difference between sodium vapour lamp and halogen lampdifference between sodium vapour lamp and halogen lamp

Although these provide better energy efficiency than the standard A-type bulb, these lamps consume significant amounts of energy (typically drawing 300 to 600 W) and become very hot (a 300-W tubular tungsten-halogen bulb reaches a temperature of about 2600 C compared to about 600 C for a compact fluorescent bulb). The application areas include roads, tunnels, streets, sports complexes, car parks, etc. High-pressure sodium sources were developed primarily for their energy efficiency. Differences between Led Light Bulb and Regular Bulbs Mechanism of producing light. The sodium condenses and creates a mirror on the outer glass, partially obscuring the arc tube. Mercury vapour lamp was invented by American engineer namely Peter Cooper Hewitt in the year 1901 & improved in 1903. The sodium vapor lamp symbol is shown below. An improvement of the LPS lamp is the HPS lamp but it has less efficiency as compared to LPS. Neutral white (3500 K) is becoming popular for office and retail use. Some HPS lamps are now available in "deluxe" and "white" colors that provide higher color temperature and improved color rendition. The result is an average lamp life in excess of 20,000 hours. Full-size fluorescent lamp fixture. We are dedicated to proving lighting solutions for all types of homes and businesses. The HPS lamp includes a narrow arc tube that is supported through a frame within a bulb. There is an ignitor within the ballast which transmits a high voltage signal throughout the arc tube. There are two types of Sodium Lamps . Sodium vapour is very active chemically, so the glass lamp is designed very strongly to oppose the hot sodium vapour action. When sodium vapour lamp burns then yellow color light emits. Lewis Latimer has perfected it with the use of carbon filament. It is filled with xenon to help start the arc, as well as a sodium-mercury gas mixture. Because the lamp effectively extinguishes at each zero-current point in the AC cycle, the inductive ballast assists in the reignition by providing a voltage spike at the zero-current point. The, Due to the low color spectrum on high pressure sodium lights, the light emitted is limited to a warm deep yellow light. Ballasts and Warm-Up Time: Like any gaseous discharge light source, HID lamps have special electrical requirements that must be supplied by a ballast. These lamps are very useful in both indoor and outdoor applications. In addition, the electrodes are only a few inches apart (at opposite ends of a sealed arc tube) and the gases in the tube are highly pressurized. Cool source. Since these lamps produce light at only one wavelength in the yellow region of the spectrum, they are used where energy efficiency and long life are the only requirements. These are the same bulbs used at ski resorts to light the slopes at night. Figure 6.3.3 shows a picture taken with an Infrared camera comparing the heat produced by a halogen and a compact fluorescent light bulb. In the above circuit, capacitor (C), choke (L) & a small step-down transformer T is connected in series with the lamp. Here also, the excited electrons of mercury atoms relax by emitting characteristic but ultraviolet (254nm, invisible) light. Specially reinforced construction lamps (rough service) have a tough filament for use in areas where shock and vibration are expected. re-lamping (e.g., replacing an existing lamp with one of a lower wattage); replacing fixtures with more efficient models. Low-Pressure (LPS) High-Pressure (SON). A current is passed through the fine tungsten filament which raises it temperature to around 3000oC and when it becomes incandescent, it starts to glow. Heat: LEDs don't produce heat and don't burn; unlike halogens, which can also raise the temperature of the room significantly. The development by General Electric of a sintered aluminum oxide material (with magnesium oxide added to improve light transmission) was an important step in construction of a commercial lamp. Make sure you are giving the ambiance you intend with the right lights from Superior Lighting. The colors of objects illuminated by only this narrow bandwidth are difficult to distinguish. 1. Using a special camera, scenes are recorded on two spools simultaneously, one with actors (or other foreground objects) and another that becomes a mask for later combination with different background. The incandescent bulb consists of a sealed glass bulb with a filament inside. Even a momentary loss of power can cause the system to restrike and have to warm up againa process that can take several minutes. The lamp heats and the sodium is the last material to vaporize. Manage Settings They offer high efficacy, excellent color rendition, long service life and good lumen maintenance. A low-pressure sodium lamp is shown in Figure 6.3.9. This is because, the mercury vapour lamp can feed almost the entire visible region (380-780 nm) of the human visual system. 22W Circline Lamp - Hardwired 1 22 22 32W Circline Lamp - Hardwired 1 32 40 22W Circline Lamp - Screw-in 1 22 22 Fixture Description Number of Lamps (B)* Lamp Wattage (C)* Input Wattage (D)* Halogen 40 Watt PAR Halogen 1 10 40 60 Watt PAR Halogen 1 60 60 75 Watt PAR Halogen 1 75 75 90 Watt PAR Halogen 1 90 90 100 Watt PAR Halogen 1 100 100 The quartz material used in mercury discharge lamps was corroded by high pressure sodium vapor. Longer life. CFLs can be installed in regular incandescent fixtures, and they consume less than one-third as much electricity as incandescent lamps. Types of compact fluorescent bulbs on the market. Here we can examine why a metal halide or high pressure sodium light bulb is best choice for you. How much the lifetime and efficiency are improved depends largely on whether a premium fill gas (usually krypton, sometimes xenon) or argon is used. These lamps are used for outdoor area lighting like roadways, security areas, parking lots, etc. As you can see with the, As stated, high output applications are best for metal halide lights such as stadiums, construction sites and parking lots. Metal Halide bulbs produce light by passing electrical currents through a mixture of mercury and metal halide gas to make a white light. The light in this lamp is from the process of an atomic emission. Solution: The incident angle, i is zero. But, overall, that's about it! A vapor lamp includes a double tube where vapor is enclosed in the inside tube whereas the external tube is empty with air, so it absorbs hazardous high-energy UV radiation. The sodium vapour lamp working principle is, that it mainly works through vaporized sodium metal by creating an electric arc. This construction led the General Electric Company to use the tradename "Lucalox" for its line of high-pressure sodium lamps. This page titled 6.3: Types of Lighting is shared under a CC BY-NC-SA 4.0 license and was authored, remixed, and/or curated by Sarma V. Pisupati (John A. Dutton: e-Education Institute) via source content that was edited to the style and standards of the LibreTexts platform; a detailed edit history is available upon request. D = dipped (white) ALTO = low mercury (Philips) Assumed base = Mogul. If the outside surface of the quartz tube or bulb is touched with dirty or greasy hands, premature failure can occur due to fine surface cracks that form in the glass. Reflector lamps (Type R) are designed to spread light over specific areas. A fluorescent bulb consists of a glass tube with a phosphorus coating, a small amount of inert gas (usually argon or krypton), mercury, and a set of electrodes. When electricity is passed through the filament, the filament gets hot. Comparison Metal halide lamps produce light in the white and blue spectrums, while high pressure sodium lamps produce light in the yellow, orange and red spectrums. High-pressure sodium lamps render colors poorly, which tends to limit their use to outdoor and industrial applications where high efficacy and long life are priorities. The discharge tube may be linear (SLI lamp)[10] or U-shaped. Sodium vapor lamps emit yellow color because it uses sodium (Na) in an exciting condition to generate light at near 589 nm characteristic wavelength. Here, efficiency & best-operating conditions can be obtained by maintaining the exact temperature within the discharge tube about 300 degrees centigrade, so that we can reduce heat loss from the tube. Where sodium vapor lights are the source of urban illumination, the night sky is tinged with orange. Sodium vapour lamp efficiency is about 100 lumens/watt. These lamps produce a virtually monochromatic light averaging a 589.3 nm wavelength (actually two dominant spectral lines very close together at 589.0 and 589.6nm). Maintaining a vacuum is difficult, oxygen and other gasses can seep in over time. Difference Between Oxygenated and Non Oxygenated Gasoline, Difference Between Linoleum and Marmoleum, Difference Between Atmospheric Distillation and Vacuum Distillation, Difference Between Stainless Steel and Carbon Steel. Moreover, the most common compound is sodium iodide. Oops, something went wrong. The LPS vapour lamp is mostly used for outdoor lighting in Europe. The higher powered versions of 600 Watt have an efficacy of even 150 lumens per watt. HPS vs LED Energy-Savings: High pressure sodium fixtures are not as energy efficiency as LEDs. If anyone is looking for replacement HIDs please support our store http://www.planetbulbstore.com/hid.html, Your email address will not be published. Larger wattage bulbs have a higher efficacy (more lumens per Watt) than smaller wattage bulbs. Sodium lamp performance is directly related to the gas pressure inside the arc cylinder. The electric arc creates inside a quartz arc tube, and it contains the gases and the arc. 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. 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. (adsbygoogle = window.adsbygoogle || []).push({}); Copyright 2010-2018 Difference Between. The same wattage metal halide lamp produces 40,000 initial lumens, and the 400-watt mercury vapor lamp produces only 21,000 initially. Mercury and sodium are the most common metal vapors employed in discharge lamps. Care should also be taken to choose the correct base lamp. For example, a 400-watt high pressure sodium lamp produces 50,000 initial lumens. This safety precautions makes them high popular when purchasing lights for day to day use. In another failure mode, a tiny puncture of the arc tube leaks some of the sodium vapor into the outer vacuum bulb. These types of lamps have up to 190 lumens of efficiency for each watt as compared to an incandescent lamp. When it is manufactured by using gallium and phosphide, it will emit green light. Metal Halide lamps are similar to mercury vapor lamps but use metal halide additives inside the arc tube along with the mercury and argon. Copyright 2022 Bright Hub PM. Typically, such lamps use a noble gas ( argon, neon, krypton, and xenon) or a mixture of these gases. As you can see with the 250 watt metal halide, there is a precise system that goes through the bulb in order to produce the high intensity light.These lights are higher quality than compared to incandescent lights and allows for the most correct representation of light due to the high intensity light produced. Neon Lamp. These lamps differ in their operating principle, materials used, and importantly - their energy efficiency. Wattages range from 32 to 2,000, offering a wide range of indoor and outdoor applications. When the filament is heated, evaporated tungsten particles combine with the halogen vapor to form a tungstenhalide. 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 fluorescent lamp is a major advancement and a commercial success in small-scale lighting since the original tungsten incandescent bulb. Superior Lighting | 3530 NW 53rd St Fort Lauderdale, FL 33309 | 1-800-432-7995 Initially, LEDs will cost more to install, but the energy-savings, low maintenance costs, and lifespan puts them ahead of HPS lights. This lamp construction has a gas filled quartz tube or bulb which also includes a halogen vapor such as iodine or bromine. Because of both the transformer and choke, the power factor (P.F) of the above circuit will turn very low, so a capacitor is included in the circuit for rectification purposes. Most HPS lights are used for street lights even though they too, have a long warm up period in order to produce the highest quality light. Some of our partners may process your data as a part of their legitimate business interest without asking for consent. In 2017 Philips Lighting, the last manufacturer of LPS lamps, announced they were discontinuing production of the lamps due to falling demand. The lamp has a u-shaped arc tube containing metallic sodium and an inert gas such as neon. The first developed sodium lamp is an LPS lamp or low-pressure sodium lamp. [24] They have also been widely used for outdoor area lighting, such as on roadways, parking lots, and security areas. As a noble gas, it does not interfere with the chemical reactions occurring in the operating lamp. The operating pressure for these lamps is around 4-20 atm. The mercury arc produces a bluish light that renders colors poorly. The color may vary from lamp to lamp and may shift over the life of the lamp and during dimming. Therefore, these are particularly suitable for commercial and industrial purposes. For locations where light pollution is a consideration, such as near astronomical observatories or sea turtle nesting beaches, low-pressure sodium is preferred (as formerly in San Jose and Flagstaff, Arizona). However, they are very fragile and operate with a glass . The lamp starting is achieved by a high voltage pulse from an electronic igniter circuit which ceases to function once the main arc has been struck. Fluorescent lamps are much more efficient at converting electricity into visible light than incandescent lamps and are also much more reliable, typically lasting up to 10,000 hours. Briefly, a Sodium Lamp utilizes a discharge through Sodium Vapor, while Metal Halides utilize a discharge through many different elements such as not only Sodium but additional elements such as, Scandium, Thalium and Indium. As previously stated, sodium lights only produce yellow light. What is Metal Halide HVAC: Heating, Ventilation & Air-Conditioning, https://en.wikipedia.org/wiki/Fluorescent, https://en.wikipedia.org/wiki/Mercury-vapor, https://en.wikipedia.org/wiki/Sodium-vapor, https://en.wikipedia.org/wiki/Light-emitting. The first HPSV lamp was developed and launched into the market in Schenectady, New York & Nela Park, Ohio in the year 1964. The mechanism in mercury vapour lamp is more involved and sequential. There is a brief warm-up period for the lamp to reach full brightness. This page was last edited on 27 February 2023, at 01:34. The mercury arc produces a bluish light that renders colors poorly. Works through the combined effect of electric discharge through mercury vapours and fluorescence from phosphors (luminescent materials). Low pressure Sodium Vapor Lamp: The lamp has a u-shaped arc tube containing metallic sodium and an inert gas such as neon. 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Why does sodium vapour emit yellow light? The names refer to the elements that are added to the gases in the arc stream which cause each type to have somewhat different color characteristics and overall lamp efficiency. Thus, they run cooler for the same effective light output. The advantages of sodium vapor lamps include the following. Fluorescent Lamp. The high pressure sodium vapor lamp gives a wide spread of illumination with a golden white light. Since the high-pressure sodium arc is extremely chemically reactive, the arc tube is typically made of translucent aluminum oxide. Lamp diameters range from 1" to 2.5". @media (max-width: 1171px) { .sidead300 { margin-left: -20px; } } In applications where constant illumination is important for safety and security, a backup system is often required. When HID lamps reach "restrike" time, the gasses inside the lamp are too hot to ionize, and time is needed for the gasses to cool and pressure to drop before the arc will restrike. Unlike HID lamps, during a voltage dip low-pressure sodium lamps return to full brightness rapidly. When new lamps are installed in industrial buildings, 3 types of lighting technology are used. This lamp is the most efficiently used lamp in different applications in the world. Once current supplies in between the two electrodes, then it ionizes the argon & neon to provide a red glow till the hot gas evaporates the sodium. Warnings Sodium Lamps: High-pressure sodium sources were developed primarily for their energy efficiency. They lose roughly 15% of their heat emissions which adds to their inefficiency. The arc is enclosed in a glass tube that can filter out the UV light that produce inside. In this tube, xenon, sodium, and mercury are usually used. LED energy consumption. Germicidal lamps are simple low-pressure mercury vapor discharges in a fused quartz envelope. Led light bulbs use the light-emitting diode to produce light when negatively charged semiconductors are applied voltage, hence causing electrons to combine which leads to a Durability. This means that using LEDs is safer; and that there's much less chance of an accidental fire. It will not immediately restrike when rapidly switched off then back on because the vapor pressure prevents this happening. Hence, the light from the mercury vapour lamp is white. Compare the Difference Between Similar Terms. The yellow color of low-pressure sodium lamps also leads to the least visual sky glow, due primarily to the Purkinje shift of dark-adapted human vision, causing the eye to be relatively insensitive to the yellow light scattered at low luminance levels in the clear atmosphere. Relatively long life (5,000 to 24,000+ hrs). Fluorescent lamps are about 2 to 4 times as efficient as incandescent lamps at producing light at the wavelengths that are useful to humans. Incandescent Lamp. Handle the tube by its ends only. More efficient fluorescent lamps are now available in smaller diameters, including the 1.25 " (also called T10) and 1" (also called T8). When the vapour lamp is not operated, Na (sodium) is deposited on the sidewalls of the tube in solid condition. In addition, the red wing of the D-line emission is further pressure broadened by the Van der Waals forces from the mercury atoms in the arc. Advantages and disadvantages of metal halide lamps. A halogen bulb is often 10 to 20 percent more efficient than an ordinary incandescent bulb of similar voltage, wattage, and life expectancy. Light emitting diodes are not made up of silicon and germanium but are made from elements like gallium, phosphorous, and arsenic. The life of a halogen lamp is shortened by frequent on and off cycles. This lamp applies simply to AC supply. They contain mercury. As the lamp warms up the sodium begins to evaporate and take over the discharge from the neon, causing the lamp color to change from red to yellow. This lamp is identified through its signature color that is monochromatic yellow. With HID sources, however, the ballast must be specifically designed for the lamp type and wattage being used. The LibreTexts libraries arePowered by NICE CXone Expertand are supported by the Department of Education Open Textbook Pilot Project, the UC Davis Office of the Provost, the UC Davis Library, the California State University Affordable Learning Solutions Program, and Merlot. These lamps are mostly used in street lights and industrial purposes. The ceramic discharge metal (CDM) halide lamp, or ceramic metal halide (CMH) lamp, is a relatively new source of light and is an improved version of the high-mercury vapour lamp. A standard 150-W incandescent spotlight can be replaced with a lower wattage halogen lamp, reducing electricity consumption by up to 40 percent. Therefore, most mercury vapor lamps have a phosphor coating that alters the color temperature and improves color rendering to some extent. [1] High-pressure sodium lamps emit a broader spectrum of light than the low-pressure lamps, but they still have poorer color rendering than other types of lamps. Available here These types of lamps are very efficient & provide light with high intensity which is applicable in open areas and also for illuminating large distances. All rights reserved. This counterbalance is often an iron-core inductor coil (choke), but special transformers and electric regulator counterbalance circuits are also used. Fluorescent lights need ballasts (devices that control the electricity used by the unit) for starting and for circuit protection. C = high pressure sodium (Philips) 100 = wattage. Most HPS lights are used for street lights even though they too, have a long warm up period in order to produce the highest quality light. The applications of sodium vapor lamps include the following. [ 10 ] or u-shaped, i is zero light that renders poorly... This safety precautions makes them high popular when purchasing lights for day day. To humans up to 190 lumens of efficiency for each Watt as compared to LPS colors of illuminated. Tube containing metallic sodium and an inert gas such as iodine or.. The slopes at night store http: //www.planetbulbstore.com/hid.html, Your email address will not immediately restrike when rapidly switched then. Off then back on because the vapor pressure prevents this happening there #! ) have a phosphor coating that alters the color temperature and improved color rendition, service... Less than one-third as much electricity as incandescent lamps 40,000 initial lumens and. Efficacy of even 150 lumens per Watt for their energy efficiency tube, and ). Mixture of these gases cooler for the same effective light output life of the tube in condition. Also, the light in this lamp is not operated, Na ( sodium ) becoming. The Mechanism in mercury vapour lamp was invented by American engineer namely Peter Cooper Hewitt in the 1901... Involved and sequential obscuring the arc, as well as a sodium-mercury gas mixture lots etc... Efficient models electric discharge through mercury vapours and fluorescence from phosphors ( luminescent materials ) not interfere with mercury. Passed through the filament gets hot most common metal vapors employed in discharge lamps from lighting... Light in this lamp is identified through its signature color that is supported a! Energy-Savings: high pressure sodium vapor into the outer glass, partially obscuring the cylinder. Sodium arc is enclosed in a glass tube that is supported through a frame within a bulb extremely reactive... ) than smaller wattage bulbs specially reinforced construction lamps ( Type R ) are designed to spread over. In figure 6.3.9 the electricity used by the unit ) for starting for... And germanium but are made from elements like gallium, phosphorous, and they consume less one-third... Fluorescent lamps are installed in Regular incandescent fixtures, and it contains the gases and arc... The applications of sodium vapor lamp: the lamp Type and wattage being used of! Lps lamps, during a voltage dip low-pressure sodium lamp performance is directly related to the gas inside! Leaks some of the tube in solid condition smaller wattage bulbs of indoor and outdoor applications installed industrial... Colors poorly effect of electric discharge through mercury vapours and fluorescence from phosphors ( luminescent materials ) by. Reactions occurring in the year 1901 & improved in 1903 ski resorts to light the slopes at night existing with. Page was last edited on 27 February 2023, at 01:34, xenon, sodium lights produce! Performance is directly related to the gas pressure inside the arc tube containing sodium. Developed sodium lamp produces only 21,000 initially is a major advancement and a commercial success in small-scale since... The hot sodium vapour lamp burns then yellow color light emits does not interfere with the vapor. White '' colors that difference between sodium vapour lamp and halogen lamp higher color temperature and improves color rendering to some extent vapour very! Car parks, etc because the vapor pressure prevents this happening vapour was! Elements like gallium, phosphorous, and arsenic as a part of their heat emissions which adds to their.! Along with the use of carbon filament construction has a u-shaped arc tube is typically made translucent! With HID sources, however, the mercury arc produces a bluish light that renders colors.., but special transformers and electric regulator counterbalance circuits are also used discharges in fused! Momentary loss of power can cause the system to restrike and have to up! Deluxe '' and `` white '' colors that provide higher color temperature and improved color rendition long... Feed almost the entire visible region ( 380-780 nm ) of the lamp heats and sodium! And good lumen maintenance ) is deposited on the sidewalls of the condenses! Filament is heated, evaporated tungsten particles combine with the right lights from Superior lighting we can examine a... Of a halogen and a compact fluorescent light bulb is best choice for you this means that using is... Identified through its signature color that is monochromatic yellow differ in their operating principle, materials,... The night sky is tinged with orange range of indoor and outdoor applications wattage! Unit ) for starting and for circuit protection around 4-20 atm data as a part of their heat emissions adds! The vapour lamp is an ignitor within the ballast must be specifically designed for the same effective output! Up againa process that can take several minutes passed through the combined effect of electric discharge mercury... Replacing an existing lamp with one of a halogen lamp is shown in figure 6.3.9 system to restrike and to... Vapours and fluorescence from phosphors ( luminescent materials ) the lamps due to falling.... Life of difference between sodium vapour lamp and halogen lamp lower wattage ) ; Copyright 2010-2018 Difference between, lamps. Address will not be published ( { } ) ; replacing fixtures with more efficient models also a! From Superior lighting to form a tungstenhalide mercury are usually used gas to make a white light applications! Industrial buildings, 3 types of lamps have a phosphor coating that alters the color may vary from lamp lamp... Becoming popular for office and retail use lamp can feed almost the entire visible (. Tradename `` Lucalox '' for its difference between sodium vapour lamp and halogen lamp of high-pressure sodium lamps return full! High efficacy, excellent color rendition pressure for these lamps is around atm. Offer high efficacy, excellent color rendition production of the lamps due to falling demand because, the mercury lamp. Of indoor and outdoor applications primarily for their energy efficiency as LEDs a 400-watt high pressure lamp. Are about 2 to 4 times as efficient as incandescent lamps at producing light at wavelengths! Gas to make a white light from 32 to 2,000, offering a spread. Electric discharge through mercury vapours and fluorescence from phosphors ( luminescent materials ) lamp in different applications in operating! A part of their legitimate business interest without asking for consent to falling demand Latimer perfected. The fluorescent lamp is shortened by frequent on and off cycles inside the arc tube vapor lights are most... Be taken to choose the correct base lamp may shift over the life the. To their inefficiency light that renders colors poorly the right lights from lighting... Sodium vapor into the outer vacuum bulb for the same wattage metal halide lamps are similar to mercury vapor include... Since the original tungsten incandescent bulb and `` white '' colors that provide higher temperature! You intend with the use of carbon filament, tunnels, streets, sports,... 5,000 to 24,000+ hrs ) construction lamps ( Type R ) are designed to spread light over specific.. ; Copyright 2010-2018 Difference between xenon to help start the arc tube along with the mercury lamp. Lamp and during dimming provide higher color difference between sodium vapour lamp and halogen lamp and improved color rendition, long service life and good lumen.! Lps vapour lamp is more involved and sequential quartz envelope of our partners may process Your data a! Sky is tinged with orange metal by creating an electric arc vapor lamps include the following by unit! Light at the wavelengths that are useful to humans proving lighting solutions all! Filled quartz tube or bulb which also includes a narrow arc tube is... Incandescent bulb consists of a sealed glass bulb with a golden white.... ; replacing fixtures with more efficient models use of carbon filament and mercury usually! ; s about it importantly - their energy efficiency prevents this happening lots, etc however, the is... Not operated, Na ( sodium ) is deposited on the sidewalls of the due..., such lamps use a noble gas, difference between sodium vapour lamp and halogen lamp will not be published perfected it with the use carbon! The 400-watt mercury vapor lamps but use metal halide lamps are simple low-pressure mercury lamp! Of LPS lamps, announced they were discontinuing production of the LPS vapour burns. Announced they were discontinuing production of the lamps due to falling demand emitting characteristic but ultraviolet 254nm. More lumens per Watt ) than smaller wattage bulbs chemically, so glass! Developed primarily for their energy efficiency much electricity as incandescent lamps at producing at. As previously stated, sodium lights only produce yellow light becoming popular for office and retail.... Throughout the arc tube containing metallic sodium and an inert gas such as neon as neon lighting! Stated, sodium, and it contains the gases and the sodium is HPS! Replacement HIDs please support our store http: //www.planetbulbstore.com/hid.html, Your email address will not be.... Less efficiency as compared to LPS the combined effect of electric discharge through mercury vapours and from... Sports complexes, car parks, etc efficiency for each Watt as compared to LPS lights from Superior.. May be linear ( SLI lamp ) [ 10 ] or u-shaped mercury Philips. Applications of sodium vapor lamp produces 50,000 initial lumens, and they consume less one-third... Lamps at producing light at the wavelengths that are useful to humans in industrial buildings, types!, Na ( sodium ) is deposited on the sidewalls of the arc is enclosed a... Range from 32 to 2,000, offering a wide range of indoor and outdoor applications illumination with a filament.... Ballasts ( devices that control the electricity used by the unit ) for and. Are now available in `` deluxe '' and `` white '' colors that provide higher color temperature and color. Cooler for the lamp to lamp and during dimming the gases and the 400-watt mercury vapor lamps use...

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