Now, a bulb’s power is usually measured in lumens. For example, an A19 is 2.375 inches in diameter (19/8=2.375) and 4.13 inches in height while an A21 is 2.625 inches in diameter (21/8=2.625) and 5 inches in height. Common sizes of the A bulb are A15, A19, and A21. From top left to bottom right: A19 LED filament bulbs in ceiling fan fixture, A21 LED bulbs in bedroom lamps, A19 gold-tint LED filament bulb in porch light fixture, A19 LED fireworks bulbs in string lights Standard/arbitrary (A) bulbs are the most widely used and thought of when it comes to household lighting. If there is already a bulb in the fixture, you can take it along and match it with the new bulb. This too has an E26 light bulb base like the A19. These bulbs have the same pear shape, but different sizes. General | 0 comments | 0 comments Here is a comparison of the base size of A19 and A21. Since they have the same base, you may be thinking that it won’t really make a difference choosing between the 2 since they can be used interchangeably anyway. This category only includes cookies that ensures basic functionalities and security features of the website. The “A” shape bulb was one the earliest bulb designs and it remains popular among homeowners until now. Obviously, an A21 bulb will be able to produce a higher number of lumens as compared to an A19 sized one because the A21 bulb has a bigger space for heat dissipation. Larger rooms need larger bulbs and smaller rooms need smaller bulbs. [Nest Thermostat Comparison in 2021], Nest E VS Ecobee3 Lite: Which One’s Better? Another common A-series light bulb type is the A15 bulb which is commonly used in the US for appliances and … The A15 bulb is 15 ⁄ 8 in (1 7 ⁄ 8 in; 48 mm) wide at its widest point. It stands as a standard for the bulb types. The higher the width the larger is the surface area. Would an A21 of 60 Watt equivalent last longer than an A19 of the same wattage? The A19 has a diameter of 2.375 inches and a height of 4.13 inches. Although the size difference is negligible in most applications, many buyers have been wanting to know why higher-wattage household LED bulbs are made in a larger size. White and color ambiance. Part #:104085. LED bulbs around 2700 Kelvin will be the closest match to what you're used to seeing with incandescents. Select Page. HowToTechh  is a participant in the Amazon.com Services LLC Associates Program, an affiliate advertising program designed to provide a means for website owners to earn advertising fees by advertising and linking to Amazon(.com, .co.uk, .ca, etc) and any other website that may be affiliated with Amazon.com Services LLC Associates Program. Lumen refers to the illuminating power a bulb emits when you turn it on. 9A19/927/277V - 800 Lumens - 92 CRI - 60W Incandescent Equivalent - 240° - 120-277V. Now, a bulb’s power is usually measured in lumens. However, further examination of the bulbs will show you that there is a slight difference in the size of the bulb head. Read the full disclosure. So, if you are keeping it switched on for 6 hours or more, it is not going to last 10 years. There is a chance that it would since the amount of heat generated is the same in both, but in the A21 it gets more space to disperse the heat. A17 light bulb has 2 ⅛ inches in diameter, A19 2 ⅜, A21 2 ⅝ inches. However, it is based on an assumption that you would light it only for say 3 hours a day. $ 32.99. [Google Nest VS Ecobee Thermostat In 2021], SmartThings Hub V2 VS V3: Which Samsung Smart Home Hub Should I Buy? Aside from the shape, they both use the same type of base for the socket. Therefore, it is a good idea to make sure that the fixture in your house will be able to accommodate the A21 bulbs. Let us know your experiences in our comments section below. A19 vs. A21 Product Dimensions The A19 measures around 2.375 inches in diameter and 4.13 inches height, whereas the A21 bulb comes in at larger dimensions, 2.6225 inches wide and 5 inches height. The A21 is larger in length and diameter compared to the A19. The larger the surface area the greater is the spread of light. We will help you for sure. These fixtures usually attach 40 to 60 Watt incandescent bulbs. a19 bulb vs a21. On the other hand, the A21 bulb has larger dimensions of 2.6225 inches in diameter and 5 inches in height. Distribution of light is an important measurement of the efficacy of a light bulb since LED bulbs illuminate evenly. We also use the website to answer various questions that you may have regarding LED lights. Everyone loves LEDs, but believe me when I say that not all LEDs are the same. 3. So the light bulb that most of us have used in our homes here in the States is an A19 bulb with an E26 base. So the internal electronics of A21 have to work under less heat compared to that in A19. It is slightly larger than the A19 bulb. So, if you are not going for dimmable lights, there is less chance of hearing any buzzing sound. A19 vs A21 Light Bulbs Comparison and Buyer’s Guide by Alex Norman | Last Updated: December 15, 2020 So many types of bulbs, so little time to choose a perfect one. A19 vs. A15 vs. A21 vs. A23. These A-shape bulbs have a standard medium base that you can screw into ordinary residential light sockets and table lamps. The A21 bulb measures 2.6 inches in diameter and between 4.1 and 5.4 inches in length. Q3. Hence, for those who are very particular with the numbers, you really have to take note of these small details. So, the light emitted by them travels in all directions, i.e in a 360 degrees angle. Buzzing sound is usually a problem with dimmable LED lights. This is especially true for LED lights of these sizes since LED lights are extremely powerful. As we have already established, the A21 bulb can have a higher lumen level since it has a bigger space for better heat dissipation. Between the A19 and the A21, the A21 light bulb is slightly more expensive but you are only looking at a few dollars extra for a multipack. In 2013 we were celebrating when … Dimensions are also important to make sure that the bulb fits the base and also the lamp head. Green Creative 98562 - 9W LED A19 - 2700K. If you’ve gone over to the light bulb section at the hardware store, you’ve probably seen bulbs with sizes like A19 or A21. Comparing the two types of bulbs means that you need to compare the a19 vs a21 bulb shape. This bulb produces a dimmable warm white light (2700K) that is ideal for all rooms. While comparing the two types of bulbs we need to take into account features like dimension, base size, degree of distribution of light, etc. Because A-shaped bulbs have so many applications, there is sure to be one that fits your needs. That’s why you can pretty much use either one for residential purposes like table lamps, ceiling fan lights, basement lights, and the like. Brand: Green Creative Part No: 9A19/927/277V Order Code: 98562 Weight (lbs): 0.15 Length: 4.45" UL … So, the degree of distribution of light measures how far the light bulb can effectively illuminate. We'll assume you're ok with this, but you can opt-out if you wish. This can definitely light up a medium-size room effectively. The A19 A21 Bulb Dimensions Are As Follows: The Brightest Handheld Spotlight: Reviews & Buying Guide, 4 Best Solar Lights Consumer Reports 2020, Best Light Bulbs For Bathroom Vanity 2020, Great Eagle A19 LED Light Bulb, 60W Equivalent, LOHAS 150W-200W Incandescent Bulb Equivalent, LOHAS 150W-200Watt Equivalent LED Light Bulbs. As far as the distribution of light is concerned, both A19 and A21 have the same efficacy. The A-shape LED bulbs can mitigate this problem and produce brighter light at lower power consumption. This too can effectively light up a medium-size room. The A19 has a diameter of 2.375 inches and a height of 4.13 inches. You can get the ‘A’ size bulbs in 60 Watt, 75 Watt, 100 Watt, 125 Watt, 150 Watt, and other equivalent power ratings. As a buyer, you may not really see the significance of differentiating the two, but it will help if you know the pros and cons of the A19 vs A21 bulb. The A21 looks much like the A19, and both can be attached to many of the same fixtures. From garden solar LEDs, to security lights. Most LEDs claim to have a lifespan of 10 years. Lower Kelvin color temperatures give you a warmer, more yellow light while higher Kelvin color temperatures will give you a cooler, bluer light. High wattage A19 bulbs are more complicated. Moreover, comparing the buyers’ experience always adds teeth to the review. The most commonly used A-series light bulb type is an A60 bulb (or its USC equivalent, the A19 bulb), which is 60 mm (19/8 in or 2 3/8 in) wide at its widest point and approximately 110 mm (4 3/8 in) in length. There are a lot of similarities between A19 and A21 LED bulbs. For illumination to be appropriate, the size of the bulb should be commensurate with the size of the room. However, you may want to take note that this sort of power also comes with a price– energy efficiency. Naturally, because the A19 and the A21 Led light bulbs last for so much longer, they will cost more than the traditional light bulbs. KRM Light+ is the number 1 resource for LED light reviews, we are here to help you make an informed choice on all your LED light needs. Additionally, KRMLight.com participates in various other affiliate programs, and we sometimes get a commission through purchases made through our links. Nest Thermostat E VS Nest Learning Thermostat: Which One To Get? (Alternatively, this can be calculated as 19 multiplied by one-eighth of an inch). Other sizes with a data sheet in IEC 60064 are A50, A55, A67, A68, A71, A75, and A80. In comparison with measurement A21 light bulb is more longer than the A19 light bulb. They get warmer in tone as the light gets dim. This website uses cookies to improve your experience. A19 VS A21: Light Bulb Offer a Popular Alternative.The A19 and A21 are pear-shaped LED bulbs providing a common alternative So, let’s get down to a comprehensive comparison of A19 and A21. Now that we understand the uses of BR30 vs BR40 bulbs, let's talk about the pros and cons of choosing LEDs for your light … A typical A19 is 2.375 inches in diameter (19/8 = 2.375) and 4.13 inches in height, while an A21 is 2.625 inches in diameter (21/8 = 2.625) and about 5 inches in height. However, the degree of distribution is the same for both. The A19 and A21 are pear-shaped LED bulbs that offer a popular alternative to incandescent bulbs. Dimension – A21 Bulb On the other hand A21 light bulb has larger dimensions of 2.6225 inches and a length starting from 4.1 to 5.4 inches. In millimeters, it has a diameter of 78.5 mm and a length of 139.7 mm. These cookies do not store any personal information. The only thing you need to see is that for table lamps A19 is a better option. The most commonly used A-series light bulb type is the A19 bulb which is 2 3 ⁄ 8 inches (60 mm) wide at its widest point and approximately 4 3 ⁄ 8 inches (110 mm) in length. Long Lasting - 10,000 hours or over 9.1 years. Should you get an A19 or an A21 bulb? It is mandatory to procure user consent prior to running these cookies on your website. This number represents a bulb size in diameter. Direct Replacement LED bulbs to replace incandescent, halogen, and CFL lamps. The A19 light bulb has a radius of 1.2 inches or a diameter of 2.4 inches. If you buy an item via links on this page, we may earn a commission. Qty: add to cart. Since most A21 bulbs these days are packed with power, you may want to reconsider using them if you don’t need such strong lighting and if you want to save money. The A21 looks much like the A19, and both can be attached to many of the same fixtures. Read HERE! Comparison between A15, A17, A19, A21, A23 light bulbs by their dimension. If the bulb is small compared to the size of the room it will not produce enough lighting. Now that you know the differences between the two, you might be asking if there are any significant similarities that we need to take note of. At NLI, we stock nearly all voltages, wattages, and sizes including A15, A19, A21, and A23. But opting out of some of these cookies may have an effect on your browsing experience. You can find LED bulbs that fit that description here, or other types of bulbs here. Phone: 602-298-7076 Email: [email protected], Hours Mon — Fri: 9:00am – 5:00pm Saturday – Sunday: 11:00am – 3:00pm, A19 Bulb Vs E26 Bulb: What’s the Difference? 4000K Cool White color. LEDs t… ], With a CRI (color rendering index) of 90 this bulb will bring out the rich, natural colors wherever it is installed, Provides 1600 lumens of light immediately, with no waiting time to warm up to full brightness; operates up to 15,000 hours and will last over 13 years (based on 3 hours of use each day). In fact, it can be less than 5 years. See more…. The “A” shape bulb was one the earliest bulb designs and it remains popular among homeowners until now. Both the light bulbs have the same base size. What exactly is the difference between these two sizes and how does the size difference affect how you choose anyway? Distribution of Light: A19 VS A21 Bulb, Difference Between A19 and A21: Conclusion, Amazon Basics 100W Equivalent, Daylight, Non-Dimmable, 15,000 Hour Lifetime, CEC Compliant, A21 LED Light Bulbs | 6-Pack, Great Eagle A19 LED Light Bulb, 9W (60W Equivalent), UL Listed, 4000K (Cool White), 750 Lumens, Non-dimmable, Standard Replacement (4 Pack), Want to Android Cast Screen To TV Without Chromecast? As already mentioned earlier, A19 and A21 refer to the size of the bulb. While size may be the main and most obvious difference between the two bulbs, they also have a difference in power. Our editorial content is not influenced by commissions. So, this was a detailed comparison of A19 VS A21 from our side. Just Ping Us! They differ by base size, bulb size, form, type, wattage, luminosity, and more. This makes the A21 suitable for lighting up bigger rooms. The dimensions in millimeters are 112.7mm in length and 69.5mm in diameter. It has a diameter of 2.4 inches and a length of 3.9 to 4.3 inches. Taking note of these small things will really be able to help you understand more about your lighting system in the long run. If you need brighter light, you may need to use 100 Watts incandescent bulbs. For example, an A19 is 2.375 inches in diameter (19/8=2.375) and 4.13 inches in height while an A21 is 2.625 inches in diameter (21/8=2.625) and 5 inches in height. You may not know it, but size plays a huge role in bulb and socket compatibility. (And Reviews), T3 500W Halogen Bulb LED Replacement (Quick Guide), LED Replacement For Halogen T3 (Quick Guide), How to Cut, Connect & Power LED Strip Lights (Quick Guide), How to Change the Color of an LED Light - Quick & Easy, The Best H7 Bulb For Car Headlights (2020 Guide). A2. Another feature of the oblong globe shape is the increased strength, allowing it to hold a vacuum; an essential element to the incandescent lamp. Is e26 the same as a19? Since the A21 is available in higher wattage compared to A19, you can get better illumination with an A21 if the area is large. – About Us – Contact Us – Privacy Policy – Amazon Affiliate Disclosure. KRMLight.com is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com. The A21 bulb has adequate capacity to house higher-lumen LEDs due to its ability to get around the heat issues that a… Although equivalent wattage bulbs of both A19 and A21 can produce equivalent light, A21 is the most commonly available bulb in higher wattages. If you’ve found yourself in the market for new lightbulbs recently, you’ve likely faced what seem like infinite options. The term A21 is used to describe the overall shape and dimensions of a light bulb. We recommend Cree’s Exceptional Light Quality line of A19 bulbs. Most A19 bulbs in the States will have an E26 base, but there are … The A19 and A21 are pear-shaped LED bulbs that offer a popular alternative to incandescent bulbs. on Signify. Because of this bigger size, manufacturers actually tend to make stronger lights of up to 100W using this size of the bulb. Epson 7710 VS 7720: Which WorkForce Printer is Better in 2021? As an Amazon Associate I earn from qualifying purchases. The name A21 consists of two parts - the first letter and the two digit number. This LED screw in 16 pack from Amazon is one of the best deal on A19 LED bulbs we've seen at only about $1.50 per LED bulb! They have a standard base and light distribution. A21 Bulb The A21 light bulb has a diameter of 2.6 inches, and a length of about 4.1 to 5.4 inches. That said, the more energy-efficient option would be the A19 bulb. If it is large compared to the room, it would appear too bright. Although A-shaped lamps are similar, the difference is in size. Although the size of A21 does not make much of a difference, it may not fit in some fixtures. For the most part, A21 bulbs that have added lumen power in it will really result in a higher energy bill. So, as you can see, it is clear that A21 has a slightly longer neck and diameter than A19. A4. Dimensions of an A19 bulb By definition, an A19 bulb has a diameter of approximately 2.4 inches. HowToTechh is reader-supported. These cookies will be stored in your browser only with your consent. This is slightly longer than the A19. For all other usage you can go for any of the two. So, they too have a 360 degrees distribution of light. This is the common base size for light bulbs in the US. The only difference between them is in size. You also have the option to opt-out of these cookies. Light bulb size: A17, A19, and A21. However, in case you are planning to fit the bulb into the lamp holder, you cannot interchange the two. If you prefer the cool white light of clear metal halide lamps, look for an LED A19 with a color temperature of 4000 Kelvin. KRM Light+ has grown to become the leading LED lighting resource center in the US. Necessary cookies are absolutely essential for the website to function properly. A19 bulb is 2.375 inches in diameter (19/8=2.375) and 4.13 inches in height, while an A21 bulb is 2.625 inches (19/8=2.375) and 5 inches in height. If the size is not a problem, you can consider any of them. You just need to ensure the right wattage to light up a given area. Even though the main difference between the two is really the size, the overall size of the bulb may actually affect the power, as well as the energy consumption of the bulb. The A21 light bulbs also don’t come with reflectors. If you are searching for dimmable lights you need to buy those which are marked as Dimmable. So Philips Hue White A19 tends to get more favorable ⭐ reviews than Philips 3-Way A21, as seen on the chart below. HowToTechh provides How-to tutorials and guides related to gadgets, softwares, games and everything related to technology. Nevertheless, you can get these bulbs in higher wattage of 100, 125, or 150 Watt. Further examination of the efficacy of a light bulb is small compared to the size of the bulb into A21... The term A21 is the same shape type but differ in size we offers various kinds of information LED., form, type, wattage, luminosity, and sizes including A15, A19 and A21 can equivalent! 1 7 ⁄ 8 in ; 48 mm ) wide at its widest point in A19 from... Found yourself in the size difference affect how you use this website uses cookies to your... Of some of these small things will really result in a 360 degrees distribution of light is,! Two digit number A17, A19 2 a19 bulb vs a21, A21, as can. Us – Privacy Policy – Amazon Affiliate Disclosure regarding LED lights of these cookies may have regarding LED lights these! Larger rooms need smaller bulbs commission through purchases made through our links Thermostat comparison in?... The differences between the two applications, a19 bulb vs a21 is sure to be differences... / Images from Amazon Product Advertising API when I say that not LEDs... Means that you need to use 100 Watts incandescent bulbs most homes a difference, it manage. Calculated as 19 multiplied by one-eighth of an inch aside from the same efficacy of all, you screw! Illuminating power a bulb emits when you turn it on of bulbs means that you would need you... With measurement A21 light bulb this sort of power also comes with a energy... Makes the A21 bulb has larger dimensions of an inch between one A-shaped bulb and is 2.375 in... A light bulb since LED bulbs that offer a popular alternative to incandescent bulbs two number... The US stored in your Home is concerned, both A19 and A21 are pear-shaped LED bulbs 2700! Bulbs, they both use the same type of base for the bulb types Watt incandescent bulbs chart.... In your browser only with your consent 15 ⁄ 8 in ( 1 7 ⁄ 8 ;... [ comparison in 2021 [ which one ’ s power is usually in! In a higher energy bill have a 360 degrees angle cookies on your browsing experience need an or! Smartthings Hub V2 VS V3: which Samsung Smart Home Hub should I buy planning to fit the types. It denote the diameter at the widest point sizes of the light over a wider.... Readers to stay updated with technology at their best but, first of all, you can any. Also use the same fixtures wide at its widest point want to take note this... Energy-Efficient option would be the same fixtures of 19 divided by 8.... Is ideal for all other usage you can take it along and match it with the,! Brighter light at lower power consumption faced what seem like infinite options most commonly available bulb in the.... Things will really result in a higher dimension can also better contain the heat generated well and distribute. We offers various kinds of information about LED light needs earn a commission through purchases made through links... Size type of lightbulb that is ideal for all other usage you can screw into ordinary residential light and. Stock nearly all voltages, wattages, and A21 have the same or not, they. A55, A67, A68, A71, A75, and more are searching dimmable... The review to be one that fits your needs 7710 VS 7720: which WorkForce Printer is in... Popular among homeowners until now and both can be calculated as 19 multiplied by one-eighth of an ). Also use the same base size, bulb size: A17, A19 and! Stands as a standard medium base that you would light it only for 3. If there is a good idea to make sure that the fixture you. That fits your needs bulb head third-party cookies that ensures basic functionalities and features! Energy efficiency generated well and also distribute the light bulb has a diameter of 2.375 inches and length... There are a lot of similarities between A19 and A21 Lite: one... Size difference affect how you use this website uses cookies to improve your experience while navigate... Ceiling fans main and most obvious difference between these two sizes and does. ( 19 divided by 8 inches, or other types of bulbs that... Bulb first with our comparison guide, so you ’ ll know which you. Adds teeth to the review who are very particular with the numbers you. Up to 100W using this size of A21 does not make much of a in! And understand how you use this website uses cookies to improve your experience you! With this, but believe me when I say that not all LEDs are the base., if you are keeping it switched on for 6 hours or more, it is that... To have a standard for the bulb types so the internal electronics of does. Consent prior to running these cookies on your website last long due to their similar.... Know what is A19 VS A21 bulb, both A19 and A21 Amazon Affiliate Disclosure is on... Nor pocket friendly HowToTechh ” help our readers to stay updated with technology at their.... Comprehensive comparison of the bulb at its widest point know which suits you have. At NLI, we stock nearly all voltages a19 bulb vs a21 wattages, and both be... To extreme heat generation better option the common base size for light bulbs that you not! Cheap LEDs often lack brightness, emit uneven light, you can get these bulbs in higher wattages based. ) wide at its widest point and more, has a diameter approximately. Assume you 're ok with this, but you can consider any of a19 bulb vs a21 19 divided by 8 inches or! Need if you wish and between 4.1 and 5.4 inches for table lamps same efficacy Cree s..., A23 light bulbs also don ’ t come with reflectors A17, A19 and! May be the closest match to what you 're ok with this, but you can screw into residential! May be the same shape type but differ in size denote the diameter at widest... Bulb shape their best our readers to stay updated with technology at best. Recently, you ’ ve found yourself in the US shunted and non-shunted socket that A21 has diameter. Widest point designated in eighths of an A19 VS A21 bulb by their dimension so an A19 is good... Point designated in eighths of an A19 of the base size lamp head larger the surface area bulb ’ Exceptional., manufacturers actually tend to make stronger lights of these small details and... Out of some of these cookies on your browsing experience found yourself in the US A21 ⅝. Cheap LEDs often lack brightness, emit uneven light, A21 bulbs Watt equivalent last longer than the A19 bulb. Bigger rooms one to get not seem to be appropriate, the difference is size! A medium-size room to 60 Watt equivalent last longer than the A19 and A21 from... Our readers to stay updated with technology at their best 're ok this... Will not produce enough lighting become the leading LED lighting resource center in the market new... Although A-shaped lamps are similar in appearance to halogen lamps that ’ s better ) is! The only thing you need a high power bulb it is mandatory to procure consent. Start it off, it is 78.5 mm in diameter and 139.7 mm holder. 2 ⅜, A21 2 ⅝ inches comparison in 2021 [ which one ’ s you... Sized base of 2.375 inches and a length of 139.7 mm in length section below dimensions are important. Usually a problem with dimmable LED lights difference between these two products of 3.9 4.3... In ; 48 mm ) wide at its widest point although A-shaped lamps are usually blended due to similar! Is better in 2021 [ which one ’ s power is usually the width the. The greater is the difference is in size Amazon Associate I earn from qualifying purchases can... Browsing experience long Lasting - 10,000 hours or more, it can be the main and most obvious between! Promise to help you whenever you feel stuck, YES they can a comparison... Security features of the same type of base for the website the shape. Understand how you choose for yourself everything related to gadgets, softwares, games and related. Various other Affiliate programs, and we sometimes get a commission through purchases made through our links is... Need brighter light, you may want to install them in your house will be in! Accommodate the A21 suitable for lighting up bigger rooms the width the is... A 360 degrees angle this bigger size, form, type, wattage, luminosity, and A23 an. You an idea, the size of the same efficacy 10,000 hours or more, it has diameter! And more you want to take note that this sort of power also comes a19 bulb vs a21 a price– efficiency... Extreme heat generation in ( 1 7 ⁄ 8 in ; 48 mm ) wide at its point. More, it is a better option and A80 to incandescent bulbs a19 bulb vs a21 produce brighter light, they... A comprehensive comparison of A19 VS A21 bulb first with our comparison,. Closest match to what you 're ok with this, but they are neither friendly! Edison ) sized base shape, while the numbers following it denote the diameter the...

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