What size screw bulbs are there?

Are there different sizes of screw bulbs?

5 Common Thread Size Groups. E12 has a diameter of 12 mm, E17 has a diameter of 17 mm, E26 has a diameter of 26 mm, and E39 has a diameter of 39 mm. Most light bulbs in the United States are E26, and it is commonly referred to as “medium” or “standard” base.

How do I know what size screw bulb?

To know the base of a light bulb, identify if it is a screw type that has threads around the base, or a pin type that has 2 points of contact on the base. After that, measure the diameter of the screw base, or the distance between the two pins, in millimeters.

What are the sizes of bulbs?

Numbers in each code refer to the bulb’s diameter in one-eighths of an inch.

  • A15 bulb: 15/8 = 1-7/8″ diameter.
  • A19 bulb: 19/8 = 2-3/8″ diameter.
  • A21 bulb: 21/8 = 2-5/8″ diameter.
  • A25 bulb: 25/8 = 3-1/8″ diameter.
  • G11 bulb: 11/8 = 1-3/8″ diameter.
  • G14 bulb: 14/8 = 1-3/4″ diameter.
  • G16/G50: 16/8 = 2″ diameter.
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How do I know what base my light bulb is?

A further explanation of the light bulb base sizes, you can look at the letter-number references (E12, E17, and E26) to help understand a bulbs base style and size. The first letter designates the shape or form of the base, and the number represents the width of the base (normally in millimeters).

What are large screw in bulbs called?

Edison Screw Cap

Name Product Code Diameter
Candelabra Edison Screw (CES) E12 12mm
Small Edison Screw (SES) E14 14mm
Edison Screw (ES) E27 27mm
Giant Edison Screw (GES) E40 40mm

What does ES mean on a light 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.

Can I change bayonet to screw fitting?

A handy lamp socket converter, the B22 – E27 Lamp Socket Converter allows you to convert a B22 bayonet lamp socket into an E27 edison screw fitting without the need for re-wires.

What is Edison screw fitting?

Edison Screw light bulb is a lamp with a a screw fitting. The fitting is known as an E27 fitting. It is the most common fitting for a bulb or a lamp in modern lighting, replacing the traditional Bayonet (B22) fitting that used to be used in UK manufactured lamps.

What does A60 bulb mean?

By definition, an A19 bulb has a diameter of approximately 2.4 inches. In countries that use the metric system, A19 bulbs can also be called A60, where 60 refers to the diameter in millimeters. The length of an A19 bulb is typically 3.9 – 4.3 inches (100-110 mm) in length.

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Can I use A21 bulb instead of A19?

Are A19 lamps compatible in A21 lampholders? Yes, because A19 lamps are smaller in all dimensions than A21 lamps, they will fit in virtually all fixtures and lampholders designed for A21 lamps. Since they utilize the same E26 base, the A19 lamps will fit into the socket just fine.

What are light bulb socket sizes?

(For example, E12 has a diameter of 12 mm) There are 4 common sizes of screw-in sockets used for line-voltage lamps:

  • Candelabra: E12 (diameter of 12 mm)
  • Intermediate: E17 (diameter of 17 mm)
  • Medium or Standard: E26 (diameter of 26 mm)
  • Mogul: E39 (diameter of 39 mm)

Are E26 and A19 the same?

So to answer your questions in short, A19 and E26 is not the same. two different parts of the same bulb, but they are almost always combined. … “E26” on the other hand indicates what kind of base the bulb has. Most A19s will have an E26 base, but there are a few exceptions.

What is the screw in part of a light bulb called?

A lightbulb socket, light socket, lamp socket or lampholder is a device which mechanically supports and provides electrical connections for a compatible electric lamp. Sockets allow lamps to be safely and conveniently replaced (re-lamping).

What size is E17 base?


Designation Base major diameter (thread external) Name
E17 17 mm (0.669 in) Intermediate Edison Screw (IES), C9
E18 18 mm (0.709 in)
E26 26 mm (1.024 in) (Medium one-inch) Edison Screw (ES)
E27 27 mm (1.063 in) (Medium) Edison Screw (ES)
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What are the 3 types of light bulbs?

There are three basic kinds of light bulbs on the market: incandescent, halogen, and CFL (compact fluorescent light).