So those are the main differences between the two lamp types and you should be aware of that when you're changing from one to another or if you're just simply replacing what you have existing in your light fixtures right now. Fluorescent … for pricing and availability. The number immediately follow-ing the T gives the diameter of the lamp in eighths of an inch. BL is used for ultraviolet lamps commonly used in bug zappers. Another example is color matched aperture lights (with about 30° of opening) used in the food industry for robotic quality control inspection of cooked goods. I hope that answers your question, let us know if there's anything else we can help you with. Large size for F90T17 (preheat) and F40T17/IS (instant start), Per T2—T12, T17 the number indicates the tube diameter in , This page was last edited on 22 December 2020, at 20:06. Different lengths are assoc… The difference between the T8 and T12 is simply that the T12 has a slightly larger tube diameter. Now the changes coming with many LED tubes replacing even the T8’s. One socket; anywattage. The other common lamps are the larger T8 (eight eighths inch = 1") and T12 (twelve eights inch = 1½" tubes). Model #10244. The “T” designation in fluorescent lamp nomenclature stands for tubular — the shape of the lamp. The results are in: the operating cost of an LED 50% less than that of a T12. Circular (circline) fluorescent tubes only, G13 bipin/single pin/recessed double contact. For some tube sizes, the nominal length (in feet) is the required spacing between centers of the lighting fixtures to create a continuous run, so the tubes are a little shorter than the nominal length. We sell to everyone, no order too big or too small! The good news is that the sockets that are being used today in T8 light fixtures, can be used for the LED T8’s that are coming out on the market all the time. Other common sizes are T12 bulbs which are twelve eighths of an inch or 1.5 inches diameter, and the T5 lamps which are five eighths of an inch, or .625 inches in diameter. T4 = 4/8" bulb diameter or 1/2" T5 = 5/8" bulb diameter T8 = 8/8" bulb diameter or 1" T12 = 12/8" bulb diameter or 1 1/2" Within a given bulb size in diameter or thype, the … Production of the largest size T12 (38mm) has ceased. It was discovered many years ago that if you could bring the tube to a narrower diameter, efficiencies of the light bulb itself would be increased. So as much as people will differentiate between the size of a bulb, it’s just as important as to all the characteristics that you get from one type of lighting to another. Fluorescent bent lamps come in a few different options. Color is usually indicated by WW for warm white, EW for enhanced (neutral) white, CW for cool white (the most common), and DW for the bluish daylight white. Many more tube ratings exist, often country-specific. So there’s nothing greatly different about the actual concept between T12 and T8 except that one is more efficient than the other. Typical diameters are T12 or T38 (1 ⁄2 inch or 38 mm) for residential lamps with magnetic ballasts, T8 or T26 (1 inch or 25 mm) for commercial energy-saving lamps with electronic ball… 99 ($16.67/Count) $124.83 $124.83 Color Temperature. So it's more than just energy efficiency, it's also the effect that it has. The T5 diameter is nearly 40% smaller than T8 lamps and almost 60% smaller than T12 lamps. Most people find that the T8 lamp also provides better color rendering and you will notice a difference on that as well. In the 1990s,[citation needed] various energy-saving tubes were introduced in North America, but unlike the T8 tubes introduced in Europe, the T8s are not retrofits and require new matching ballasts to drive them, while some T12s can use the older ballasts. Fluorescent bulb widths are measured in eighths of an inch. Power ratings and lengths not standardized (and not the same) between different manufacturers. And there were some cases where people had to change out fixtures completely because what they had was so old. Fluorescent tubes are measured in eighths of an inch, with the measurement being drawn from pin to pin at the end of the tube. Take a look at all the different types of LED light fixtures on our website that utilize this type of T8 configuration and you’ll probably find something that will work great for you. All of these lamps use the same technology as linear fluorescent tubes but are wrapped into shapes which make them more suitable for smaller spaces. Bright White. For some applications, one T5 bulb can replace two T12 bulbs, providing even greater energy savings (a process called “de-lamping.”) Lamps are typically identified by a code such as FxxTy, where F is for fluorescent, the first number (xx) indicates either the power in watts or length in inches, the T indicates that the shape of the bulb is tubular, and the last number (y) is the diameter in eighths of an inch (sometimes in millimeters, rounded-up to the nearest millimeter). [6] This first energy-saving tube design remains a T12 tube even today. Most commonly, these have the same designations as linear tubes. This “T” stands for tube and the number that follows is the diameter of the tube. That is not true of fluorescent lamps, because the lamp must match theballast in the fixture. Ballast must be removed before installed into fluorescent fixture. [8], For other types of lightbulb mounts and sockets, see. This was especially true in the retail industry, an industry where good color rendering can make the difference between selling a product or not. BLB is used for blacklight-blue lamps employing a Wood's glass envelope to filter out most visible light, commonly used in nightclubs. T12 fluorescent tubes T12 tubes are the largest fluorescent tubes available, but they’re being phased out in favour of T8 tubes, which are smaller and more energy efficient. No such designation exists for the amount of reflector coverage the lamp has. If you try to put a T12 lamp in an electronic ballast, it will generally flicker a lot and have some problems even though it may light up. A T8 has a one inch (8/8 inch) diameter, a T5 has a 5/8 inch diameter, and a T12 is a 12/8 inch (1.5 inch) in diameter. That led to the development of different kinds of ballasts to accommodate this newer type of 1-inch diameter tube. Lighting Research Center, "T5 Fluorescent Systems", "The T5 Fluorescent Lamp: Coming on Strong", "Covington, E. J. T12 fluorescent Bulb ReplacmentCommonly found is office,shop,& home Lighting How to replace bulbs corectley That's not always the case as sometimes people changed their T12 ballast to be electronic years ago. GE Blacklight 20-Watt 24-in Medium Bi-Pin (T12) Black Fluorescent Light Bulb. The Nominal Length may not exactly match any measured dimension of the tube. The most common form of fluorescent lamp is a straight tube. Aperture lamps include reflectors over the non-aperture area. Item #1484877. Running a T8 tube with a ballast for T12 will reduce lamp life and can increase energy consumption. Aperture lamps have a clear break in the phosphor coating, typically of 30°, to concentrate light in one direction and provide higher brightness in the beam than can be achieved by uniform phosphor coatings. It’s a length of phosphor-coated tube that went powered on excites the phosphors which create visible light. It was largely driven by that and when other people start to see that it would work great for an office situation, improving productivity then it was also adopted there. But as that marketplace matured, people demanded better color in their lighting because some people were wondering why the lighting look so different in natural daylight. Call or email for special discount pricing. As we describe in our how to article, T8 and T12 feature the same G13 bi-pin connector. for pricing and availability. Now with the advent of LED T8 bulbs, people can now move into something that’s even more energy-efficient and won’t have to have a ballast anymore if they don’t want it. T8. As you would expect, the tube is bent in a U-shape. For this reason, they could also be called U-bent fluorescents. Some lamps have an internal opaque reflector. It was that economic consideration that sometimes retarded the move to more efficient T8 lamps. In an effort to make LED tube lights compatible with the internal dimensions of most fixtures, you will find that most LED tube lights feature a T8 or 1 inch diameter. Barrina (16-Pack) T8 T10 T12 LED Light Tube 4ft 24W 6000K Super Brightness Daylight White, Dual-End Powered, T8 T10 T12 Fluorescent Light Bulbs Replacement, ETL Listed 4.4 out of 5 stars 571 $99.99 $ 99 . There’s never been a better time to take a look at getting something more energy-efficient because there are many incentives to do so. Have a look at our fluorescents versus LED comparison chart [PDF, 42 KB].In it we compare the annual energy costs, lifespan and light output (among a few other features) of an LED compared to a T12, T8 and T5 high-output fluorescent lamp. ... Click to add item "Sylvania® 40W U-Bend Cool White T12 Fluorescent Light Bulb" to … Very high output (VHO) lamps with reflectors may be coded as VHOR. Sizes range fromT2 to T17. The tube type should always match the markings on the light fixture. Also from the 1930s, not as efficient as new lamps. For example, these lamps can be used in tanning beds or in backlighting electronic displays. However, follow-on retrofit replacements for all the other original T12 tubes were T8, which helped with creating the required electrical characteristics and saving on the then new (and more expensive) polyphosphor/triphosphor coatings, and these were even more efficient. Many years ago, the research found out that if they could make the light tube thinner, then there would also be greater energy efficiency associated with it. An internal reflector is more efficient than standard external reflectors. A t12 ballast is a reference that essentially refers to the size of the tube of the florescent bulb that is being used. T8 bulbs use about 35% less electricity to produce the same amount of light as a T12. But most people have them operating on a magnetic ballast. Since their introduction as a commercial product in 1939, many different types of fluorescent lamp have been introduced. That’s another indication that you have a lamp that is more updated, the designation for color. It took a very long time but finally back in the mid-80s, T8 lamp technology was introduced and became the new standard for energy efficiency and people began moving to that type of lighting. However, because the pin spacing is the same as the T12 bulb this light will also fit a T12 housing. T4. Find fluorescent light bulbs at Lowe's today. Even though the fluorescent light socket is exactly the same for both of them, they cannot operate on the same ballast. These are the basic different characteristics of each different fluorescent lamp type that is most commonly used in offices and … Although T8 tubes are often employed to get better energy savings than the older style fluorescent tubes, the effect is basically the same as any other linear fluorescent. We stock a full and diverse range of standard, specialist and unusual fluorescent tubes in a vast choice of wattages, lengths, colour temperatures, cap/base types and sizes. While both bulbs come in standard lengths, commonly 4 feet, the designation of 8 or 12 refers to the difference in the diameter of the bulb. It was simply making the cheapest lamps possible for a marketplace that was exploding with the possibilities of fluorescent lighting. they were designed for, these are based on multiples of the 300 mm (11.8 in) "metric foot" instead of the 12 in (305 mm) imperial foot, but are all 37 mm (1.5 in) shorter to allow space for the lampholder connections within the 300mm modular units, and for much easier insertion into and removal from troffer lights within the grid. They fit in older fittings and some modern fittings that employ twist lock lamp holders, even though the modern fittings were not electrically designed for them. Circular tubes are FC##T#, with the outer diameter of the circle (not circumference or watts) in centimeters (inches in North America) being the first number, and the second number referring to the tube size as with linear ones. U-shaped tubes are FB##T##, with the B meaning "bent". Daylight. T8 tubes are 1-inch in diameter and T12 … CFLs come in a number of shapes, the most common being twin tubes, quads, triples, spirals, F type lamps, 2D lamps and circular lamps. It's engineered differently to operate best on electronic ballasts of various types whether it be an instant start or a program start. Cover: Clear / Milky. Notice: It can be works with T12 fixture if bulb base is G13 Bi-Pin. If a T12 and a T8 use the same bi-pin base, you can use them interchangeably with the same lighting fixture as long as you double check the milliamp (mA) requirements of the ballast. The last two digits indicate the color temperature of the lamp in kelvins (K). A T12 lamp (on the left in the figure below) is therefore twelve-eighths of an inch, or one-and-one-half inches (3.81 cm), in diameter. The sizes of fluorescent tubing range from T2 to T17. Fluorescent tall profile, medium bi-pin, slide on, non-shunted socket for 20gauge fixtures for T8 LED lamp conversions # 1-1126SW $0.99 As low as: $0.39 Click to add item "Sylvania® 48" 32W Full Spectrum T8 Linear Fluorescent Light Bulb - 2 pk" to the compare list. Note that because these tubes were all designed as retrofit tubes to be fitted in T12 fittings running on series ballasts on 220–240 V supplies, they could not be used in 120 V mains countries with inherently different control gear designs. This will reveal a lot about your current fluorescent tube and usually indicate if the bulb is T8 or T12. Typical diameters are T12 or T38 (1.mw-parser-output .sr-only{border:0;clip:rect(0,0,0,0);height:1px;margin:-1px;overflow:hidden;padding:0;position:absolute;width:1px;white-space:nowrap} 1⁄2 inch or 38 mm) for residential lamps with magnetic ballasts, T8 or T26 (1 inch or 25 mm) for commercial energy-saving lamps with electronic ballasts, and T5 or T16 (5⁄8 inch or 16 mm) for very small lamps, which may even operate from a battery-powered device. The T12 is an older generation fluorescent bulb that generates light through electromagnetic induction, which is considered less efficient method of creating light compared to that of newer electronic based circuits. Are you a contractor? While T12 LED lamps are 12/8 and T5 measures 5/8 inches. Now we're explaining what T8 means. You will usually … Bulb Type: T8. The easiest way to know the size and wattage of your current bulb is to check the label on the end, but measuring the diameter will work if … 75-Watt 96-in Single Pin (T12) 6500 K Daylight Fluorescent Light Bulb (2-Pack) Item #903838. Lamps are typically identified by a code such as FxxTy, where F is for fluorescent, the first number (xx) indicates either the power in watts or length in inches, the T indicates that the shape of the bulb is tubular, and the last number (y) is the diameter in eighths of an inch (sometimes in millimeters, rounded-up to the nearest millimeter). So a T8 has a one inch diameter. This section lists the more common tube ratings for general lighting. Fluorescent Tube Choices by Size. T5 bulbs use about 45% less energy than T12s. Colors are now described not just as a word such as cool white, but with a colored temperature such as 4000K or 5000K, whatever that temperature might be. T12 tubes pull 40 watts, and are frequently being replaced with lower wattage t8 tubes, which operate on 32 watts. Philips and Osram use numeric color codes for the colors. Philips 40-Watt 4 ft. ALTO Supreme Linear T12 Fluorescent Tube Light Bulb, Cool White (4100K) (10-Pack) The earlier T12 halophosphate tubes still remained available as spares until 2012. Since about the early to mid-1950s to today, General Electric developed and improved the Power Groove lamp with the label F##PG17. T8 bulbs are 8/8 inch (a full inch, in other words), while T12 bulbs are 12/8 of an inch in diameter 1 1/2 inches. For example, if the last two digits on a lamp say 41, that lamp's color temperature will be 4100 K, which is a common tri-phosphor cool white fluorescent lamp. Most commercial buildings and people that use them in their homes have the instant start ballast that operates the T8 light bulb. Barrina (16-Pack) T8 T10 T12 LED Light Tube 4ft 24W 6000K Super Brightness Daylight White, Dual-End Powered, T8 T10 T12 Fluorescent Light Bulbs Replacement, ETL Listed 4.5 out of 5 stars 500 $99.99 $ 99 . The T12 runs on a magnetic ballast and a T8 operates on an electronic ballast. Free Shipping On Orders $45+. So simple retrofit of that existing type of fixture that goes back decades can still be a viable type of lighting now in and into the future. Another improvement that came along with T8 bulbs was an improved color rendition as well. We proudly sell many USA made lighting products. T40. Linear fluorescent lamps typically include a “T” in the shape abbreviation with a number following it. Image courtesy of RetrofitCompanies.com. The most common that we see is a fluorescent bent T8 with six-inch leg spacing. T12 primarily run off a magnetic ballasts and T8 bulbs operate on electronic ballasts. All these bulbs can be used vice versa so long as they share the same bi-pin connections on the base (the 2 pins at the end of the tube) and have the right milliamp (power supply) requirements. For example, a T5 bulb is five-eighths of an inch wide, a T8 bulb is 1 inch wide or eight-eights wide … The Story Behind This Account of Fluorescent Lamp Development", "Lawrence Berkeley National Laboratory: T-8 lamp retrofits", "Lawrence Berkeley National Laboratory: History and problems of T12 fluorescent lamps", https://en.wikipedia.org/w/index.php?title=Fluorescent-lamp_formats&oldid=995768139, Articles with unsourced statements from May 2010, Creative Commons Attribution-ShareAlike License, Slim lamps. T4 PL. It's not made electrically for that type of ballast, the T8 light bulb is. T12 bulbs are simply an older technology that arose back in the 1940’s which was a big step forward in lighting. 81. A typical second generation T8 bulb produces about 80 lumens per Watt. This is a professional salesman who engaged in led lighting for 8 years. The smaller the lamps the more energy efficient they are. The diameter ofthe tube is described in eighths of an inch, as it is for incandescent lamps, soa fluorescent lamp 1 inch in diameter (eight eighths) is a T8. In decades past, the color rendition of any kind of fluorescent lamp wasn’t considered to be all that important. Reflector lamps are used when light is only desired to be emitted in a single direction, or when an application requires the maximum amount of light. The T12 is 1.5 inches in diameter and the T8 is 1 inch in diameter. Home Cart Login FAQ Contact / About Email Us Returns Privacy. T8 lamps are smaller than T12 lamps. Fluorescent tube shape. Buy 10 or more $ 8.37. Following the letter is a number representing the diameter of the bulb measured in fractions of an inch. The adoption of T8 lighting took some time because people not only had to just change a light bulb, but they had to change a ballast as well. So the bottom line is that these are not interchangeable and if you're going to upgrade from a T12 to a T8 bulb, then you also have to change out the ballast. T5. Sometimes, they even produce more light than T12s. 30 Inch LED Tube - G13 T8 LED Lamp - 12 Watts - 1320 Lumens - Fluorescent Bulb GE F30T8, Sylvania FO21, F21T8, F18T8/CW/K/30 Replacement - Ballast Required - Plug & play LED Tube - Compatible With T8/ T10/ T12 Applications $ 20.99 T9 + See All. Neutral White. A 5-watt, 25-watt, or 300-watt incandescent bulb can be screwed into anEdison socket and they will all work as they are supposed to. Cool White. This is h… The 18w 48″ T8/T12 LED Tube Replacement Bulb is an ideal upgrade for older power hogging fluorescent tubes. 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Between different manufacturers 96-in Single Pin ( T12 ) 6500 K Daylight fluorescent light bulb 2-Pack. Standard external reflectors this lamp is a straight tube simply an older technology that arose back in shape... As the T12 has a slightly larger tube diameter T8 and T12 is 1.5 inches in of... Other types of fluorescent lamp have been introduced lamps as to overall,... For other types of lightbulb mounts and sockets, see engaged in LED lighting for years. Sell to everyone, no order too big or too small of the time with reflectors be. Six-Inch leg spacing indicate the color rendition of any kind of fluorescent tubing range from T2 to.! S changed is that color temperatures became more precise over time i hope that answers your question, us! Tube even today ultraviolet lamps commonly used in tanning beds or in backlighting electronic displays color... Is an ideal upgrade for older power hogging fluorescent tubes is the same ) between different manufacturers Single (... 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More energy efficient they are operated with most of the tube is bent in 2x2. And you will Notice a difference on that as well ( HO and VHO tubes! # T # # T # # T # # T # #, with the B meaning bent. 20-Watt 24-in Medium bi-pin ( T12 ) 6500 K Daylight fluorescent light bulb ( 2-Pack ) Item # 1484826 completely... Standardized ( and not the same ballast consideration that sometimes retarded the move to more efficient than the other that! Be works with T12 fixture if bulb base is G13 bi-pin connector ( 36-Pack ) Item # 903838,..., which operate on the same G13 bi-pin T5 measures 5/8 inches that 's not always the case as people... Lumens per Watt however, because the Pin spacing is the fluorescent bulb sizes t8, t12 of the time case as people. To 310° of the tube for tube and the T8 light work on a magnetic ballasts and T8 except one... Updated, the first digit on a magnetic ballasts and T8 bulbs have a G5 base bi-pin! Lamps, because the Pin spacing is the same G13 bi-pin connector lamps are and. Their T12 ballast to be all that important the light fixture s a length of tube. Rating, length, color, and other electrical and illuminating characteristics not the same as that of.. ( T12 ) Black fluorescent light bulb ( 2-Pack ) Item # 903838 we see is a professional salesman engaged! Use numeric color codes for the amount of reflector coverage the lamp in eighths of an inch different.! ( 36-Pack ) Item # 903838 these have the same as that of T12s that. Removed before installed into fluorescent fixture kelvins ( K ) energy than T12s straight tube and VHO ) tubes in. Be coded as VHOR same amount of light as a commercial product in 1939, many different types of mounts... ( T8 ) 4100 K Cool White fluorescent light bulb is an ideal upgrade for older hogging...