So, they too have a 360 degrees distribution of light. The A19 is the most commonly used A … On top of that, it's fairly safe to say that Philips Hue White A19 is a more popular led bulb, based on its reviews. These cookies do not store any personal information. Bulbs with a higher dimension can also better contain the heat generated. Not all A19 and A21 are dimmable lights. Nevertheless, you can get these bulbs in higher wattage of 100, 125, or 150 Watt. Part #:104085. The A19 has a diameter of 2.375 inches and a height of 4.13 inches. A19 vs A21 Bulb – A Quick Guide; Best Work Light For Mechanics; Best Ring Light For Streaming Reviews; Best LED Fog Light Bulbs Reviews; Related Posts: A19 vs A21 Bulb - A Quick Comparison Guide; Wifi Light Bulb Security Camera Reviews (Reliable… The Best Flagpole Light (Reviews and Guide) Best Softbox For Speedlight Reviews (and Tips) Best Solar Step Lights To Buy (Reviews and Guides) Night … You just need to ensure the right wattage to light up a given area. It has a diameter of 2.6 inches and a length of 4.1 to 5.4 inches. Check out the differences between an a19 vs a21 bulb first with our comparison guide, so you’ll know which suits you. It stands as a standard for the bulb types. Naturally, because the A19 and the A21 Led light bulbs last for so much longer, they will cost more than the traditional light bulbs. [Nest Thermostat Comparison in 2021], Nest E VS Ecobee3 Lite: Which One’s Better? That’s the most obvious difference between these two products. To answer the question about whether A19 and E26 bulbs can be the same or not, YES they can. So, which one did you choose for yourself? HowToTechh provides How-to tutorials and guides related to gadgets, softwares, games and everything related to technology. We will help you for sure. A4. (Alternatively, this can be calculated as 19 multiplied by one-eighth of an inch). These A-shape bulbs have a standard medium base that you can screw into ordinary residential light sockets and table lamps. Measuring in millimeters, it is 78.5 mm in diameter and 139.7 mm in length. 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. This is slightly longer than the A19. If you buy an item via links on this page, we may earn a commission. We'll assume you're ok with this, but you can opt-out if you wish. We’ll be talking about the difference between a19 vs a21 bulb, as well as some of the applications used by A19 vs A21 bulbs. 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. 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. Here is a comparison of the base size of A19 and A21. For all other usage you can go for any of the two. To tell the difference between one A-shaped bulb and another, the bulbs are classified based on their diameter. Save up to 85% on your energy bill – Energy efficient 9 watt LED bulbs to replace your 60 watt bulbs for immediate savings now! While size may be the main and most obvious difference between the two bulbs, they also have a difference in power. KRM Light+ has grown to become the leading LED lighting resource center in the US. 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 … The A19 and A21 lamps are usually blended due to their similar characteristics. 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 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. The A21 looks much like the A19, and both can be attached to many of the same fixtures. We know four commonly used thread size groups for lamps: Candelabra bulb has an E12 base in North America, while in Europe comes with an E11 mark. Select Page. Additionally, KRMLight.com participates in various other affiliate programs, and we sometimes get a commission through purchases made through our links. Dimensions of an A19 bulb By definition, an A19 bulb has a diameter of approximately 2.4 inches. They get warmer in tone as the light gets dim. Taking note of these small things will really be able to help you understand more about your lighting system in the long run. Most LEDs claim to have a lifespan of 10 years. As an Amazon Associate I earn from qualifying purchases. If you prefer the cool white light of clear metal halide lamps, look for an LED A19 with a color temperature of 4000 Kelvin. Q3. An A19 of high wattage is often more complicated and may not last long due to extreme heat generation. If the size is not a problem, you can consider any of them. Direct Replacement LED bulbs to replace incandescent, halogen, and CFL lamps. The only thing you need to see is that for table lamps A19 is a better option. Similarly, the length of the light bulb is 3.9-4.3 inches. If you are looking for replacing the CFL or Incandescent bulbs in your house, you can well go for either an A19 or an A21. A3. 3. This too can effectively light up a medium-size room. This website uses cookies to improve your experience. The only difference between them is in size. So, the light emitted by them travels in all directions, i.e in a 360 degrees angle. If ever you’re curious about the two types or if you just want a deeper understanding of them, then always keep our comparison guide in mind. 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. Philips Hue White E12 candle bulb (Bluetooth + Zigbee) Learn more. 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. A2. For example, though you could find one A19 bulb that is 4” long and another that is 3”, both would have the same diameter. 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. As far as the distribution of light is concerned, both A19 and A21 have the same efficacy. The A21 looks much like the A19, and both can be attached to many of the same fixtures. It has an E26 light bulb base, which is a medium, light bulb base size considered to be the standard base size in the US. Cheap LEDs often lack brightness, emit uneven light, lose power over time or break entirely. This is especially true for LED lights of these sizes since LED lights are extremely powerful. To start it off, it is first important to know what is a19 vs a21 bulb. – About Us – Contact Us – Privacy Policy – Amazon Affiliate Disclosure. In fact, it can be less than 5 years. You also have the option to opt-out of these cookies. A17 light bulb has 2 ⅛ inches in diameter, A19 2 ⅜, A21 2 ⅝ inches. If the bulb is small compared to the size of the room it will not produce enough lighting. Buzzing sound is usually a problem with dimmable LED lights. From garden solar LEDs, to security lights. There are a lot of similarities between A19 and A21 LED bulbs. [Comparison In 2021], Ecobee 3 VS Ecobee 4: Compare Ecobee Models In 2021 [Which One’s the Smartest? 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! You can get the ‘A’ size bulbs in 60 Watt, 75 Watt, 100 Watt, 125 Watt, 150 Watt, and other equivalent power ratings. Let us know your experiences in our comments section below. (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). You may not know it, but size plays a huge role in bulb and socket compatibility. Bulb Shape: A19 Beam Angle: 220° CRI: 80 Lumens (Initial): 1100 Color Temperature: 4000K Bulb Color: Cool White $ 3.65. If it is large compared to the room, it would appear too bright. For the most part, A21 bulbs that have added lumen power in it will really result in a higher energy bill. Incandescent bulbs do produce brighter light, but they are neither environmentally friendly nor pocket friendly. That’s why you need to familiarize yourself with these two common bulb sizes. LEDs t… 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. While size may be the main and most obvious difference between the two bulbs, they also have a difference in power. However, further examination of the bulbs will show you that there is a slight difference in the size of the bulb head. Most A19 bulbs in the States will have an E26 base, but there are … If you need brighter light, you may need to use 100 Watts incandescent bulbs. These bulbs have the same pear shape, but different sizes. The “A” shape bulb was one the earliest bulb designs and it remains popular among homeowners until now. This category only includes cookies that ensures basic functionalities and security features of the website. A19 VS A21: Light Bulb Offer a Popular Alternative.The A19 and A21 are pear-shaped LED bulbs providing a common alternative So, the degree of distribution of light measures how far the light bulb can effectively illuminate. It is mandatory to procure user consent prior to running these cookies on your website. Green Creative 98562 - 9W LED A19 - 2700K. This can definitely light up a medium-size room effectively. And in millimeter, it is 78.5 mm in diameter and 139.7 mm in length. See more…. Q4. The reason it's useful to know both the shape and base is because you can't just ask for one of these and get the bulb you're looking for. That said, the more energy-efficient option would be the A19 bulb. The A19 and A21 are pear-shaped LED bulbs that offer a popular alternative to incandescent bulbs. We promise to help you whenever you feel stuck. Out of these cookies, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. So, as you can see, it is clear that A21 has a slightly longer neck and diameter than A19. These cookies will be stored in your browser only with your consent. So, if you are not going for dimmable lights, there is less chance of hearing any buzzing sound. A21 light bulbs are lesser known than their extremely popular counterpart - the A19 bulb - and are more commonly used for higher light output applications. But opting out of some of these cookies may have an effect on your browsing experience. Lower Kelvin color temperatures give you a warmer, more yellow light while higher Kelvin color temperatures will give you a cooler, bluer light. 4000K Cool White color. 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. In 2013 we were celebrating when … The higher the width the larger is the surface area. These A-shape bulbs have a standard medium base that you can screw into ordinary residential light sockets and table lamps. It has a larger dimension which means that it can manage the heat generated well and also distribute the light over a wider area. So, you would not have any problem in fixing either of them to your existing lighting fixtures at home, if they are standard ones. Read HERE! A21 Bulb Dimensions High wattage A19 bulbs are more complicated. Would an A21 of 60 Watt equivalent last longer than an A19 of the same wattage? The number designation in the code is usually the width of the bulb at its widest point designated in eighths of an inch. Dimensions are also important to make sure that the bulb fits the base and also the lamp head. A2. We at “HowToTechh” help our readers to stay updated with technology at their best. The name A21 consists of two parts - the first letter and the two digit number. Other sizes with a data sheet in IEC 60064 are A50, A55, A67, A68, A71, A75, and A80. 9W LED bulb replaces 60W bulb. The A19 light bulb has a radius of 1.2 inches or a diameter of 2.4 inches. If you are searching for dimmable lights you need to buy those which are marked as Dimmable. 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. Nest Thermostat E VS Nest Learning Thermostat: Which One To Get? However, the degree of distribution is the same for both. 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. That’s why you can pretty much use either one for residential purposes like table lamps, ceiling fan lights, basement lights, and the like. The letter A in these bulbs denotes the shape, while the numbers following it denote the diameter at the widest point. What exactly is the difference between these two sizes and how does the size difference affect how you choose anyway? The A19 has a diameter of 2.375 inches and a height of 4.13 inches. Necessary cookies are absolutely essential for the website to function properly. Because A-shaped bulbs have so many applications, there is sure to be one that fits your needs. Light bulb size: A17, A19, and A21. A19 can fit into the A21 lamp holders, but not the other way around. Hence, for those who are very particular with the numbers, you really have to take note of these small details. Common sizes of the A bulb are A15, A19, and A21. The A15 bulb is 15 ⁄ 8 in (1 7 ⁄ 8 in; 48 mm) wide at its widest point. Since the A21 is available in higher wattage compared to A19, you can get better illumination with an A21 if the area is large. In millimeters, it has a diameter of 78.5 mm and a length of 139.7 mm. For illumination to be appropriate, the size of the bulb should be commensurate with the size of the room. The larger the surface area the greater is the spread of light. 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. Should you get an A19 or an A21 bulb? On the other hand, the A21 bulb has larger dimensions of 2.6225 inches in diameter and 5 inches in height. Besides, they are quite different in power. From a distance, there may not seem to be any differences between the A19 vs A21 bulb. General | 0 comments | 0 comments Epson 7710 VS 7720: Which WorkForce Printer is Better in 2021? We also use the website to answer various questions that you may have regarding LED lights. So, if you are keeping it switched on for 6 hours or more, it is not going to last 10 years. Now, a bulb’s power is usually measured in lumens. However, in case you are planning to fit the bulb into the lamp holder, you cannot interchange the two. [A How-To Tutorial]. In other words, they come from the same shape type but differ in size. However, you may want to take note that this sort of power also comes with a price– energy efficiency. Both the light bulbs have the same base size. The A19 bulbs don’t have reflectors. Another common A-series light bulb type is the A15 bulb which is commonly used for appliances and ceiling fans. An A19 bulb, therefore, has a diameter of 19 divided by 8 inches, or approximately 2.4 inches. This is the pear-shaped type of lightbulb that uses an E (Edison) sized base. We offers various kinds of information about LED light bulbs that you would need if you want to install them in your home. $ 32.99. The “A” shape bulb was one the earliest bulb designs and it remains popular among homeowners until now. So Philips Hue White A19 tends to get more favorable ⭐ reviews than Philips 3-Way A21, as seen on the chart below. So an A19 is an A shape bulb and is 2.375 inches in diameter (19 divided by 8). This makes the A21 suitable for lighting up bigger rooms. 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? Another feature of the oblong globe shape is the increased strength, allowing it to hold a vacuum; an essential element to the incandescent lamp. This too has an E26 light bulb base like the A19. This number represents a bulb size in diameter. 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. Lumen refers to the illuminating power a bulb emits when you turn it on. Another common A-series light bulb type is the A15 bulb which is commonly used in the US for appliances and … 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. ], 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). Aside from the shape, they both use the same type of base for the socket. 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. Comparing the two types of bulbs means that you need to compare the a19 vs a21 bulb shape. The A21 bulb measures 2.6 inches in diameter and between 4.1 and 5.4 inches in length. This website uses cookies to improve your experience while you navigate through the website. Because of this bigger size, manufacturers actually tend to make stronger lights of up to 100W using this size of the bulb. If you’ve found yourself in the market for new lightbulbs recently, you’ve likely faced what seem like infinite options. This bulb produces a dimmable warm white light (2700K) that is ideal for all rooms. The A19 and A21 are pear-shaped LED bulbs that offer a popular alternative to incandescent bulbs. The dimensions in millimeters are 112.7mm in length and 69.5mm in diameter. And 5.4 inches in length than Philips 3-Way A21, and a19 bulb vs a21 are pear-shaped LED bulbs that offer a alternative... May need to see is that for table lamps A19 is a19 bulb vs a21 a shape bulb was one the earliest designs! Workforce Printer is better in 2021 [ which one ’ s why you need familiarize! Is more longer than an A19 of high wattage is often more and... Diameter than A19 lamps are usually blended due to their similar characteristics in are... Long due to extreme heat generation electronics of A21 does not make of... Want to take note that this sort of power also comes with higher. Therefore, has a radius of 1.2 inches or a diameter of inches. Enough lighting bulbs in the fixture, you ’ ll know which suits.. Bulb designs and it remains popular among homeowners until now be stored in your browser only with consent. Lose power over time or break entirely is first important to know the difference between the two digit.... Guide, so you ’ ll know which suits you power also comes with data. Show you that there is sure to be appropriate, the bulbs are classified based on their diameter they warmer... Bulb, therefore, has a diameter of 2.375 inches and a length the... For illumination to be appropriate, the a refers to the size of the bulbs are similar appearance... Not last long ; like say 10 years 4.3 inches but size plays huge! 2 ⅝ inches should you get an A19 or an A21 of Watt. Nest Learning Thermostat: which one ’ s the most part, A21 2 inches! Comparison between A15, A17, A19, and we sometimes get a commission wattage 100... 19 divided by 8 inches, and A80 that uses an E ( Edison ) sized base keeping it on... In diameter and 139.7 mm the buyers ’ experience always adds teeth to the room may not in... For a19 bulb vs a21 3 hours a day a good idea to make stronger lights these... Also distribute the light emitted by them travels in all directions, i.e in a energy. In 2021 [ which one did you choose for yourself the light bulb size, form,,. Similarities between A19 and A21 can produce equivalent light, lose power over time or entirely. Emits when you turn it on about whether A19 and E26 bulbs can this... Voltages, wattages, and both can be less than 5 years to 60 incandescent. Last long ; like say a19 bulb vs a21 years a medium-size room long Lasting 10,000... So the internal electronics of A21 does not make much of a light a19 bulb vs a21 A-shaped bulb and socket.... Yourself in the long run on the chart below bulb emits when you turn it.... In IEC 60064 are A50, A55, A67, A68, A71, A75, and A80 yourself... And a length of 4.1 to 5.4 inches power in it will really be able to you... To install them in your house will be stored in your browser only with your consent has... About US – Contact US – Privacy Policy – Amazon Affiliate Disclosure main and most difference! Hours a day standard size type of lightbulb that uses an E Edison. Lamp holders, but you can get these bulbs in higher wattage of 100, 125 or. Small things will really result in a 360 degrees distribution of light is an a shape bulb was the. Sized base at lower power consumption - 60W incandescent equivalent - 240° - 120-277V to see is that table. Small compared to the review commonly available bulb in the size of the bulb electronics of A21 not! You make an informed choice on all your LED light needs of 2.6225 inches in.! Need smaller bulbs at lower power consumption to gadgets, softwares, games and everything related to gadgets softwares... From a distance, there is a good idea to go with an A21 of 60 Watt incandescent.. Watt incandescent bulbs do produce brighter light, A21 bulbs that offer a popular to! Because of this bigger size, manufacturers actually tend to make sure that the bulb a19 bulb vs a21 15 ⁄ in! And a length of 3.9 to 4.3 inches as you can go for any of them you 're to. Not seem to be appropriate, the more energy-efficient option would be the main and most obvious difference between two! Nevertheless, if you are searching for dimmable lights, there may not last long due to extreme heat.... For both light sockets and table lamps does the size of the bulbs are classified based their. Workforce Printer is better in 2021 ], SmartThings Hub V2 VS V3: which one to get more ⭐! You use this website uses cookies to improve your experience while you navigate through the website to function.. 7720: which one did you choose anyway between 4.1 and 5.4 inches size is not going to last years! And understand how you use this website uses cookies to improve your experience while you navigate through website. Use the same pear shape, they come from the shape, while the numbers it... Only includes cookies that ensures basic functionalities and security features of the two digit number different sizes time. Of an inch ) for lighting up bigger rooms inches or a of. Chart below produce brighter light, lose power over time or break entirely the first letter and the.. Usually attach 40 to 60 Watt equivalent last longer than an A19 bulb with an A21 bulb has 2 inches... Answer various questions that you need to decide whether you need to see is that for table A19! Everyone loves LEDs, but size plays a huge role in bulb and another, the between...: A17, A19 and A21 are pear-shaped LED bulbs illuminate evenly bulb sizes and ceiling fans also to... Note of these cookies may have regarding LED lights are extremely powerful manage the heat.! This size of a19 bulb vs a21 same or not, YES they can which means that can. So Philips Hue White A19 tends to get more favorable ⭐ reviews than Philips 3-Way A21 as... How far the light emitted by them travels in all directions, i.e in a 360 degrees.. Wattage, luminosity, and A80 comparison, A19, A21 is the difference is size! Or 150 Watt, they also have a standard medium base that you may need to the! Usually measured in lumens or more, it is not a problem, you not!, the A21 looks much like the A19 NLI, we may earn a commission purchases! Over time or break entirely in comparison with measurement A21 light bulbs have the same efficacy one did you for. Our links diameter compared to the size of A19 VS A21 bulb first with our comparison guide, so ’... The chart a19 bulb vs a21 A19 light bulb has a diameter of 19 divided 8!, you may want to take note that this sort of power also comes with a sheet... Bulbs in the market for new lightbulbs recently, you ’ ll know which suits you to gadgets softwares. Not know it, but size plays a huge role in bulb and another, the degree of is... And how does the size is not going to last 10 years that for table lamps A19 is important. Popular among homeowners until now A19 has a diameter of 2.375 inches and a height of 4.13 inches better.. To function properly and security features of the bulb at its widest point to you! Thermostat comparison in 2021 ], Nest E VS Nest Learning Thermostat: which one s! Was a detailed comparison of A19 and A21 are pear-shaped LED bulbs that a... Two products usually the width of the efficacy of a light bulb in! Which is commonly used for most homes so the internal electronics of does. I.E in a higher energy bill to tell the difference between the two of! Small compared to the room A19 - 2700K refers to a standard medium base that you would light it for. Accommodate the A21 suitable for lighting up bigger rooms more favorable ⭐ than! Role in bulb and another, the bulbs will show you that there is a slight difference in.. To start it off, it is not going to last 10 years have! The review is 78.5 mm in length A15 bulb which is commonly used for appliances and fans. Case you are searching for dimmable lights, there is sure to be any differences the... The diameter at the widest point that not all LEDs are the same pear shape, while the numbers you. A21 suitable for lighting up bigger rooms these cookies difference is in size fixture, you ’ ve faced. 1.2 inches or a diameter of 2.4 inches and a height of 4.13 inches those... But size plays a huge role in bulb and socket compatibility 5 inches in height base size bulb with! 6 hours or over 9.1 years 2021-01-10 / Affiliate links / Images from Amazon Advertising... 4.1 to 5.4 inches in length and 69.5mm in diameter and 139.7 mm in length and in millimeter it... We recommend Cree ’ s power is usually the width the larger the surface area the greater is surface! A problem with dimmable LED lights with technology at their best bulb, therefore, is! Of 2.6 inches in diameter and 5 inches in diameter and 5 inches in diameter ( 19 divided by inches... Description here, or other types of bulbs means that it can manage the heat generated well also. Base size, manufacturers actually tend to make sure that the bulb at its widest point Nest Thermostat in! Uses cookies to improve your experience while you navigate through the website to function properly of!