Light Bulb Shape Code Chart

November 12, 2023 Post a Comment

Light bulb shape code chart

The code number of a bulb consists of a letter or letters followed by a number. The letter indicates the shape of the bulb and the number relates to the diameter of the bulb in eighths of an inch. The mosts commonly used household bulb is the A-19. The bulb is "A" type and the diameter would be 23/8".

What is a A19 bulb shape code?

Numbers in a bulb code indicate the size of the base, measured in millimeters or eighths of an inch, depending on the bulb. Take an A19, for example: letter 'A' indicates that the bulb comes in a standard household shape, and the '19' indicates that the base is 19/8ths inches in size.

What are the 4 types of bulbs?

What Are the Different Types of Light Bulbs?

Incandescent Bulbs. Source. Traditional incandescent light bulbs are still widely used but they're controversial due to their lack of efficiency.
Halogen Bulbs. Source. ...
Compact Fluorescent Lamps (CFLs) Source. ...
Light-Emitting Diode (LED) Source.

What is the standard light bulb shape?

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 a pear-like shape and is typically fitted to either an Edison screw or a bayonet cap base.

How do I know what bulb base I have?

The first letter designates the shape or form of the base, and the number represents the width of the base (normally in millimeters). For example, our 11S14 bulb has an E26 base — the "E" refers to the style which is an Edison screw-in, and the 26 means it has a 26 mm base width.

How can I tell what type of light bulb I have?

Bulbs shapes have an alphanumeric code. The letter tells you the general shape of the bulb and number tells you the width or diameter of the largest part of the bulb in eighths of an inch. For example, the common and well-known standard light bulb for a table lamp is also referred to as an “A19”.

What is the difference between A19 and A21?

The designations describe the shape of the base with the diameter measured in eighths of an inch. That means A19 and A21 bulbs have the same form, but the first is 2.375 inches in diameter. The larger model is 2.625 inches in diameter.

What is the difference between E26 and A19?

A19 refers to the shape and size of the bulb itself. "A" stands for Arbitrary -- just the name of the shape that's familiar to most of us. "19" refers to the size -- in this case, 19/8" (or 2 3/8") across. E26 refers to the type and size of the base -- the part that goes into the light socket.

Is E26 and A19 the same?

All A19 lamps have an E26 base, but not the other way around The standards that govern the dimensions and design of A19 light bulbs also dictate that it must use an E26 screw base. In other words, all A19 light bulbs also have an E26 base.

What are the 5 different types of lights?

5 Different Types of Light Bulbs

1- Incandescent Bulbs:
2- Fluorescent Lamps:
3- Compact Fluorescent Lamps (CFL):
4- Halogen Lamps:
5- Light Emitting Diode (LED):

What are the 6 different types of light?

The 6 Main Types of Light Bulbs and How to Use Them in Your Home

Incandescent.
Standard Fluorescent. ...
Compact Fluorescent (CFL) ...
Halogen. ...
Light-Emitting Diode (LED) ...
Smart Bulbs. ...
A Group (Traditional) ...
G Group (Globe)

What are the different types of light bulbs called?

There are four different types of light bulbs available for residential use: incandescent, halogen, fluorescent, and LED. These varieties have different characteristics including the quality of light emitted, the amount of energy used, and more.

Why are light bulbs different shapes?

In traditional bulbs, the light source needed to be equidistant from all sides of the glass casing to give out light that was uniform and omnidirectional to maximize efficiency. A round bulb shape allows for the central light source, such as the tungsten filament, to follow those criteria.

Are E12 and A19 bulbs the same?

E12 is a designation used for a type of lamp base used on a light bulb. You are likely familiar with E26 lamp bases - the standard screw-in lamp base, approximately 1-inch in diameter, commonly used in standard A19 lamps. E12 uses the same naming system as E26, whereby the letter "E" signifies an Edison screw base.

What does Type A mean for light bulbs?

Type A bulbs, also called standard bulbs, are the classic, pear-shaped bulb. They're used in both residential and commercial applications and screw in using an Edison screw. The most common of these bulbs are lamp bulbs or A19, which are used in all lamps, and A15 appliance bulbs.

What is an E12 bulb base?

The Candelabra base is also called an E12 base. You usually find that light bulbs with a Candelabra or E12 base are found in chandeliers, small nightlights, and small decorative bulbs. This type of light bulb base is less than half the size of a Medium/E26 light bulb base.

Are E12 and C7 the same?

Typically, C7 bulbs are made on an E12 sized base. C9 bulbs are made on an E17 sized base. They are so often manufactured in-line together that the terms for C7/E12 and C9/E17 are interchangeably misused. C7/C9 refers to the size and shape of the light bulb.

What is the difference between E12 and E17?

E12 is the smaller “candelabra” base. It's used for nightlight bulbs, and sometimes for decorative light bulbs used in chandeliers and over bathroom mirrors. E17, “intermediate” base, is in between these two sizes. It's sometimes used for desk lamps and appliance bulbs, but is not as common.

Does bulb shape matter?

It does matter what shape a light bulb is. The shape of the light bulb is important because it affects how the light is cast.

What is an E27 bulb?

E27 bulbs, often referred to a ES bulbs which is an acronym for Edison-screw, have a threaded base for use with compatible screw in fixtures. The base of an E27 light bulb is 27mm wide and is a popular fitting in a range of domestic settings for lamps and feature lights.