapor lamps are some of the most efficient lamps in the world. Sylvania brand low pressure sodium lamps are exempted from the requirements of the osha hazard communication standard 29 cfr 1910.
In other words, the sodium migrates over time to the coldest part of the lamp, and it is the temperature at this region that determines the vapour pressure and which must be kept as close as possible to 260c. A change away from low pressure sodium would be made for other reasons, such as a desire for better color. Low pressure sodium lamp, type na10 national museum of. Shop a large range of low pressure sodium lamp at msc industrial supply. It is a gasdischarge lamp that uses sodium in an excited state to produce light. Lowpressure sodium lamps are highly efficient electrical light sources, but. There is a brief warmup period for the lamp to reach full brightness. A lowpressure sodium vapor lamp or lpsv lamp is termed as a miscellaneous discharge lamp as it possesses some characteristics of. Chapter 8 energy use for lighting figure 31 the energy performance of lamps is expressed as efficacy which is a measure of light output, in lumens, per watt of electrical input lumens per watt.
This coating covers more than 70% of the diameter of the lighted length of the lamp. Unfollow low pressure sodium lamp to stop getting updates on your ebay feed. When a high pressure sodium lamp is to be disposed, it is subject to the current epa toxicity characteristic leaching procedure tclp disposal criteria. Even though there may be room in low pressure sodium technology to extend its lifetime further, manufacturers can earn greater revenues with more modern light source technologies and for commercial reasons it is no longer interesting to invest effort in the further improvement of the low pressure sodium lamp. If a lamp breaks, ventilate the room for 30 minutes and remove the parts, preferably with gloves. Pdf the high pressure sodium lamp is a high energy outdoor light source that belongs to the high intensity discharge lamp family. Soxe lowpressure sodium vapour lamps have a ushaped discharge tube, containing sodium, enclosed in an evacuated clear tubular outer bulb. Lowpressure sodiumvapour lamp instrument britannica. The only strategies to improve the energy efficiency of a low pressure sodium system is to avoid overlighting and limit the hours of use to essential times. 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. Charles wheatstone observed the spectrum of an electric discharge in mercury vapor in 1835, and noted the ultraviolet lines in that spectrum. The first lamp was a round bulb with two electrodes on each side.
Contains easytounderstand explanations and examples for commercial and industrial energy technologies. Lowpressure sodium lamps operate much like fluorescent lamps and require ballast. Soxe lamps are distinguished by the use of the black bases compared to the tan bases used on sox lamps. High pressure metal halide lamps high pressure sodium lamps low pressure sodium lamps high pressure quartz metal halide lamps ceramic metal halogen lamps philips hid lamps master citywhite cdoet ceramic metal halide lamp, with opalized ovoid outer bulb shape, used in outdoor offering pleasant white light. Philips lighting 321521 t21 sox low pressure sodium lamp 91 watt by22d double contact bayonet base 600 lumens 1800k warm white. Low pressure sodium lamps only give monochromatic yellow light and so inhibit color vision at night. They have an efficiency of up to 190 lumens per watt compared to an incandescent street lamp which has between 15 and 19. High pressure sodium lamps, invented in 1931, use sodium in an excited state to produce light. Standard lumalux standard lumalux lamps are known for high efficacy, long life, and reliability.
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 two varieties of such lamps exist. All high pressure sodium lamps contain some amount of mercury. May 22, 20 there are two types of sodium lamps lowpressure lps highpressure son. Comparative study of 250 w high pressure sodium lamp. Sodium vapour lamp, electric discharge lamp using ionized sodium, used for street lighting and other illumination. High pressure sodium lights work by creating an electric arc through vaporized sodium metal, while additional materials and gases work to start the lamp and control the its color.
High pressure sodium lamp long run 4y, tubular bulb clear, base e40. Put a peice of black tape over the eye of the photo cell and see. Characteristics and features everything about blood pressure and its measurement. High efficiency lamps are available and delamping may be a possiblity if an area is overlit. Components the arc tube contains the xenon and sodium mercury amalgam mixture and provides.
Lamps are available from 35 to 150 watts in medium base and 50 to. Mar 10, 2020 high pressure 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. All lamps should be switched off when not in use but hid lamps are commonly left on for long periods of time. They are commonly used in public parking lots, roadways, and other security areas. Pdf the influence of high pressure sodium lamps on the power. Standard high pressure sodium lamp, tubular bulb clear, base e40. 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 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. Apparently low pressure sodium works, which is plan b, but i saw a bunch of forum posts where people bought a real one like a van keuren, kemet, etc for pretty cheap, but ive been looking for like a year and havent ever seen anything on ebay or elsewhere. A low pressure sodium vapor lamp whose wavelength is 5. A fluorescent lamp tube is filled with a gas containing low pressure mercury vapor and argon, xenon, neon, or krypton. Hps and the 700watt mercuryvapor lamps along a iomile stretch of this. The low pressure sodium arc discharge lamp was first made practical around 1920 owing to the development of a type of glass that could resist the corrosive effects of sodium vapor. Benefits of high pressure sodium the main benefit of using hps is that they are the only light source with a similar efficiency.
Because their construction and performance is in many ways different, they are dealt with in two different. This sodium vapour contains millions of individual atoms. See the photos lower on this page for more details. A lamp breaking is extremely unlikely to have any impact on your health. A wide variety of low pressure sodium lamp options are available to you, such as bulb type, application, and certification. Dec, 2015 low pressure sodium vapour lamp this lamp was invented first in 1920 by arthur h. Because of this, they are not used for everyday lighting purposes, even though they give extremely high output. The yellow light given off by a lowpressure sodium lamp comes from a tube of sodium vapour at a temperature of around 260c which is excited by electrical energy. The lamp is filled with a halogen gas at low pressure, instead of an inert gas. Dec 06, 2011 the low pressure sodium lamp is also known as an lps lamp.