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Laokoon Lamp Company > Lighting Help > A19 Light Bulb: Useful Lighting Knowledge 2022 [All-to-know]

A19 Light Bulb: Useful Lighting Knowledge 2022 [All-to-know]

Amanda Nguyen by Amanda Nguyen
December 26, 2021
Reading Time: 5min read
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A19 Light Bulb

A19 Light Bulb

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Beautiful light is better to light. The A19 Series is part of our new and improved LED lamp family, and it offers a unique blend of omnidirectional comfort, high color rendering, instant-on, and quiet dimming. Even better, the A19 light bulb is exceptionally energy efficient, lasting up to 6 times longer than low-cost LED bulbs and saving up to 88 percent over incandescent lamps. This material will be discussed in further detail in the sections below.

What does the term A19 mean?

The word A19 describes a light bulb’s overall form and dimensions. It has been used since the incandescent light bulb period, and it is still used for CFL and LED light bulbs.

A19 comprises two parts: the first letter and a two-digit number.

The “A” refers to the bulb’s overall form. The primary light bulb shape of an “A” bulb is sometimes compared to an upside-down pear.

The two digits following the letter denote the bulb’s diameter at its widest point, which is measured in eighths of an inch. The diameter of an A19 bulb is 19 divided by 8 inches or approximately 2.4 inches. (Alternatively, 19 multiplied by one-eighth of an inch can be calculated).

***Watch video for more information: What is an A19 Light Bulb?

Dimensions of an A19 light bulb

Dimensions of an A19 light bulb
Dimensions of an A19 light bulb

An A19 bulb has a diameter of around 2.4 inches by definition. A19 bulbs are also known as A60 bulbs in countries that use the metric system, where 60 refers to the diameter in millimeters. An A19 bulb typically measures 3.9 to 4.3 inches (100-110 mm) in length.

The ANSI C79.1 regulations define the standard size of an A19 bulb in North America. Varying bulb sizes have different maximum diameters for different wattages:

– 40W Type 210:

108 mm max length, 69.0 mm max diameter

– 40W Type 211:

112.7 mm max length, 69.5 mm max diameter

– 50W Type 206:

100 mm max length, 68.0 mm max diameter

– 50W Type 211:

112.7 mm max length, 69.5 mm max diameter

– 60W:

112.7 mm max length, 69.5 mm max diameter

– 75W:

112.7 mm max length, 69.5 mm max diameter

– 100W:

112.7 mm max length, 69.5 mm max diameter

If an A19 bulb is between 112.7 mm in length and 69.5 mm in diameter, it is generally considered within its dimensional standards.

***Read more: A21 Light Bulb: Dimension & Compatibility with Lamp Holders

A19 light bulbs always use E26, but not vice versa

A19 light bulb with E26 base
A19 light bulb with E26 base

A19 bulbs must permanently be mounted in a light fixture with an E26 base, according to ANSI requirements.

Although the terms A19 and E26 refer to various things, in this situation, all A19 bulbs use E26 lamp bases.

However, remember that the inverse is invalid: not all E26 bulbs are A19-shaped. Some E26 bulbs have radically different forms from a regular A19 or A-style bulb.

What about A19 CFL and A19 LED bulbs?

CFL and LED bulbs have begun to replace incandescent lights as energy-efficient lighting alternatives have become available. Because so many incandescent lights utilize the A19 form factor, CFL and LED, replacements have continued to use the same A19 shape to ensure that they can be used in existing A19 fixtures.

If you have an A19 fixture or table lamp, continue to hunt for A19 LED bulbs while purchasing LED lights.

***Read more: Best Natural Light Desk Lamp: Top 8 Best Choices For Office

A19 LED light bulb
A19 LED light bulb

How Much Brightness (Lumens or Watts) Should an A19 Lamp Have?

The incandescent wattage equivalence figures for most A19 LED bulbs will be presented. For example, the equivalent incandescent wattage of a 10W A19 LED lamp may be listed as “60W equivalent” to indicate that the brightness will be the same as a 60W incandescent light.

The metric lumens are the official unit of measurement for brightness. A 40W incandescent bulb produces 450 lumens, while a 60W bulb produces 800. The equivalent wattage calculations are industry-standard based on these relative lumen numbers.

Simply comparing the wattage equivalence numbers, or for a more precise comparison, the lumen output value is one straightforward approach to see if a new A19 lamp will provide enough light.

Which A19 Light Bulb Color Temperature (CCT) Should I Choose?

Which A19 Light Bulb CCT Should I Choose
Which A19 Light Bulb CCT Should I Choose

Unlike standard incandescent A19 lamps, LED bulbs can produce a wide range of colors. Look for a 2700K color temperature (CCT) rating if you want the same warm glow as an incandescent A19 bulb.

If you want something a little crisper, or something that seems like natural sunshine, go with something at 4000K or higher.

Finally, high CRI choices should be considered if you want to replicate the light of an incandescent bulb completely. A LED bulb with a low CRI will not expose colors as vividly as an incandescent bulb. CRI values above 90 are recommended for most residential applications, with 95 or higher being desirable.

What kind of light distribution does an A19 light bulb have?

What kind of light distribution does an A19 light bulb have
What kind of light distribution does an A19 light bulb have

Because they don’t have any built-in reflectors, A19 bulbs emit light at a 360-degree angle. An incandescent bulb’s filament emits the light it produces evenly outwardly.

Most A19 LED bulbs generate light at a wide-angle to simulate the light distribution of incandescent light, but some are better than others at this. A19 LED filament bulbs were introduced to produce an equal, fair distribution of incandescent filament. These bulbs have light in the same manner as a typical filament does but with far greater efficiency thanks to LED filament technology.

***Read more: Top 6 Best LED Filament Bulbs: Perfect Choice for Classic Style

Is an A19 light bulb the same as an A60 bulb? Are they interchangeable?

In countries that use the metric system, bulbs are referred to as A60 rather than A19. The 60 refers to 60 millimeters, which is roughly equivalent to 19 eighths of an inch. They are interchangeable in dimensions, but the screw bases are likely to be different.

Conclusion

Finally, the incandescent light bulb development was a watershed moment in our lives and industry. There are light bulbs strewn over the room. You may see light bulbs everywhere if you look around. Countless things changed when the light bulb was turned on. Uses of electricity include entertainment, mining, manufacturing, street lamps, illumination, industries, war, and entertainment. The light bulb is by far the most potent lighting source. And the A19 light bulbs are on your home’s to-do list.

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Contents

  1. What does the term A19 mean?
  2. Dimensions of an A19 light bulb
  3. A19 light bulbs always use E26, but not vice versa
  4. What about A19 CFL and A19 LED bulbs?
  5. How Much Brightness (Lumens or Watts) Should an A19 Lamp Have?
  6. Which A19 Light Bulb Color Temperature (CCT) Should I Choose?
  7. What kind of light distribution does an A19 light bulb have?
  8. Is an A19 light bulb the same as an A60 bulb? Are they interchangeable?
  9. Conclusion
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