There are two types of sodium lamps lowpressure lps highpressure son. The sodium is mixed with other impurities to create a more white light. The effect of high pressure sodium vapor lamps on the rat. High pressure sodium lights hps are another light in the highintensity discharge hid family, along with mercury vapour and metal halide lamps. 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. Sodium vapor lamp is the most energy efficient of all other lamps because it uses all its current to produce yellow light. Sodium lamp performance is directly related to the gas pressure inside the arc cylinder. See the photos lower on this page for more details. Hps lamps give a whiter light and are used for extrabright lighting in. If you have issues viewing or accessing this file contact us at ncjrs. 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. A highpressure sodiumvapor lamp a sodiumvapor lamp is a gasdischarge lamp that uses sodium in an excited state to produce light at a characteristic wavelength near 589 nm. Comparing the rated life of metal halide and high pressure sodium sources by david m. Product information high pressure and specification.
The arc then heats up the mercury and the mercury vapor then lights, giving the lamp a bluish color. Pdf electronic ballast for high pressure sodium lamps without. Highpressure sodiumvapour 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. Find details of companies offering high pressure sodium lamp at best price.
An amalgam of metallic sodium and mercury lies at the coolest part of the lamp and provides the sodium and mercury vapor in which the arc is drawn. The mercury lamp had been in existence for nearly twenty years but sodium also made a logical material for a vapour lamp, quite. The wattage of the highpressure sodium vapour lamps. The origin of the sodium vapour lamp may be traced back to a 1919 patent taken out by arthur h. In addition, the large physical size of the lamp means that it has a low surface luminance so it is less likely to give rise to glare, and the low operating.
This leads to visual fatigue and confusion when working with coloured wires, safety plaques, liquids, objects or smoke. E27e40 high pressure sodium vapor bulb, european standard. In some versions, fluorescent powder is applied that converts the ultraviolet part, which is emitted together with visible light, into visible light to improve the color. Dispose of in accordance with federal, state and local requirements. 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. The lamp heats and the sodium is the last material to vaporize.
The manufacturer of the highpressure sodium vapour lamps. Standard high pressure sodium lamp, elliptical bulb coated, base e27, operation with ballast, no ignitor required. The xenon gas which is easily ionized, facilitates striking the arc when voltage is applied across the electrodes. Over any specific group of lamps, some will fail sooner than others, while some may keep. High pressure sodium lamps shall have a mogul base, a 24 000 average rated life hours at 10 hours per start, and a lamp burning position as required by the luminaire and lamp manufacturers. Producing a yelloworange light, hps lamps are most commonly used for indoor gardening, as the light they produce encourages plant growth. High pressure vapour lamps electronic ignitors high. The avoid shell of the sonlamps is internally coated with aluminum oxide powder. This test is used to determine if an item can be managed as hazardous. If a lamp breaks, ventilate the room for 30 minutes and remove the parts, preferably with gloves.
Lumalux super and sox lamp ratings are based on measurements at constant input voltage. About 5% of these are high pressure sodium lamps, 5% are starters, and 3% are ballasts. A lamp breaking is extremely unlikely to have any impact on your health. Comparing the rated life of metal halide and high pressure. Lowpressure sodiumvapour lamp instrument britannica. Other articles where lowpressure sodiumvapour lamp is discussed. Pdf high pressure sodium vapor lamps due to long service life high light, as the most comprehensive street lighting and industrial lighting whose use. Electronic ballast for high pressure sodium lamps without acoustic resonance via controlled harmonic injection synthesized with pwm.
Comparative study of 250 w high pressure sodium lamp. We also offer special conversion metal halide bulbs that can be used with fixtures intended for high pressure sodium light bulbs. The mercury vapor raises the gas pressure and operating. An example value being to bs en 60662 and bs en 62035. High pressure sodium lamps are the most efficient artificial white light source with about 29% of the energy used by the lamp producing light. Philips 400watt ed18 high pressure sodium hid light bulb 1bulb.
Standard lumalux standard lumalux lamps are known for high efficacy, long life, and reliability. Traditional light sources such as mercury vapour, high pressure sodium hps and low pressure sodium lps have poor spectral content and colour rendering. Other materials and gases are used to help start the lamp or control its color. Due to the long life, efficient energy usage and good vision, sodium vapor lamps are used for street lighting. All credits and sources are located at the bottom of each lighting page. A wide variety of ignitor for high pressure sodium lamp options are available to you, such as bulb type, application, and certification. Venture offersquality hps lamps that operate on our matching hps basllasts. Increasing arc tube pressure improves the colour appearance of reds, blues, and greens. Sodium vapor lamps are some of the most efficient lamps in the world.
The effect of high pressure sodium vapor lamps and daylightsimulating fluorescent lights on the growth, hematology, and behavior of spraguedawley rats has been investigated. Low pressure sodium light has a number of very unique properties arising from its spectral output, many of which make it technically the most suitable light source for road lighting and these are covered in detail on the next page. Lamps are available from 35 to 150 watts in medium base and 50 to. A sodium vapor lamp is a lamp that uses sodium to create light. Replacing mercury vapor or incandescent sources with metal halide or high pressure sodium will generally. Low pressure and high pressure sodium vapour lamp gktoday. In a high pressure sodium lamp, a compact arc tube contains a mixture of xenon, sodium and mercury. The high pressure sodium hid bulbs available at supply parking lots, construction sites, gymnasiums, and warehouses with a high intensity, yellowtoned light. Solars lighting is e40 high pressure sodium bulb maker in china. A sodiumvapor lamp is a gasdischarge lamp that uses sodium in an excited state to produce light at a characteristic wavelength near 589 nm. To address the energy waste in this practice a twolevel ballast is available for high pressure sodium lamps. This file is licensed under the creative commons attributionshare alike 2. There is no doubt that this was a grow room, but that is a matter for the police and maybe also for the insurance company. The birns corona is based on proven birns nuclear lighting technology and hid high pressure sodium vapor lamps.
Highpressure sodiumvapour lamp instrument britannica. The lamp works by creating an electric arc through vaporized sodium metal. The failure of a lamp occurs when it will no longer start or keep burning. The yellowred band on the left is the atomic sodium dline emission. Pdf this paper presents a study and analysis of a electronic ballast for high pressure. Pdf click on the lamp product number to view detailed lamp specifications. Highpressure sodium vapour lamps bim object definition. Characteristics and features everything about blood pressure and its measurement. The construction and applications of sodium vapour lamps. All high pressure sodium lamps contain some amount of mercury. We found water tanks, pumps, rcds, fans, growing medium and even the finished product.
High pressure sodium lamp long run 4y, tubular bulb clear, base e40. In high pressure discharging lamps, lamp exhibits negative impedance. Lamp that produces light as a result of an electrical discharge, generated between two electrodes, in a highpressure mercury vapor that is contained in a transparent bulb. They have an efficiency of up to 190 lumens per watt compared to an incandescent street lamp which has between 15 and 19 lumens per watt. Super high pressure sodium lamps 10% more lumen efficiency than regular sodium lamps, long life more than 4 years under a regular burning point, long life save great cost of maintenance, burning with powershift sodium lamp ballast and lighting controlling system takes flexible lighting effect, suitable for special requirement road lighting. This second edition cancels and replaces the first edition published in 1980 and its amendments.
It uses mercury and sodium vapor combined to create a yellowpink light. The bridgelux olm series is a highly innovative integrated subsystem that delivers world class performance and meaningful cost advantages while reducing time to market, eliminating significant research and development costs, and improving manufacturing lead times. Occupancy sensors control the switching and when an area is vacant the lamps drop to about 30% of the power used at full brightness. 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. The operation of a highpressure sodium lamp is illustrated in the diagram on the right. Put them in a sealed plastic bag and take it to your local waste facilities for recycling. This is an electric discharge lamp for use only with proper auxiliary equipment, compatible with electrical specifications e. The strong structure of our product helps to provide a good antivibration and shock absorption performance. Contains easytounderstand explanations and examples for commercial and industrial energy technologies. The arc tube of this lamp contains sodium and mercury. Hps lamps have a very low cri, but a high lumen per wattage. Olm series is designed to replace the prolific high pressure sodium hps lamp, which has become the standard lighting source.
High pressure metal halide lamps high pressure sodium. Rats weaned under the sodium vapor lamps had slightly heavier adrenals than those exposed to the daylight lamps when the two lighting systems were equalized either for. When a high pressure sodium lamp is to be disposed, it is subject to the current epa toxicity characteristic leaching procedure tclp disposal criteria. A wide variety of high pressure sodium lamp options are available to you, such as bulb type, application, and certification. En 60662 high pressure sodium vapour lamps en 60192 low pressure sodium vapour lamps to be noted that all these lamp standards must be implemented with the technical data for the correct working with electronic ballasts 7 applications hid lamps are used in very different field of applications. Less than 1% of the mercury in a highpressuresodium lamp is in vapor. High pressure sodium bulbs hps are available in either medium or mogul base options and are ideal for replacing existing lamps or adding to a new lighting system to bring high intensity discharge hid lighting to indoor or outdoor applications. Clients can avail these lamps in pleasant colors and different light emitting capacities. High pressure sodium lamp with clear tubular outer bulb. It can come in a high pressure or low pressure format. The rated life of light sources is a measurement of the average hours of use for a lamp. This is the main difficulty of producing high pressure sodium lamp 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.
Pdf modeling and checking the power quality of high pressure. From this starting point the lamps can come up to full brightness in less than a minute. When current passes between the electrodes, it ionizes the neon and argon, giving a. High pressure lamps have more components than low pressure and contain other substances such as mercury. Venture lightings high pressure sodium lamps hps lamps. High pressure sodium vapour lamps with a polycrystalline translucent aluminum oxide discharge tube enclosed in an ovoid or tubular outer glass envelope. Street lighting technology c et lighting technology comparison.
They are commonly used in public parking lots, roadways, and other security areas. High pressure sodium lamps or hps lamps electrical4u. Highpressure sodium vapour lamps performance specifications iec 60662. The lamp produces a clarity of light that creates vivid color from objects illuminated by it. This was the first light source which radiated the characteristic deep yellow sodium resonance lines compton, 1919. Lowpressure sodium lamps are one of the most efficacious light sources. A lowpressure sodiumvapour 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. High pressure sodium lamps university of edinburgh. Other articles where highpressure sodiumvapour lamp is discussed. If outer glass bulb is broken, shut off power immediately and remove lamp after it has cooled. Highpressure 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. Click on the icon to the right to download the latest version of adobe. About 28% of these are high pressure sodium lamps, 0% are metal halide lamps, and 29% are ballasts.
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