What is a standard light bulb socket size
Andrew Mccoy
Updated on April 06, 2026
E26 is the size of most light bulbs used in the U.S. It’s referred to as having a “medium” or “standard” base. 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.
What is a normal light bulb socket size?
The first and the most popular one is the Medium Screw Base (E26). This size is the most common for the incandescent and the LED Edison vintage bulbs. This size is the same as a standard household light bulb.
What size is my light bulb base?
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.
Is A19 and E26 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.Are E26 and G25 the same?
The G25 shape is usually pared with a E26 (medium) base, similar to that of a standard A19 and come in outputs ranging from 25 watts to 60 watts. G25 LED Bulb Replacements G25 shaped LED bulbs now exist and are a great replacement for decorative and vanity applications.
What is a E26 socket?
E26 is the size of most light bulbs used in the U.S. It’s referred to as having a “medium” or “standard” base. … It’s used for nightlight bulbs, and sometimes for decorative light bulbs used in chandeliers and over bathroom mirrors.
How do I know bulb size?
Bulb sizing is very straightforward and simple, it is based on the diameter of the bulb at its widest point, measured in eighths of an inch (⅛”). For example, the designation “T12” indicates a tubular bulb that is 12 eighths of an inch (12/8”) in diameter (or 1 ½”).
Is E26 a standard light bulb base?
The most common type of light bulb here in the United States has what is referred to as a “Medium” base or “Standard” base. … A Medium or Standard base light bulb is also referred to as an E26 base light bulb.What is an E26 bulb socket?
The term E26 refers to a light bulb’s cap or base – the bulb component that allows for both electrical and mechanical contact. The letter “E” in E26 refers to Edison Screw, the most standard of lamp bases, while the numerical “26” refers to its diameter in millimeters (approximately 1 inch).
What is a standard light bulb base?The most common bulb base in the US is the screw medium E26 base. It is used in most incandescent, nostalgic, LED, CFL and halogen light bulbs. The Candelabra E12 base is the second most common bulb base which is used for smaller decorative incandescent/nostalgic bulbs. The intermediate E17 base is not very common.
Article first time published onWhat size is E17 base?
DesignationBase major diameter (thread external)NameE1717 mm (0.669 in)Intermediate Edison Screw (IES), C9E1818 mm (0.709 in)E2626 mm (1.024 in)(Medium one-inch) Edison Screw (ES)E2727 mm (1.063 in)(Medium) Edison Screw (ES)
Can I use an E27 bulb in an E26 socket?
E26 stands for 26 mm and the E27 for 27 mm in diameter. These two standards are interchangeable, meaning a US E26 will fit in a European E27 base, and E27 will fit in a E26 base. The only difference is the voltage (for light bulbs). … Europe – E27 Edison Screw.
Will a G25 socket fit E26?
Standard G25 shape with E26 medium base, which can be easily fitted to replace regular G25 incandescent or CFL light bulbs.
Is A15 the same as E26?
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.) … A15 bulbs are usually recommended in a close quarters area, maybe on a small lamp or something.
Will a B11 bulb fit B10?
So yes, B10 and B11 (and CA10) bulbs are interchangeable as long as they all have the right fixture size to fit your wall sconces or candelabra base.
Are light bulbs Standard?
Incandescent bulbs used to be the industry standard, but laws now require new energy-efficient standards for basic light bulbs. All standard 100-, 75-, 60- and 40-watt incandescent bulbs have been phased out and will no longer be produced.
Is A19 a standard light bulb?
It’s standard light bulb shape is so ubiquitous that this is likely the first form factor you think of when someone says “light bulb”. A19 bulbs typically come in outputs ranging from 20 watts up to 100 Watts in their incandescent forms.
What are the different types of light bulb fittings?
NameProduct CodeDiameterCandelabra Edison Screw (CES)E1212mmSmall Edison Screw (SES)E1414mmEdison Screw (ES)E2727mmGiant Edison Screw (GES)E4040mm
How many watts is an E26 bulb?
100 Watts – E26 – LED Light Bulbs – Light Bulbs – The Home Depot.
Is E26 a standard socket?
Bulb Sockets E26 is the American standard socket for E26 base bulbs rated for 120V.
Are E12 and E26 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 size is an E26 bulb base?
Thus a E26 has a 26 mm base diameter.
Is E17 a standard light bulb?
C9 / E17 / Intermediate Base Bulbs … historically known as the old Christmas light bulb size. Medium / E26 Bulbs (E27 in Europe) … the same size as a standard household bulb.
What is E17 socket?
E17 Intermediate – Edison 17-mm Diameter Like candelabra bulbs with E12 bases, bulbs with E17 bases are used for decorative applications, such as chandeliers, wall sconces, Christmas lights, restaurant pendant lights, ornamental lights, and sign or marquee lights.
What does E17 light bulb mean?
Intermediate Screw Base (E17) Bulbs are sometimes called Intermediate Edison Screw (IES), “E” stands for “Edison” and “17” indicates the diameter in millimeters as measured across the peaks of the thread on the base, e.g., E-17 base bulbs have a diameter of 17 mm.
What is a standard E27 socket?
What is an E27 bulb? The E27 bulb is one of the most common bulb we have in our homes today. It’s also known as the Edison bulb with big screw socket (27 millimeters). E27 refers to the socket, the fastening which you screw into your lighting appliance.
Are all E27 bulbs screw?
Installing LED E27 bulbs is the same as standard E27 bulbs – you just screw them into the fitting. What beam angle do I need?
What size is E27 light bulb?
For example, an E27 is an Edison Screw bulb with a diameter of 27 millimeters.
What does G25 mean on a light bulb?
G60: 60 millimeters = 2-3/8″ diameter. G25/G80: 80 millimeters = 3-9/64″ diameter. G30: 30/8 = 3-3/4″ diameter. Most common base types: E26/E27 medium screw base.
What is the difference between a T9 and a T10 bulb?
The T indicates a tubular design and the number behind it indicates the diameter in 1/8″ increments. So a T9 would be a 1 1/8″ diameter tube and a T10 would be a 1 1/4″ diameter tube. If you are wanting a T10 the bracket that holds it may be too large of a diameter to safely hold the 33890.
How big is a G25 light bulb?
These G25 incandescents are 3.125 inches in diameter and have several base type options.