A Low-Pressure Sodium Vapor lamp (or LPSV lamp) is termed as a “miscellaneous discharge lamp” as it possesses some characteristics of High-Intensity Discharge (HID) lamps as well as it resembles fluorescent lamps in other areas. Put them in a sealed plastic bag and take it to your local waste facilities for recycling. In addition, the heat insulating sleeve of the present invention will not drop off the tube and will not peel off as is common with conventional sleeves. The most important observations were that Sodium vapor pressure at 50 Hz is about twice times its value at high frequency but the temperature is the same. As an example 0.5 g of NaN3 was dissolved in 100 ml of methyl alcohol, and 0.04 ml of the resulting solution was used for one 400 Watt arc tube. Referring now to FIG. The other exhaust pipe 3' was connected to an exhaust system (not shown) to evacuate the space within the arc tube. Review Rating. The xenon gas which is easily ionized, facilitates striking the arc when voltage is applied across the electrodes. But afterward, some improvements made this lamp with 50000 initial lumens with 24000 hours at 10 hours per start. BRIEF DESCRIPTION OF THE PREFERRED EMBODIMENT. The quantity of sodium is, preferably, 0.007 to 0.054 mg for every cubic centimeter, because the efficiency is unacceptably low for smaller quantities and the durability of the arc tube is reduced for larger quantities of sodium. High luminous efficacy. High Pressure Sodium lamp with clear tubular outer bulb. For this purpose, the thermal conditions within the arc tube must be regulated. High-pressure sodium (HPS) lamps are smaller and contain additional elements such as mercury, and produce a dark pink glow when first struck, and an intense pinkish orange light when warmed. FIG. (2NaN3➝2Na + 3N2) Thus, 0.07 mg of Na was generated from 0.2 mg of NaN3, and the simultaneously generated free N2 was exhausted through the exhaust pipe 3'. This implies that longer lamp life time can be realized with high frequency operation. Benefits. A localized version is available for you. Better efficiency, life and size are few of the advantages of HPS Lamp over LPS Lamp. The arc tube consists of frame and is highly pressured with sodium for better efficiency. SON-T The lamp voltage Vsa under unsaturated vapor pressure varies depending on the quantity of sodium and mercury in the arc tube. to. However, for increases of the lamp current above the point C, the lamp voltage does not increase and is maintained substantially constant. The heat insulating sleeve is thus held onto the arc tube. Applications. FIG. SON-T 1000W E40 1SL/4 Features. 2. Dimming possible with dedicated gear . Metal plates are tightly wound around the packing materials to hold the sleeves on the tube without any securing means. High Pressure Sodium Vapor (HPS) lights are a specific type of gas-discharge light (also known as a High Intensity Discharge, HID or arc light). $400 - $500 + See All. High-Pressure Sodium-Vapor Lamps. The popularity of that technology is not just due to its energy efficiency. The sodium and mercury thus obtained were vaporized to escape from the exhaust pipe 3, but were condensed within the arc tube by keeping the arc tube cool during the process. Basically, an LPSV lamp is a gas discharge lamp that uses sodium in an excited state to produce light. Verified Supplier. High pressure sodium vapor lamps, which constitute one known type of saturated vapor pressure electric discharge lamps, are known in the art. The latter alloy can be obtained in the form of a powder molded piece, and separates mercury therefrom at a predetermined rate when heated up to 700° C. The thermal decomposition reaction of the alloy is also obtainable within the arc tube so that a specific predetermined amount of mercury may be entered into the tube. The filler container 8 may be of a heat resistant material, such as stainless steel, formed in a tumbler like shape or an elongated tubular shape with one end being closed. Thereafter, 10 mg of Mercury Dispenser, consisting of the Al-Zr-Ti-Hg alloy, was placed into the container 8 to form a mixture 9 with NaN3. $150 - $200. die Quecksilberhochdrucklampe Pl. © 2004-2020 FreePatentsOnline.com. Metal Halide. Price. The metal bands 6, 6' may be of a thin plate of a heat resistant metal such as nickel, molybdenium, tantalum or stainless steel. The striking feature of sodium-vapor lamps is their radiation dominated by the emission of two resonance lines at 589/590 nm. Do not use a vacuum cleaner. As a suitable solvent for sodium azide (NaN3), methyl alcohol is preferably used for convenience of the succeeding drying process although sodium azide is also soluble in water. The most preferable quantities of sodium and mercury to obtain high efficiency as well as life durability are within the range 0.007 mg to 0.018 mg and 0.1 mg to 0.6 mg, respectively, for every cubic centimeter of the tube volume. In a high pressure sodium vapor lamp, sufficiently small quantities of sodium and mercury are inserted therein so that all of the added sodium and mercury will be vaporized when the lamp is operated. Mercury Vapor. At the same time, it is very difficult to form a very small drop of mercury on an industrial scale, since mercury has a large surface tension and a large specific gravity. 4, the lamp current versus lamp voltage is shown for a conventional 400 watt high pressure sodium vapor lamp and for a 400 watt lamp made as described above. Luminous Flux: 232 lm. 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