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GE Lighting
gelighting.com โ€บ inform โ€บ guide-light-bulb-sizes-types-shapes-and-codes
A Guide to Light Bulb Sizes, Types, Shapes, and Codes.
The numbers of the bulb indicate ... the โ€˜19โ€™ indicates that the bulb is 19/8ths inches in size. Similarly, A15 bulbs are smaller than A19 bulbs, though both fit in the standard household light bulb base (E26)....
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Reddit
reddit.com โ€บ r/interiordecorating โ€บ when is it better to use an a19 size bulb instead of a15?
r/interiordecorating on Reddit: When is it better to use an A19 size bulb instead of A15?
September 27, 2024 - For those who didnt know, like me, both of these bulb are a regular shaped bulb that we all know. The โ€œbulbโ€ part of this bulb is larger on the A19. A15 is smaller. They both fit in a regular light socket aka E26 socket

most common form factor of light bulb

A-series light bulb - Wikipedia
The A-series light bulb is the "classic" glass light bulb shape that has been the most commonly used type for general lighting service (GLS) applications since the early 20th century. It has โ€ฆ Wikipedia
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Wikipedia
en.wikipedia.org โ€บ wiki โ€บ A-series_light_bulb
A-series light bulb - Wikipedia
December 3, 2025 - The A15 bulb is ยท 15โ„8 in (1+7โ„8 in; 48 mm) wide at its widest point and 3.39 inches tall. In countries with a mains supply voltage of 100โ€“120 volts (e.g., Canada, Taiwan, US), A19/A60 light bulbs usually come with an E26 type Edison screw base (i.e. 26 millimeters in diameter).
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Commercial LED Lights
commercialledlights.com โ€บ home โ€บ types of light bulbs
Types of Light Bulbs | What You Need To Know
December 11, 2023 - Its โ€œAโ€ stands for Arbitrary (or Classic) shape, and โ€œ15โ€ indicates its diameter in eighths of an inch. So, an A15 bulb is approximately 1.875 inches in diameter.
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Cymakcanada
cymakcanada.ca โ€บ blogs โ€บ news โ€บ are-a15-and-a19-bulbs-interchangeable
Are A15 and A19 Bulbs Interchangeable ? โ€“ www.cymakled.ca
A15 and A19 bulbs can be interchangeable in some situations, mainly when they have the same base and wattage. However, you must be mindful of the differences in size and light quality to ensure you meet your lighting needs.
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Amazon
amazon.com โ€บ ask โ€บ questions โ€บ Tx28OBP6V3GPKDZ
Amazon.com: Customer Questions & Answers
There's a "bulb size" and a "base size." The bulb size is self explanatory. The A15's are smaller bulbs, while the A19's are larger. They both fit in a standard household medium base (E26 base.) Just make sure there is enough ventilation around area. You don't want a fire.
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CPS LIGHTING
cps-lighting.com โ€บ home โ€บ enterprise blogs โ€บ a15 bulb guide: everything you need to know
A15 Bulb Guide: Everything You Need to Know
October 2, 2024 - An A15 bulb is a type of light bulb known for its unique shape โ€“ itโ€™s smaller and more pear-shaped than the standard A19 bulb you might find in your bedside lamp. Despite its compact size, the A15 packs a punch when it comes to illuminating ...
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DYR
normanlamps.com โ€บ home โ€บ a-type leds
A-Type LEDs - LED A21, A19, and A15 sizes available from NLI
A15 bulbs at 15/8 inches (1.875 inches) are more compact, commonly used in ceiling fans, smaller fixtures, and appliances where the standard A19 would be too large or visually overwhelming. The energy savings with A-Type LEDs are substantial and measurable. A typical 9-watt A19 LED produces ...
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YouTube
youtube.com โ€บ watch
A15 vs A19 Light Bulb - Comparison - YouTube
A15 and A19 are the most common bulb types used in our homes. But do you know what do they mean and how they differ? Check out the video to find the comparis...
Published ย  August 31, 2023
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LEDMyPlace
ledmyplace.com โ€บ blogs โ€บ stories โ€บ your-guide-to-the-shapes-and-sizes-of-bulbs-and-bases
Your Guide To The Shapes And Sizes Of Bulbs And Bases!
November 27, 2020 - Arbitrary or type A bulbs are known as the โ€˜standardโ€™ light bulb size. These bulbs feature the classic household incandescent light bulb shape that resembles the letter โ€˜Aโ€™. The various A-style light bulbs you can find are as follows: A15, A17, A19, A21, A23, and A60.
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HomElectrical
homelectrical.com โ€บ shop by brands โ€บ sylvania led light & fixture - ledvance โ€บ sylvania light bulb & lamp โ€บ sylvania bulb: a15, a21, a19 lamp
Shop Sylvania Bulb: A15, A21, A19 Lamp | HomElectrical.com
The candelabra base also works ... in 1/8 of an inch so as that number increases, so does the size of the bulb. This means an A19 bulb measures 19/8 or around 2.375 inches in diameter. An A15 should measure around 15/8 or 1.875 inches....
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LightBulbs
lightbulbs.com โ€บ led bulbs / lighting โ€บ led light bulbs โ€บ led a-line / pear / tube
A15 LED Light Bulbs | LightBulbs.com
With a diameter of 1.875 inches, A15 bulbs are the smallest of the A-shaped family. Their most popular use is in signs and decorative lighting. The A19 bulbs are the most commonly used A-shaped bulbs. From lamps to ceiling fixtures, bathroom vanities to sconces, and so much more, thereโ€™s ...
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UK Electrical Forum
electriciansforums.net โ€บ electrical advice โ€บ diy electrical advice
A15 vs. A19 bulbs in ceiling fan
November 2, 2020 - Some A15 bulbs use a candelabra base, but my fixture uses the medium base sockets (E26), which is the same as the A19 bulbs. Physically, the A19s fit in the shade. Since the A19s are larger, they are closer to the shades than the A15, but there ...
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TuxGraphics
tuxgraphics.org โ€บ electronics โ€บ powersockets โ€บ light_bulb_types.html
Light fixtures and light bulb sizes
The A19 bulb has a glass diameter of 19*1/8inch. A15 with a E26 base. The A15 refers to the glass diameter of a US kitchen appliance or ceiling fan light bulb.
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DYR
normanlamps.com โ€บ home โ€บ a-type light bulbs
A-Type Light Bulbs - A15, A19, A21, A23 Bulbs | Norman Lamps
The most common is the A19, measuring 19/8 inches (approximately 2.375 inches) in diameter, which has become the standard household bulb size. Smaller A15 bulbs, at 15/8 inches in diameter, work perfectly in applications where space is limited, such as ceiling fan light kits, small table lamps, ...
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LightBulbs
lightbulbs.com โ€บ led bulbs / lighting โ€บ led light bulbs
A-Type Standard LED Light Bulbs | LightBulbs.com
With a diameter of 1.875 inches, A15 bulbs are the smallest of the A-shaped family. Their most popular use is in signs and decorative lighting. The A19 is the most commonly used A-shaped bulb. From lamps to ceiling fixtures, bathroom vanities to sconces, and so much more, thereโ€™s a use for ...
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Mapawatt
mapawatt.com โ€บ light-bulb-codes-shapes-sizes-and-bases
Light bulb codes - shapes, sizes and bases | Mapawatt
What most people visualize when the "light bulb" goes off in their head and probably the most common type of residential light bulb is the "A" shape. Common sizes of the A bulb are A15, A19, and A21. The number designation in the code is usually the width of the bulb at its widest point designated in eighths of an inch.
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RevoLights
revolights.com โ€บ bike lights โ€บ difference between a15 a19 light bulb: choose the right one
Difference Between A15 A19 Light Bulb: Choose the Right One
1 month ago - Wattage and Lumens: As an enthusiast for lighting up lives, youโ€™ll appreciate that A15 bulbs usually range from about 15 to 40 watts, making them ideal for creating a cozy, warm atmosphere.