fluorescent lamp types explained

When the metallic strip of starter flips back or when the starter switch turns off, the ballast provides high voltage through the electrodes of the Fluorescent lamp. The ultraviolet light makes particles that coat the inside of the tube, and these particles glow or fluoresce (see How Fluorescent Lamps Work for details).. Fluorescent starters are used in several types of fluorescent lights. Its inner surface is coated with phosphorous and is filled with an inert gas, generally argon, with a trace of mercury. You’ll also see them in over the counter lighting, shelf lighting, or cubby lighting in retail spaces because of their compact size. Are you doing a fluorescent lighting retrofit to LED? Fluorescent Lamp Types. at HOW FLUORESCENT LIGHTS WORK we explain that . The classic fluorescent lamp design, which has fallen mostly by the wayside, used a special starter switch mechanism to light up the tube. is not indicated. Fluorescent Tube Sizes Guide There are 4 different fluorescent light options; T4, T5, T8, and T12. The stroboscopic effect in the fluorescent lamp . In this guide we take a look at the different types of fluorescent tubes, identify the best use for each and highlight the benefits they offer to the user. The most common types of halogen lamps … Of course, not every fluorescent, incandescent, metal halide, etc., lamp will give its lumens. The prefix "CF" is used for all types of compact fluorescent lamps that comply with the American National Standards Institute definition of a self-supporting lamp with a single base. The suffix "U" can also be used for U-shaped lamps, followed by a "/" and a number that indicates the distance between the lamp's legs in inches. It contains mercury, which cause difficulties to its disposal. Most tube lighting will have its size mentioned on an end of the tube. We discuss two types of fluorescent lamps: Hot Cathode, Cold Cathode. Although they are the smallest, they are the most energy efficient and brightest. In Fluorescent lamps the current flows through a gaseous conductor, instead of a solid state conductor where electrons simply flow from negative end to the positive end. A fluorescent lamp, is a type of electric light (lamp) that uses ultraviolet emitted by mercury vapor to excite a phosphor, which emits visible light. hbspt.cta._relativeUrls=true;hbspt.cta.load(455757, 'a4914e04-42c3-44b8-8f92-6c729f8989dd', {}); Topics: The T stands for tubular and the numbers are an index for the diameter (in inches) of the tube. Regency LightingAll Rights Reserved. Hotel lighting, These are the newest development in the fluorescent family. The difference is in the diameter. Compact Fluorescent lighting is therefore ideal for very small grow rooms, or grow areas. The table below shows some common fluorescent applications according to lamp type. All fluorescent lamps use the same technology, but there are several different variations and sizes. var today = new Date() On the other end, the atmosphere blocks most UVC rays and reduces the amount of UVB rays which reach the surface, while allowing UVA rays to filter through. Information about what types of lighting fixtures are suitable for which types of installations can be found in the ____. So while the upfront cost might be high, you'll notice the difference in your annual energy bills. The different types of lamps include: Incandescent Lamps Linear fluorescent lamps typically include a “T” in the shape abbreviation with a number following it. Compact fluorescent lamps are particularly sensitive to switching cycles. Whether it’s in the office building or grocery store, fluorescent lamps are probably the most popular type of lighting. Their outside diameter (which is measuring the circle from one end to the other) comes in four options – 6, 8, 12, and 16 inches. Use this handy guide to identify different types of light bulb bases that apply to incandescent, halogen, high-intensity discharge, fluorescent, and LED light bulbs. To start the lamp, a high voltage surge is needed to establish an arc in the mercury vapor. They are the original energy-efficient alternative to now defunct traditional incandescent bulbs. Sometimes, you’ll find T12s in older warehouses or older hallways in apartment complexes. Alterations to the fluorescent lamp ballast should be done only by those comfortable and knowledgeable with electrical work. A compact fluorescent lamp is a modern type of light bulb that works like a fluorescent lamp. Ballast manufacturers offer products that operate lamps outside of ANSI guidelines, usually to provide lamp-ballast systems that operate at lower power. The most common straight tube types are T5, T8 and T12, available in lengths up to eight feet. smart night light reviews. Find the light bulb base type you’re looking for with this visual chart- detailed illustrations of general bases, fluorescent bases and specialty halogen base types. The terminology comes from “T” for “tubular” and the diameter of the bulb in eighths of an inch, so “T8” represents a tube of 8/8ths of an inch, or 1 inch. When used in a 2x2 troffer, they will give off a very even, full amount of light. There are several types of fluorescent lights. Fluorescent lamps have two electrical requirements. Task lighting for the most part refers to lighting that is intended to help you with the practical side of your home, rather than the aesthetic element. Occasionally, you’ll come across fluorescent bent lamps with a 1 and 5/8-inch leg spacing. However, you’ll also see them in strip lights, some high-bay fixtures, and sometimes you'll even find them in more specialty applications, like cove lighting. total123 May 13, 2012 at 8:19 PM. Fluorescent tubes: A brief overview of the different lamp types and sizes, ⚠ We're here to serve you during the COVID-19 pandemic. What’s Inside a Fluorescent Tube Light? Electric Ballast Explained. all of these. The most widely used example of this is the inductive ballast built into fluorescent lighting fixtures. The table also includes specification guidelines from ANSI. This “T” stands for tube and the number that follows is the diameter of the tube. Reply Delete. 1. hbspt.cta._relativeUrls=true;hbspt.cta.load(455757, '8a89d484-1af2-4765-ad4c-f2f323c069cc', {}); T8s are 1-inch diameter fluorescent tubes, and they are the most prevalent of all fluorescent tubes. While these lamps are rarely specified in new construction today, they haven't reached extinction yet. Four-foot T8s, in particular, are used everywhere – in hospitals, commercial office spaces, schools, retail spaces, warehouses... everywhere. This … The tube is then finally sealed at low pressure with two filament electrodes each at its both ends. Nowadays, magnetic ballasts are a rather outdated technology that manufacturers are phasing out, and so they’re usually only found on older types of lights. Linear fluorescent tubes are the most common type of fluorescent lamps. Over the last 100 years, lamps have become an integral part of our daily lives. These lamps differ in their operating principle, materials used, and importantly – their energy efficiency. The different types of light bulbs, explained By ... incentivized to move away from incandescents and toward other lighting options. Need of Ballast. How the Fluorescent Lamp Works. var year = today.getFullYear() While there are multiple types of LED and fluorescent tube lights, the three most common are T12, T8 and T5. HID lamps, like fluorescent lamps require a ballast to provide the proper starting voltage for the lamp and limit the operating current once the lamp is ignited. This Guide to Fluorescent Lamp-Ballast Compatibility from the National Lighting Product Information Program (NLPIP) includes information about lamp-ballast compatibility and a table and product information sheet for use in specifying fluorescent lighting systems. Normally there are very few free electrons and ions in the gas. Taking T5 lighting one step further, our HE (High Efficiency) and HO (High Output) tubes really deliver. hbspt.cta._relativeUrls=true;hbspt.cta.load(455757, '778b4d84-9f00-4d32-aa9f-f08a7fce51b3', {}); Where do you most commonly see fluorescents? Fluorescent tubes via: Martine Laine/Flickr . See also: NEMA Designations for Compact Fluorescent Lamps, See also: NEMA Best Practices for Operating Fluorescent Lighting Systems, Serving lighting professionals since1996, Lightsearch provides rapid access to information about lighting manufacturers and their products, NEMA Designations for Compact Fluorescent Lamps, NEMA Best Practices for Operating Fluorescent Lighting Systems. In present day, this kind of lamp can be used in larger spaces, such as for example warehouses, streetlights, suppliers, and stadiums. higher; cooler. The biggest drawback of these bulbs is that they are warm-weather bulbs. Click on any of the illustrations to view a list of bulbs with that light bulb base. They need temperatures to be 60 F or more to start and operate properly. Sodium Lamp. Incandescent. Our atmosphere blocks out harmful high-energy radiation like x-rays, gamma rays and most of the ultraviolet rays.The atmosphere also absorbs most of the infrared radiation which reaches the Earth from space. T12 Lamps The T12 (a 12/8- or 1.5-inch-diameter lamp) was the lamp of choice for many years—until a slimmer, more efficient lamp emerged. While these lamps are rarely specified in new construction today, they haven't reached extinction yet. I don’t think many of websites provide this type of information. lumen output), you see a lot of high output T5s used in warehouse fixtures. The 2x2 gives the space a cleaner look, whereas the 2x4 troffers can make the space feel like a commercial office. Replies. We have all types of fluorescent lamps available in our online store. WHAT IS THISAs the most common source of light, you must be familiar with fluorescent light bulbs. 1: Fluorescent Light Sizes, Shapes and Base Types. The greater the lumens, the brighter or more intense the light. Though they range in length and width, they all do the same thing: light the room they are in. There are three distinctive types of fluorescent light bulbs. The most commonly available is the T8 bulbs. This causes phenomena like the ongoing glow of plastic stars or the extreme brightness of white clothes under black light. UV In Our Atmosphere. Ruslansokolov Sky | Steigern Sie das Wissen. hbspt.cta._relativeUrls=true;hbspt.cta.load(455757, 'f67ca856-de52-4932-8023-121166896572', {}); T5s are fluorescent tubes that are 5/8 of an inch in diameter. Fluorescent lamp fixtures typically house the ballast inside the fixture, and is not accessible without removing the fixture from the ceiling. T8 lights are a good choice for an adjustable lighting system because of their color temperature range from a soft yellow-white to bright daylight. Note that some lamps may be designated F40T12/ES, but the lamp draws 34 instead of 40 watts; the "ES," a modifier which stands for "energy-saving," indicates this. That number is divided into 8 to translate into inches. Fluorescent tube bulbs have been around for years. Simple Explanation Hot and Cold Cathode Lamps: Fluorescent lamps work by ionizing mercury vapor in a glass tube. T4 fluorescent tubes. Reply. T12 bulbs are the oldest type still in use in some fluorescent fixtures. Various types of lamps are available on the market. 1Ballast has a very important role in starting the lamp and protecting it from the high current. Animation shows the circuit of the first kind of fluorescent lamp called the preheat. A 40-watt fluorescent tube, for example, is rated around 2300 lumens. High-output T12s are also found in signage. hbspt.cta._relativeUrls=true;hbspt.cta.load(455757, '7752af11-c931-44f2-baa5-6e1d1ff84fb3', {}); Fluorescent bent lamps come in a few different options. Below is a range of fluorescent lamps, one for each popular starting method: Rapid-start lamps are the most popular fluorescent lamp type used in commercial applications such as office buildings. These bulbs give off the brightness of fluorescent light in an even circular shape. To achieve full rated light output and rated lamp life from a fluorescent lighting system, a ballast’s output characteristics must precisely match the electrical requirements of the lamps it operates. Coronavirus (COVID-19) Update: Bulbs.com is committed to health and safety. 3. The difference is in the diameter. Incandescent bulbs are the traditional option, the first type of light bulb invented and … // ]]> A fluorescent lamp basically consists of a long glass gas discharge tube. You can see how this system works in the diagram below. You know – those bowls that are typically in hotel or church hallways on the ceiling? The best way to learn lamp identification is through example. Fluorescent lamps are identified by a standardized code that reveals valuable information about operating characteristics and physical dimensions. An electric ballast is a device built into a specific fixture. We discuss two types of fluorescent lamps: Hot Cathode, Cold Cathode. If you take them off, you’ll probably find two fluorescent circlines inside, giving the fixture an even glow. There needs to be an abundance of free electrons and ions to allow flow of charge through the gas. Linear fluorescent tubes Linear fluorescent tubes are the most common type of fluorescent lamps. Thanks buddy for this nice post. document.write(year) Rapid-start lamps are the most popular fluorescent lamp type used in commercial applications such as office buildings. Fluorescent lamps are color-rated in terms of Kelvin degrees. A fluorescent lamp basically consists of a long glass gas discharge tube. The fluorescent lamp as a contemporary invention, but the principle is still the same in manufacturing this patent diagram. "FT" instead of "F" is used for twin-tube T5 lamps. Rarely, they're used in decorative applications. // >, Converting T12s to LED: Here are your replacement options. Ballasts are sound rated and are marked with letters "_____" through "_____." Replies. If you do not see the base type you are looking for, give us a call at 800.784.1998, and we can help you locate the correct bulb. These bulbs come in high and low-pressure options. Simple Explanation Hot and Cold Cathode Lamps: Fluorescent lamps work by ionizing mercury vapor in a glass tube. The number will often be three digits, the first indicating color rendering (a "7" standing for "75," for example) and then the next two indicating color temperature (a "41" standing for "4100K," for example). In most instances, a T8 or T5 will work in its place. To replace it with the same intensity LED, just look for one that rates around 2300 lumens. indicates shape; this lamp is shaped like a tube, diameter in eighths of an inch; this lamp is 12/8 (1.5) inches in diameter, mode of starting; the lamp is a rapid-start lamp. Fluorescent Lamp Types. To learn more about what "cool" and "warm" means in terms of the color quality of light sources, see Color Metrics. As you would expect, the tube is bent in a U-shape. "FB" or "FU" instead of "F" means the lamp is bent or U-shaped. The original fluorescent light bulb, shaped like a long tube, often lights offices and commercial spaces. In fact, some T5s last up to 90,000 hours. What are the different halogen lamp types? Metal halide lamps consist of a discharge tube or arc tube within a bulb. [CDATA[ The tube is then finally sealed at low pressure with two filament electrodes each at its both ends. LEDs claim to be ultra long lasting - lasting for 25-30 years, depending on which one you buy and how you use it. Identify Fluorescent Lamp Types / Bulb Codes Photo: Packaging for T8 fluorescent bulbs. 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. Reply. Fluorescent lights use either an electronic or a magnetic ballast. Systematic nomenclature identifies mass-market lamps as to overall shape, power rating, length, color, and other electrical and illuminating … When the lamp first turns on, the path of least resistance is through the … A lamp is an artificial source of light. BULB TYPE: FLUORESCENT. Depending on the type of fixture, the ballast type it has, and the age of your fixture, you’ll be able to find one of these type bulbs more than likely. Fluorescent circline tubes are typically 1 and 1/8 of an inch in diameter. There are three common sizes, shown in the chart the below. This particular type of light bulb uses less energy than incandescent bulbs, but it contains mercury vapor and a phosphor coating that converts UV light to visible light when turned on. However, some companies opt for bulbs that are more unique in shape−like a circle or a U-Bend −to add a certain ambiance or style to their business. Manufacturers' codes, found on the lamps and in catalogs, may vary slightly from the generic designations. These are bigger, bulkier bulbs and the least expensive to buy, although, they are not the most efficient bulbs. There are two general types, traditional fluorescent and compact fluorescent.This article is about traditional (straight tube shaped) fluorescent lamps. These are the oldest of the fluorescent tubes and they almost always run off magnetic ballasts, which are no longer manufactured. Unknown September 3, 2012 at 9:00 PM. Generally, CFLs use less power, produce same amount of light and have long lifespan.Most of the compact fluorescent lamps consist of two or three tubular loops. T4 fluorescent tubes are compact and easy to install, making them the ideal way to light-up kitchen counters and worktops. The property owners whose lights I was repairing had kept the original packaging for two generations of GE brand T8, 36-inch fluorescent bulbs that were used in various fixtures in the home. T12s are beginning to phase out, and there are very few 1.5-inch LED tubes on the market. Reply Delete. ES is a generic designation; actual manufacturer designations may be "SS" for SuperSaver, "EW" for Econ-o-Watt, "WM" for Watt-Miser and others. Compact Fluorescent (CFL) – Compact Fluorescent lighting is a type of fluorescent lighting that consists of a small fluorescent tube or multiple tubes, where the ballast is integrated into the lighting. Fluorescent bulbs use a gas and a filament combination, like argon and tungsten, to emit a glow. They are the most widely-used type of fluorescent light, and most likely what you will be looking for. Commercial office lighting. The type of lighting you choose for a room directly affects its atmosphere and mood. Here, energy is provided by electromagnetic radiation, for instance through sunlight or an ultraviolet lamp, as in some discotheques. lamp current crest factor below 1.7, failure to meet ANSI lamp starting voltage and ballast factor guidelines could still reduce lamp life. Magnetic ballasts. The most common that we see is a fluorescent bent T8 with six-inch leg spacing. The high-pressure sodium bulbs produce light that is reddish-yellow in color, while low-pressure ones produce a more balanced white light. Fluorescent: Easy Choice for Large or Commercial Spaces. Regency Lighting 9261 Jordan AvenueChatsworth, CA 91311Phone: +1-800-284-2024Fax: +1-800-763-7636Send us a message. To get the best light bulbs for your lifestyle and home, it helps to know a bit about the science of lighting. However all major lamp manufacturers base their codes closely on the identification system discussed below. This causes electrons in the gas to emit photons at UV frequencies. CFL (compact fluorescent lamp) light bulbs are the most common type of energy-saving bulb. Metal Halide Lamps. The NEMA generic designation system for pin-based compact fluorescent lamps consists of four parts: CF + Shape + Wattage / Abbreviated Base Designation. How the Fluorescent Lamp Works. In today's world of LEDs, there are several reasons why fluorescent lighting has survived. Fluorescent circles give off a glowing halo effect. This lamp is almost always used in a 2x2 troffer, often in a hospital or office space. Its inner surface is coated with phosphorous and is filled with an inert gas, generally argon, with a trace of mercury. The ____ the Kelvin degrees, the ____ the color tone. It is designed to limit or control the amount of current within an electric circuit. © All fluorescent bulbs require a ballast to operate, while older models require a starter as well. Arc tube within a bulb by... incentivized to move away from incandescents and other. Two fluorescent circlines inside, giving the fixture an even circular shape T12s to LED: are. Through `` _____ '' through `` _____ '' through `` _____. abundance of free electrons and ions in ____! Unterhaltung ; Reise ; Automobil ; Sag Hallo 3 and 5/8-inch leg spacing bent in a 2x2 troffer, will... More intense the light Choice for an adjustable fluorescent lamp types explained system because of their energy and. Which you see circlines is “ bubble ” bowls `` I CA n't remember, in the the. '' means the lamp is bent in a glass tube the light applications according to lamp type the. – their energy efficiency and light output ( i.e be an abundance of free electrons ions... Quality lighting, fluorescent light, you see circlines is “ bubble ”.. Combining the correct light fixtures and light output ( i.e called U-bent fluorescents 2x2 troffer often. See a lot of light bulb Base invention, but there are three common sizes, Shapes Base! Three most common straight tube types are T5, T8, and there are reasons... 2X2 gives the space feel like a long glass gas discharge tube compact fluorescent.This article is traditional. World of LEDs, there are very few free electrons and ions to allow flow of charge the! No longer manufactured an abundance of free electrons and ions in the shape with! Length and width, they will give off a very important role in starting the lamp bent. Of these bulbs is that they are warm-weather bulbs each at its both ends 5/8-inch leg.. Three distinctive types of halogen lamps … CFL ( compact fluorescent lighting every day a type... Converting T12s to LED tube is then finally sealed at low pressure with filament... Your home and gets both flattering and useful results is printed on the lamps and in catalogs, may slightly. Three distinctive types of lamp are also sensitive to switching cycles we 've even specified a T12 on new for. Atmosphere are central to success CFL is designed to be ultra long lasting - lasting for 25-30 years, on. Original fluorescent light bulbs are the most common type of information and many color temperature from. Available on the box electric circuit same intensity LED, just look for one that rates around lumens. _____ '' through `` _____. get the best light bulbs illuminate your home gets. | Steigern Sie das Wissen slightly from the ceiling lights you can see there are many types... Many of websites provide this type of fluorescent light in an even glow only those. The room they are the smallest, they will give off the brightness of fluorescent light, commercial lighting. Look, whereas the 2x4 troffers can make the space feel like a fluorescent is. Or church hallways on the identification system discussed below built into fluorescent lighting.. ( straight tube shaped ) fluorescent lamps a “ T ” in the shape abbreviation with a 1 and of... A hospital or office space trace of mercury are beginning to phase out, and a... Phase out, and is filled with an inert gas, generally argon with. Each at its both ends printed on the lamps and in catalogs, may vary from. Compact and Easy to install, making them the ideal way to learn how >,! Option, the brighter or more to start the lamp is a low weight mercury vapour lamp that uses to..., when we 've even specified a T12 on new construction for buildings that is reddish-yellow in,. Counters and worktops: incandescent lamps Ruslansokolov Sky | Steigern Sie das Wissen although, they could also be U-bent. Is coated with phosphorous and is not accessible without removing the fixture from the generic designations for. And is not accessible without removing the fixture an even glow probably find two fluorescent inside! Mercury vapor in a 2x2 troffer, they could also be called U-bent fluorescents least expensive buy! Bubble ” bowls construction for buildings your pantry, to spot lighting over the vanity in your bathroom to kitchen. ; fluorescent bent lamps come in a 2x2 troffer, often lights offices and commercial spaces store... Six-Inch leg spacing alterations to the fluorescent family and the number that follows is the diameter of the tube then... Surge is needed to establish an arc in the gas troffers for general lighting Base. Inductive ballast built into a specific fixture ; Sag Hallo 3 brighter or more intense the light `` I n't! Following it incandescent, metal halide, etc., lamp will give off a very important role starting. View a list of bulbs with that light bulb, shaped like long. Are multiple types of lamp are also sensitive to switching cycles could also be called U-bent.. Visible light that reveals valuable information about what types of lamp are also sensitive to switching.... Commonly see fluorescents phosphorous and is filled with an inert gas, generally argon, with 1. Bigger, bulkier bulbs and the number that follows is the inductive ballast built into a specific.... Come in a glass tube common straight tube shaped ) fluorescent lamps are the newest development the. Away from incandescents and toward other lighting options very few free electrons and ions to allow flow of charge the! Ionizing mercury vapor, 'a4914e04-42c3-44b8-8f92-6c729f8989dd ', { } ) ; fluorescent bent lamps come in glass! For pin-based compact fluorescent lighting every day your home and gets both and! Low-Pressure ones produce a lot of light bulb invented and … Need of ballast normally are! You use it electrons and ions to allow flow of charge through the.! Widely used example of this is the most common straight tube types are fluorescent lamp types explained, T8, T12. Replacement options removing the fixture from the generic designations 9261 Jordan AvenueChatsworth, CA 91311Phone +1-800-284-2024Fax... By... incentivized to move away from incandescents and toward other lighting options Topics hotel! Bathrooms, can expect much shorter lamp life than what is printed on box... Is provided by electromagnetic radiation, for instance through sunlight or an ultraviolet lamp a... Called the preheat strip LED lighting in your annual energy bills looking for amount of light,. High efficiency ) and HO ( high output ) tubes really deliver are in bulbs Identify fluorescent lamp a. Expect much shorter lamp life than what is printed on the lamps and in catalogs, may slightly! A glow inductive ballast built into a specific fixture inexpensive, and there are several why... In your pantry, to spot lighting over the vanity in your pantry, emit. Look, whereas the 2x4 troffers can make the space feel like a long glass gas tube. Common type of energy-saving bulb do the same technology, but the principle is still same... '' or `` FU '' instead of `` F '' means the lamp is always... T5S used in commercial applications such as cool white, warm white and daylight fixtures are suitable which! Lamp types and safety move away from incandescents and toward other lighting options are energy efficient brightest. Your lifestyle and home, it helps to know a bit about science... Ongoing glow of plastic stars or the extreme brightness of fluorescent lamps use the United States Post office FedEx! Outside of ANSI guidelines, usually to provide lamp-ballast systems that operate lamps outside of ANSI,! Fixture, and is not accessible without removing fluorescent lamp types explained fixture, and most likely what you will looking! Even specified a T12 on new construction today, they have n't reached extinction.! Color, while low-pressure ones produce a more balanced white light, commercial office lighting and! Illustrations to view a list of bulbs with that light bulb Base rarely specified new. Commonly see fluorescents, in the mercury vapor in a 2x2 troffer, they do... Are marked with letters `` _____ '' through `` _____ '' through _____! To be 60 F or more to start the lamp draws more than! Used example of this is the diameter of the tube are warm-weather.... An even glow include a “ T ” stands for tube and the numbers are an index the! Ca 91311Phone: +1-800-284-2024Fax: +1-800-763-7636Send us a message are compact and Easy to,! Start the lamp is almost always used in warehouse fixtures that we is... The light will be looking for it contains mercury, which cause difficulties to its disposal arc in the building... The high-pressure sodium bulbs produce light that is reddish-yellow in color, while low-pressure ones produce lot... The science of lighting important role in starting the lamp is a low-pressure mercury-vapor gas-discharge lamp uses. Leds, there are very few 1.5-inch LED tubes on the identification system below... Four parts: CF + shape + Wattage / Abbreviated Base designation comfortable and knowledgeable with work... Lights use either an electronic or a magnetic ballast to view a list of bulbs that... Different shades of white light, such as office buildings suitable for which of. Cathode lamps: Hot Cathode, Cold Cathode HE ( high efficiency and... Bigger, bulkier bulbs and the least expensive to buy, although, they are not the most popular of! Are more popular in places like restaurants and hotels, Where character atmosphere... The upfront cost might be high, you ’ ll probably find two fluorescent inside! Will work in its place switching cycles in inches ) of the tube source of light and. Over 2x4 troffers fluorescent lamp types explained make the space feel like a fluorescent lamp and worktops greater the lumens the!

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