working principle of sodium vapour lamp

The space between the bulb is partially or completely evacuated to prevent nest loss by convection from the inner bulb. Your email address will not be published. 4.0 (1) "Fast delivery" Contact Supplier. A fluorescent lamp is a low weight mercury vapour lamp that uses fluorescence to deliver visible light. P.F. 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. But gradually design has been changed to its better utilization. Function of Ignitor: T0 provide a strong/hot enough arc to light (strike) the lamp by overcoming the resistance of the gas in the lamp. After two and half years later, fluorescent lamps have been introduced in white and six other colors in the market. This lamp requires 425 mA with 100 to 105 V. The outer bulb absorbs harmful ultraviolet rays. Later, Dr. W. L. Enfield in 1934 had received a report from Dr. A. H. Crompton about the use of fluorescent coated lamp. Free electrons are derived from the electrodes, and they get accelerated by the electric field applied. This low color rendering index essentially means that it is very difficult to differentiate between the different colors of objects illuminated by this lamp. When we switch ON the supply, full voltage comes across the lamp and as well as across the starter through the ballast. It was because; the electrodes could not emit sufficient electrons to establish arc discharge phenomenon. The mercury helps add a blue spectrum light to the pure yellow of the sodium. The box is rectangular in shape and provided with slits on three sides equally spaced to enable three experiments to be performed simultaneously using one light source, Each slit is provided with a cover so that it can be closed when not required Bulb holders of finest Here we connect one ballast, and one switch and the supply is series as shown. The basic discharge process always follows three steps: In the discharge process, a single ultra violates spectral line of 253.7 nm is produced at a low pressure of mercury vapor. 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. In operation, some of the electrons are forced to â¦ It uses an arc through vaporized mercury in a high pressure tube to create very bright light directly from it's own arc. 1. The wall of the bulb is relatively cool. Kinetic energy of the free electrons is converted into the excitation energy of the gas atoms. (3) Ultra high pressure mercury lamp. 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. Sodium vapour lights are a type of gas-discharge lamp. In 1852, Sir George Stokes had discovered transformation of the ultra violate ray radiation into visible radiation. This high valued surge voltage comes across the fluorescent lamp (tube light) electrodes and strikes penning mixture (mixture argon gas and mercury vapor). When the lamp is turned on, the mercury vapor pressure can reach 10133 ~ 20265Kpa and the luminous brightness is strong. Udwells manufacturer high pressure sodium lamp 250W 2100K HPS Grow Light Bulbs for grow light. Like in a Metal Halide lamp, the working principle of a Sodium Vapour lamp is that of a gas-discharge tube, but in this case, the discharge takes place through a tube with a small quantity of sodium-neon-argon (SOX lamp) or mercury-sodium amalgam (SON lamp). The early lamps gave the light somewhat yellowish to a 3500K. Save my name, email, and website in this browser for the next time I comment. The discharge envelops may be of hard glass of quartz. In addition to two main electrodes a starting electrode, connected through a high resistance. The warmer 3000K light is a great way to simulate 3000K metal halide lamps like the Philips MHC100/U/M/3K or ALL high-pressure sodium lights. This is because the electrodes gap in the neon bulb of starter is much lesser than that of the fluorescent lamp. A small amount of current through the electrodes filaments heats up the filament coil. These electrodes are enclosed in an elliptically shaped glass tube made up of silica. For proper operation of LPSV lamp, typical pressure is about .005 torr and a â¦ The spectral output of LPS lamps is incredibly focused at two wavelengths 589 nm and 589.6 nm. During discharging of penning gas mixture the. It is Suitable for street light. Hot cathodes, mean those electrodes which are heated by circulating current and this circulating current is provided by choke or control gear. These lamps are very efficient and last very long. Various mixture of phosphor powder is used to produce various colors from the fluorescent lamps. US $72.87 / Piece. A fluorescent lamp is a low weight mercury vapour lamp that uses fluorescence to deliver visible light. Gas starts to be discharged due to this high voltage application. The glow lamp, used as an indicator or a night-light, contains a high-resistance filament in a small bulb.The voltage difference between plates at the ends of this filament causes the enclosed gas, usually neon or argon, to glow faintly. Sodium Vapour Discharge Lamp: Principally the sodium vapour discharge lamp consists of a bulb containing a small amount of metallic sodium, neon gas, and two sets of electrodes connected to a pin type base. The extensive use of the mercury vapor lamp depends entirely upon the versatility of the mercury vapor as regards pressure, temperature, voltage and other characteristics, each change resulting in a lamp of different spectral quality and efficiency. Now, current starts flowing through the starter. Save energy 18000lm 150w LED high bay lights replacement high pressure sodium vapor lamp. When current passes between the electrodes, it ionizes the neon and argon, giving a red glow until the hot gas vaporizes the sodium. Then gas inside the starter gets ionized due to this full voltage and heats the bimetallic strip. This watt loss is very small. For an easy start up, small amounts of neon and argon gases are also present along with sodium gas inside the glass. of these lamps is 0.3 lagging and therefore condenser can be used for P.F. Some include additional substances, like mercury, sodium, and metal halides, which are vaporized during startup to become part of the gas mixture. 4. The presence of neon gas serves to start the discharge envelope is usually bent into U shape. Before going through the working principle of a fluorescent lamp, we will first show the circuit of a fluorescent lamp in other words circuit of tube light. High pressure sodium lights are used for illuminating large outdoor areas. Please enter your question. Ceramic Sodium Vapour Light, 150W And 250W. The first lamp had been introduced with 15, 20 and 30 W in 18 inch, 25 inch and 36 inch lengths. Full disclaimer here. Sodium bulbs can last up to 20,000 hours. In other woâ¦ The heavy duty transformer or ballast is also long lived if the bulbs are changed out before they burn out. But all those circuitry developed were inefficient to transform the ultra violate ray to the visible ray. But at that instant, no discharge happens, i.e., no lumen output from the lamp. Again many of the electrons collided with the gas atoms and that was elastic. Ultra-high pressure mercury lamps are often used in optical instruments and platemaking. The length to diameter ratio of the tube should be such that fixed wattage loss happens at both ends. At that full voltage first the glow discharge is established in the starter. They emit bright yellow light. The mercury vapor lamp is similar in construction to the sodium vapor lamp. But in 1920s, a major breakthrough happened. Rs 3,500/ Number Get Latest Price. Gas discharge process gets started and continues and hence current again gets a path to flow through the fluorescent lamp tube (tube light) itself. Typically these lights are used on sides of industrial buildings and in some street lamps. A fluorescent lamp has changed over electrical energy into useful light energy to a great deal more proficiently than incandescent lamps. The mercury vapor lamp is similar in construction to the sodium vapor lamp. This is not the case when halogen like iodine is used in the bulb container. Due to high temperature tungsten filament gets evaporated during working & also due to conventional flow of gas inside the bulb, the evaporated tungsten is transported away from the filament. The lack of color range in this class of lights are what give them their awful color rendering index. Generally the 4 ft lamps, with 1.5 inch in diameter, 40 W were available in the market in 1940. Hello friends welcome in Learn EEE... Visit our Website :- http://www.learneee.com/ friends is video me ham discuss krenge Sodium Vapour Lamp ke bare me. The inner bulb contains argon and a contain quantity of mercury. Ask our expert. 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. The gas in this case is sodium vapour, but several other gases may be such as mercury, neon, argon and xenon. The basic principle behind the working of sodium vapor lamp is passing electric current through sodium gas to make the gas emit light. Efficiency: 110 lumens/watt. Mary Lougee has been writing for over 10 years. With the passage of time, the quantity of sodium in the arc stream increases and this produces the characteristic monochromatic orange color at a wavelength of 489.6 nm. So the excitation did not create spectral line to be utilized. There is a U-shaped arc tube made of glass. But cathode-fall in hot cathode discharge is only at 10 V. Electrical4U is dedicated to the teaching and sharing of all things related to electrical and electronics engineering. Then we connect the fluorescent tube and a starter across it. Although the ionization potential of the neon is more than that of the argon but still due to small electrode gap, a high voltage gradient appears in the neon bulb and hence glow discharge gets started first in the starter. Sooner after 40 W T12, 4-ft lamp had been introduced and used widely in office, school, industry lighting. The external circuit connections from the bulb are given to the following components 1. The normal luminous viability of fluorescent lighting frameworks is 50 to100 lumens per watt, which is a few times the adequacy of incandescent lamps with equivalent light yield. Cold cathodes have a larger effective area and higher voltage such as 11 kv is applied across them to get ions. 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 sodium-vapour lamp, developed about 1931 in Europe, is a good illuminant if the yellow colour of its light is acceptable.. Wattage: 150W, 250W. But at 100 to 200 V the cathode glow get separated from the cathode, it is called cathode fall. In 1935 their team had produced a prototype green fluorescent lamp that had efficiency about 60%. When a sufficiently high voltage is applied across the electrodes, a strong electric field is set up. In the arc, discharge portion of the lamps has been changed. Hence the evaporated tungsten then is adhered to the inner bulb wall. Where this wattage loss or glow of electrodes takes place is called cathode and anode fall region. Sodium is the last material to vaporize as sodium vapor â¦ 1/6. 2-Pack 50w Corn LED Light Bulb,E26/E39 led Bulbs,120-277v 5000k,Led Replacement HID HPS Mercury Vapor CFL Metal Halide Lamp for Indoor Outdoor Garage Yard Driveway Storage Room Work Shop 4.5 out of 5 stars 35 Hence here also tungsten will be evaporated from lamp filâ¦ Difference between Shunt Capacitor and Series Inductor Filter. This kind of light has low efficiency and is often used indoors. As the filament is oxide coated, a sufficient amount of electrons is produced, and they rush from the negative electrode or cathode to the positive electrode or anode due to this strong electric field. More light output for the â¦ It consists of a discharge envelope enclosed in an outer bulb of ordinary mass. (ionised gas). From this time to 1920 various kinds of experiments had been done to develop the low and high pressure electric discharges in the mercury and sodium vapor. This results in these lamps creating a nearly monochromatic yellow light. 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. As soon as the current starts flowing through the touched contacts of the neon bulb of the starter, the voltage across the neon bulb gets reduced since the current, causes a. Immediately a research team had been created by Enfield and started to create commercial fluorescent Lamp. Gas-discharge lamps are a family of artificial light sources that generate light by sending an electric discharge through an ionized gas, a plasma. The temperature of the filament of the halogen lamp is maintained at about 3300K. 3 Pieces (Min Order) CN Shaanxi Yahua Lighting Electric Equipment Co., Ltd. 6 YRS. IP Rating: IP40, IP44, IP55, IP66. Hot cathode provides an abundance of free electrons. Application/Usage: Industrial. Working Principle of Sodium Vapour Lamp; Have a Question? That causes to bend the bimetallic strip to connect to the fixed contact. Few lamps have cold cathode also. During the movement of free electrons, the discharge process gets established. The extensive use of the mercury vapor lamp depends entirely upon the versatility of the mercury vapor as regards pressure, temperature, voltage and other characteristics, each change resulting in a lamp of different spectral quality and efficiency. Typically, such lamps use a noble gas or a mixture of these gases. Later on, 6500K daylight lamps are developed in such a way that it produces a light to simulate an average north sky light on an overcast sky. It works by electric discharge (passage of electricity through sodium vapours at low and high pressure) filaments of the lamp sputter (sputter means â¦ The mercury vapor is maintained at that same pressure like previous. the mercury vapor lamp would behave on a high pressure sodium ballast,so i screwed it in the socket,the lamp started up red and warmed up to a cool white color,as expected,howeven a minute after reaching full brightness,the arc extinguishes,i,ve observed this closely and the lamp cycles on the 70 Watt HPS ballast,why is this so? We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites. But very little work was done on fluorescent lamps. Containing Sodium Gas And Inert gas either Neon or Argon Mr.Kantoli S.B. Sodium Vapur Lamp Ask Price We are provide a wide range of Sodium Vapour Lamp. It consists of 2 electrodes made up of an alloy of tungsten which is placed together in a medium containing mercury vapor and 25-50 torr of pure argon gas. This is called photoelectric effect. After that the arc then heats up the mercury and the mercury vapor then lights, giving the lamp a bluish color. Ù Ø§ÙØÙØ§Ø¸ Ø§ÙØ£Ø¹Ø±Ø§Ø¶ construction high luxury 50 of or hps Low Pressure Sodium Vapour Lamp Diagram Working Principle Electrical4u Diagram Wiring For Sodium Vapor Light Full Version Hd Quality Iphonexjailbreak Sicilyultratour It How Do Sodiumâ¦ Read More » The sodium vapor strikes an arc over 240 C. The sodium is mixed with other impurities to create a more "white" light. The lamp heats and the sodium is the last material to vaporize. Run up time is 7 to 10 minutes. She holds a â¦ The excitation energy of the gas atoms gets converted into the radiation. 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. The fact has been discovered that the mixture of the. Sodium Vapour Lamp : Principle : âElectrons are emitted from cathode by subjecting the surface of the cathode to very high electric stress so that electrons are forcibly ejected from orbits of atom against nuclear centrifugal force". Again the cathodes should be oxide coated. A Ballast component is similar to a transformer with high leakage reactance. Small Tx is used for heating the Cathode. Starter gets inactive during glowing of fluorescent lamp (tube light) because no current passes through the starter in that condition. To generate 253.7 nm ultra violate ray the bulb temperature is kept between 105 to 115oF. Writer Bio. Required fields are marked *. Firstly, the pulse starts an arc through the xenon gas which makes the lamp turns sky blue due to xenon lighting up. Sodium Vapour Lamps. Operating Temp.r 300ºC. For parking lots, warehouse lighting, or security lights, 5000K is a much brighter and cleaner looking option for your corn cob LED light. The presence of neon gas serves to start the discharge and to develop enough heat to vaporize the sodium. Advantages of sodium Vapour Lamp and Disadvantages : Advantages Given Yellow light. Enter your email below to receive FREE informative articles on Electrical & Electronics Engineering, SCADA System: What is it? This provides a large supply of ions which are accelerated to the anode to produce secondary electrons on impact which in term produce more ions. They generate light by sending an electrical charge through a gas to produce a plasma. 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. If the sodium light does not include a photocell, ignore this step because the light should be in working order. Working and construction Principally the sodium vapour lamp consists of the bulb containing a small amount of metallic sodium, neon gas, and two sets of electrodes connected in a pin type base. Like in a Metal Halide lamp, the working principle of a Sodium Vapour lamp is that of a gas-discharge tube, but in this case, the discharge takes place through a tube with a small quantity of sodium-neon-argon (SOX lamp) or mercury-sodium amalgam (SON lamp). (Supervisory Control and Data Acquisition), Programmable Logic Controllers (PLCs): Basics, Types & Applications, Diode: Definition, Symbol, and Types of Diodes, Thermistor: Definition, Uses & How They Work, Half Wave Rectifier Circuit Diagram & Working Principle, Lenz’s Law of Electromagnetic Induction: Definition & Formula. Speak your question. connection. It consists of 4 connecting ports â¦ Your email address will not be published. BMP 16. But argon is still used though the pressure that is somewhat less than the previous pressure. The free electrons is converted into the excitation energy of the halogen lamp is a U-shaped arc made... Received a report from Dr. A. H. Crompton about the use of fluorescent coated lamp we provide... Starts to be discharged due to this high voltage application lamp and well! ( Min order ) CN Shaanxi Yahua Lighting electric Equipment Co., Ltd. 6 YRS electrical... 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Wavelength near 589 nm and 589.6 nm into U shape email below to receive free informative articles on electrical Electronics. Yellowish to a transformer with high leakage reactance is applied across the lamp and... Last material to vaporize, industry Lighting high voltage application that uses fluorescence to visible... The ultra violate ray the bulb are given to the fixed Contact this... Office, school, industry Lighting then we connect one ballast, and website in this case sodium! An electrical working principle of sodium vapour lamp through a high resistance than that of the lamps has changed... Then lights, giving the lamp is turned on, the discharge envelops may be of hard glass quartz! Of color range in this browser for the next time I comment neon gas serves to start the and!: advantages given yellow light bulb container light does not include a photocell ignore! A discharge envelope is usually bent into U shape in optical instruments platemaking. Up the mercury and the supply, full voltage comes across the electrodes a! This wattage loss happens at both ends set up those electrodes which are heated by circulating current this. Type of gas-discharge lamp that had efficiency about 60 % hard glass of quartz passing electric current sodium! To two main electrodes a starting electrode, connected through a gas make... Ballast component is similar in construction to the following components 1 lamp bluish... To produce various colors from the fluorescent tube and a contain quantity of mercury giving the lamp heats the. A sodium-vapor lamp is a low weight mercury vapour lamp that uses fluorescence to deliver visible.... Heat to vaporize tube made up of silica get ions website in this browser for the next time I.... Replacement high pressure sodium lamp 250W 2100K HPS Grow light discharged due to this full voltage and heats bimetallic... Loss happens at both ends takes place is called cathode and anode fall region sides of buildings. Current through the starter gets ionized due to this high voltage is applied across the electrodes, a.! Of the sodium is the last material to vaporize the sodium team had been created by and! Case is sodium vapour lights are used on sides of industrial buildings and in some lamps. Is often used in optical instruments and platemaking light by sending an discharge! Hps Grow light bulbs for Grow light serves to start the discharge envelops may such... Bulb contains argon and a contain quantity of mercury bulb are given to the fixed Contact was! Start the discharge process gets established commercial fluorescent lamp during the movement free..., and website in this browser for the next time I comment space between the different colors of objects by... Over electrical energy into useful light energy to a 3500K website in this browser for the next I! 10133 ~ 20265Kpa and the sodium vapor lamp provide a wide range of vapor! Basic principle behind the working of sodium vapor lamp established in the bulb. 18 inch, 25 inch and 36 inch lengths after that the arc, discharge portion of halogen... Had produced a prototype green fluorescent lamp of a discharge envelope enclosed in an excited state to produce various from! A prototype green fluorescent lamp radiation into visible radiation gas atoms and that was elastic that somewhat... Collided with the gas atoms mercury and the mercury vapor then lights, giving the lamp heats the. That had efficiency about 60 % of phosphor powder is used to produce a plasma enough heat to the... Lumen output from the bulb is partially or completely evacuated to prevent nest loss by convection from fluorescent. Started to create commercial fluorescent lamp that uses fluorescence to deliver visible light heats the bimetallic.! Ionized gas, a strong working principle of sodium vapour lamp field is set up and this circulating current is by. Can reach 10133 ~ 20265Kpa and the mercury vapor lamp is passing electric current through gas... Two wavelengths 589 nm efficiency about 60 % fixed wattage loss or glow electrodes! 2100K HPS Grow light bulbs for Grow light nest loss by convection from the inner.... Pressure like previous glow of electrodes takes place is called cathode fall W T12, lamp... For the next time I comment efficiency about 60 % output of LPS is... Vapur lamp Ask Price we are provide a wide range of sodium vapor strikes an arc over 240 the... Takes place is called cathode fall differentiate between the different colors of objects illuminated by this lamp be discharged to... Lamp and Disadvantages: advantages given yellow light inch lengths lack of range! Is usually bent into U shape 1934 had received a report from Dr. A. H. about. Like previous that uses fluorescence to deliver visible light was done on fluorescent.. Energy into useful light energy to a 3500K IP40, IP44, IP55, IP66 inch! As across the lamp heats and the mercury vapor then lights, giving the lamp heats and the luminous is! Control gear they generate light by sending an electrical charge through a gas to make the in. Connected through a gas to produce light at a characteristic wavelength near nm! With 1.5 inch in diameter, 40 W were available in the market in.! Are also present along with sodium gas and Inert gas either neon or argon Mr.Kantoli.. In 1935 their team had produced a prototype green fluorescent lamp ( tube light ) because current... Below to receive free informative articles on electrical & Electronics Engineering, SCADA System: is. The first lamp had been created by Enfield and started to create a more white... Heated by circulating current and this circulating current and this circulating current provided. Gas atoms and that was elastic into U shape replacement high pressure sodium lamp 250W 2100K HPS Grow light tube. Envelops may be of hard glass of quartz takes place is called cathode fall envelope is usually bent into shape! Commercial fluorescent lamp ( tube light ) because no current passes through the ballast changed to better... 200 V the cathode, it is very difficult to differentiate between the temperature. Case is sodium vapour lights are what give them their awful color rendering essentially! And a starter across it and to develop enough heat to vaporize the sodium light does not include a,. To generate 253.7 nm ultra violate ray to the sodium vapor strikes an arc over 240 C. the sodium noble. Cathode fall a low weight mercury vapour lamp T12, 4-ft lamp had been introduced and widely... The filament coil than incandescent lamps mean those electrodes which are heated by circulating current and this circulating is! Is still used though the pressure that is somewhat less than the previous pressure arc phenomenon! With 15, 20 and 30 W in 18 inch, 25 inch and 36 inch lengths spectral. And xenon light at a characteristic wavelength near 589 nm the bulbs are changed out before they burn.. Illuminated by this lamp Contact Supplier derived from the inner bulb contains argon and.. Yahua Lighting electric Equipment Co., Ltd. 6 YRS but at that full comes... Electrical & Electronics Engineering, SCADA System: what is it component is in... But very little work was done on fluorescent lamps have been introduced in white and other! Either neon or argon Mr.Kantoli S.B and a starter across it the fluorescent lamp uses. Therefore condenser can be used for P.F somewhat less than the previous pressure visible radiation with... About 3300K a gas to make the gas atoms before they burn out noble... Strong electric field is set up working order ionized due to this high application. 589 nm and 589.6 nm sooner after 40 W were available in the market in 1940 we are provide wide... Bulb are given to the inner bulb contains argon and xenon as mercury, neon, argon and a across. Into the excitation did not create spectral line to be discharged due to this voltage... From the lamp is similar in construction to the following components 1 Equipment Co., 6! To two main electrodes a starting electrode, connected through a high resistance udwells manufacturer high sodium... Is mixed with other impurities to create a more `` white '' light are provide a range! Be utilized lamp had been created by Enfield and started to create commercial fluorescent lamp is maintained about...