In this case, however, a combination of factors shifts the wavelength of much of this energy to within the visible range, so light is produced without any phosphors. Required fields are marked *. (adsbygoogle = window.adsbygoogle || []).push({}); Copyright © 2010-2018 Difference Between. Metal halide lamps … 2. 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. @media (max-width: 1171px) { .sidead300 { margin-left: -20px; } } High-Pressure Sodium Screw-in Replacements. Metal halides are compounds composed of a metal ion chemically bonded to a halide. LED corn cob lights are one of the most efficient ways to replace metal halide, mercury vapor, and high-pressure sodium HID bulbs. These are the same bulbs used at ski resorts to light the slopes at night. 0 items Checkout. But, keep in mind that much of the light that the light meter is reading from a metal halide isn’t even visible. Because of their numerous advantages, metal halide lamps are used extensively in outdoor applications and in commercial interiors. If color is important, metal halide lamps are a good option. If you compare Metal Halide lights and LED lights, you’ll likely find that the metal halide lights have a higher foot-candle measurement, while the LEDs have a higher lumen output. In applications where constant illumination is important for safety and security, a backup system is often required. In a metal halide light, the electricity heats a metal filament to a high temperature creating an extremely bright light. Metal halide or multi vapor lamps are a form of the light source that creates light via passing an electric arc through a gaseous mixture of mercury vapor and vapor of some metal halides. Along with these gases, there is also the presence of certain metal halides such as sodium iodide. Their limited blue-green light spectrum has a lower CRI than metal halide. Fluorescent vs metal halide vs sodium vapor? I would think running two tubes in utility reflectors down the length of the garage would cover you. Available here, 1.’Closeup Metal Halide Lamp’By Dave H.Ozguy89 – Own work, (Public Domain) via Commons Wikimedia. In addition, HID lamps require a warm-up period to achieve full light output. Available here  Older fixtures/ballasts would not be likely to support the change in bulbs. No. They’ll start to turn a different color and look must duller than the newer bulbs and you’ll know it’s time to replace them. All of these bulbs are categorized as High Intensity Discharge (HID) because of their ability to put out an extreme amount of light. Metal Halide Lamps:  Metal halide lamps are among the most energy efficient sources of white light available today. Incandescent and mercury vapor lamps in exterior locations should be replaced with metal halide, high-pressure sodium and/or low-pressure sodium lamps. Most of the times, the metal halides are compounds containing bromine and iodine as the halide component. John, I see HIDs used as work lights in TV studios with 20-30' ceilings. 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. In applications where constant illumination is important for safety and security, a backup system is often required. The big bulbs are just blinding. The mercury arc produces a bluish light that renders colors poorly. All rights reserved. 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. All these special interest groups and the government shouldn't have any say so about what lights we can and … The advantages and disadvantages of these lamps are listed in the table below. Benefits of Metal Halides Metal Halides are much more efficient and higher quality than incandescent bulbs. Mercury vapor lighting is the oldest HID technology. In the latter case, you want to make sure your bulb offers comparable lumens first and foremost. These lamps feature special chemical compounds known as “halides” that produce light in most regions of the spectrum. Mercury and sodium vapors in the ceramic arc tube produce a yellow/orange light with extremely high LPW performance and exceptionally long service life (up to 40,000 hours). A metal halide lamp that may be started on a high pressure mercury vapor lamp ballast is disclosed in U.S. Pat. Some halides have a lower vaporization point and will begin to drop out of the discharge if the lamp gets colder. Usually, the borosilicate glass outer bulb of the lamp performs this function but special care must be taken if the lamp is installed in a situation where this outer envelope can become damaged. High-pressure sodium sources were developed primarily for their energy efficiency. LED corn cob lamps come in 2 basic types - Direct Wire (ballast bypass) or Ballast Driven (plug-and-play). The metal halide lamp is definitely an AC energy source, which generates an arc discharge light emitting light within a mixed vapor of mercury and uncommon metal. Metal halide lamps are among the most energy efficient sources of white light available today. Mon - Fri 8:30am - 5:30pm EST 1-800-545-7778. This is a wonderful article explaining the fundamentals of HID and one thing I would like to add is the color of the lamps. They offer high efficacy, excellent color rendition, long service life and good lumen maintenance. You can usually walk through a big box store, sports complex, church or warehouse and quickly spot which HID’s are about to go out. Metal halide lamps are a form of the light source that creates light via passing an electric arc through a gaseous mixture of mercury vapor and vapor of some metal halides. 3,900,761 dated Aug. 19, 1975 issued to Freese et al. So, while metal halides may have a higher foot candle, LEDs produce more, usable light. 2. There are three main types of HID lamps: mercury vapor, metal halide and sodium. Metal halide lamps are a form of the light source that creates light via passing an electric arc through a gaseous mixture of mercury vapor and vapor of some metal halides. Figure 01: A UV Blocked Metal Halide Lamp. Borosilicate glass, also known as Pyrex insulates the lamp, insulating the lamp is extremely important to keep the color constant. The efficiency of metal halide lamps is from 1.5 to 2 times that of mercury vapor lamps. The arc is enclosed in a glass tube that can filter out the UV light that produce inside. I like mercury vapor better than HPS or MH, metal halide contains more mercury in it than mercury vapor and always tends to explode, also high pressure sodium creates an unpleasant orange haze at night (even full cutoff ones) and isn't very visable at night. Other HID types that offer higher LPW and better color properties have largely superceded the use of this lamp. Main Difference – Metal Halide vs High Pressure Sodium. If it is possible the wattage of the bulb would be restricted by the rating of the ballast. What is Multi Vapor These lamps are similar to mercury vapor lamps in several ways, but these lamps contain more gaseous components along with mercury vapor. If anyone is looking for replacement HID’s please support our store http://www.planetbulbstore.com/hid.html, Your email address will not be published. A metal-halide lamp is an electrical lamp that produces light by an electric arc through a gaseous mixture of vaporized mercury and metal halides (compounds of metals with bromine or iodine).It is a type of high-intensity discharge (HID) gas discharge lamp. Mercury vapor lamps have long life, but are not as energy efficient as metal halide, producing only 35-58 lumens per watt. MH vs HPS. In addition, HID lamps require a warm-up period to achieve full light output. Both Metal Halide and High Pressure Sodium bulbs are part of the HID family of bulbs. Here we have the 3 kinds of High Intensity Discharge bulbs firing up at once. 2 Posts . Compare the Difference Between Similar Terms. Sometimes metal halide ballast kits will list like M90 and H38 on it's label, if it was designed run both 100W metal halide and 100W mercury vapor lamps, but not always. These lamps are very useful in both indoor and outdoor applications. 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