When considering different types of light bulb socket bases, it can get quite confusing. Many people get confused about the different numbers used for each light bulb base and their meanings.
The standard light bulb base is E-26. The E-26 light bulb base must use an E-26 socket; you will find an E-26 socket on many table and floor lamps sold in the United States. The E-26 socket is also known as the standard socket. Besides the E-26 lamp holder socket, the other significant U.S. lamp holder socket types are E-12, E-19 and E-39.
E-26 – Standard Light Bulb Base and Socket
The standard UL size of all lamp holder sockets and light bulbs is the E-26 lamp holder socket and light bulb; most people refer to this as a standard light socket and a light bulb or simply E-26. Most table and floor lamps that you purchase will use an E-26 Socket and an E- 26 light bulb. This kind of light bulb is also known as a Medium Edison Screw (MES) light bulb.
An E-26 light bulb or lamp socket uses an E-26 size light bulb base that is 26 mm in diameter and will fit into an E-26 size lamp holder socket. One way to easily know if your light bulb or socket uses an E 26 bulb is you need to measure the bottom of the light bulb or the inner part of the socket.
The photo below shows you how you can measure your socket to see if it will fit an E-26 light bulb base.
A few things to remember about the standard E-26 sockets and light bulbs:
- E-26 does not refer to the shape or the glass part of the light bulb.
- E-26 only refers to the light bulb base size that will screw into the socket.
- Manufacturers will usually print E 26 on the light bulbs.
- An E-26 bulb can also be an incandescent or LED light bulb.
- E-26 also refers to the size of the lamp holder. So if someone says this lamp base has a UL-certified E- 26 lamp holder socket, what they mean is that the lamp base also uses an E-26 light bulb.
Types of E 26 Sockets for Table and Floor Lamps
When we manufacture UL-certified table or floor lamps, we usually use an E 26 lamp holder; the lamp holder we use are either heavy-duty or regular lamp holders. The heavy-duty or regular lamp holder refers to the outer casing of the lamp holder socket itself. Most of the inner parts used to manufacture heavy-duty or regular sockets on a lamp base are the same.
Here is a chart we have done to compare to you the difference between the E-26 heavy duty and regular lamp holder sockets.
|Description||Heavy Duty Lamp Holder Socket (E-26)||Regular Lamp Holder Socket (E-26)|
|Light Bulb Size||E-26||E-26|
|Socket Light Bulb Opening Size||26 mm or 1 inch||26 mm or 1 inch|
|Socket Kinds||Key or Keyless||Key or Keyless|
|Standard Socket Types||2-way, 3-way, and Dimmer||2-way, 3-way, and Dimmer|
|Lamp Holder Material||Metal||Metal, Ceramic and Plastic.|
|Standard Finishes||Polished Brass and Polished Nickel||Brass and Nickel, White (Ceramic) and Black (Plastic).|
|Other Finishes||Antique Brass, Polished Copper, Satin Nickel, Satin Black||Antique Brass, Polished Copper, Satin Nickel, Satin Black|
|Assembly||Lamp Holder Socket Screws Together||Lamp Holder Socket Clips Together|
|Turn Knob (Key)||Usually always metal||Usually Black Plastic (sometimes the black knob is switched to a metal knob).|
|Standard Use||Table, Floor Lamps and Pendants||Table, Floor Lamps and Pendants|
|UL Parts||Standards Parts (most companies request a heavy-duty harp holder with a heavy-duty socket).||Standard Parts|
|Cost||More expensive than the regular socket, usually found on higher-end lamps and lighting,||Cheaper than the heavy-duty socket.|
As you can see from the above table, the heavy-duty and regular sockets’ main difference is the quality of the lamp holder’s outer casing, on/off turn knob, and how the socket itself assembles.
There is no hard-fast rule about which kind of company will use the heavy-duty socket, and which uses the regular socket for their lamp production. The heavy-duty socket is a more expensive and a higher-end socket than the regular socket; we have found that most higher-end lamp brands will use the heavy-duty socket for their lamp production and not the regular socket.
If you would like to understand more about these two different kinds of E-26 lamp holder sockets, you can watch our video below that clearly shows the difference between the E-26 heavy-duty and E-26 regular UL lamp holder socket.
Please click on the video below:
The E-26 lamp holder socket and light bulb in the standard light bulb used in most lighting. The other significant sockets and light bulb bases are E-12, E-19, and E-39.
What Do The Different E Sockets Mean?
Below we have drawn out the significant UL-certified E light bulb bases and their sizes. The E-12 uses the smallest size light bulb base, while the E-39 uses the largest. The standard light bulb base of the E-26 size is in the middle of these sizes.
Each of these four basic E lamp holder sockets will fit a different type of light bulb base. The 4 types are E-12, E-19, E-26 (standard light bulb base), and E-39, the major UL-certified light bulbs and lamp holder sockets sold in the United States. The European E-26 is called E-27 and must use an E-27 bulb.
The “E” on each of these light bulbs or sockets stands for Edison after the American inventor Thomas Edison. Thomas Edison is considered one of the greatest inventors of all time as he developed key inventions in electrical power, mass communications, sound recordings, and motion pictures. Thomas Edison’s major inventions included the phonograph, the motion picture camera, and the light bulb.
The “E” for the light bulb bases is also known as the ES for the Edison Screw system; the ES system is used today with many light bulb attachment systems. The Edison Screw (ES) refers to the way the light bulbs will be screwed into the lamp holder socket. The light bulbs have a right-hand threaded metal base (caps) that will screw into a matching threaded lamp base socket.
The number after the E on the sockets or light bulbs refers to the diameter in millimeters (mm) of the base of the light bulbs that screws into the lamp holder socket.
The below table we have organized shows each of these E sockets types, their standard industry names, corresponding light bulb types, and the actual light bulb base dimensions that are sold in the United States:
|Socket Holder Size||Lamp Holder Socket Name||Light Bulb Type||Light Bulb Base Dimension|
|E-12||Candelabra Socket||E-12||12 mm (0.47 inch)|
|E-19||Intermediate Socket||E-19||19 mm (0.74 inch)|
|E-26||Medium or Standard socket||E-26||26 mm (1 inch)|
|E-39||Mogul socket||E-39||39 mm (1.53 inch)|
The two major lamp holder sockets that we use for manufacturing UL certified lamps and lighting for home decor and home furnishing is the E-12 (candelabra) and E 26 (medium or standard socket).
Mondoro has its own UL-certified lamp factory outside Hanoi, Vietnam. In the factory, we assembly UL lamps (table, floor, and other portables), we also make some of our own shades. If you are interested in finding out more about how we can help you manufacture some UL certified lamps, please contact Anita by clicking here or write her directly at her email by clicking here. We would love to hear from you and hear how we can help you.
What is Solid Wood vs. Engineered Wood?
Solid wood is cut down from the tree, cut into wood boards, and then used for manufacturing. On the other hand, engineered wood is considered man-made as it is usually manufactured with wood chips or wood shavings and an adhesive. Today the manufacturing of engineered wood is extremely technical.
What is Alabaster?
Alabaster is known as medium-hard gypsum or calcite mineral that is usually white and translucent and has a fine uniformed grain. When Alabaster is put up to the light you can see the small fine natural grain of the stone. As Alabaster is a porous mineral it can be dyed in a variety of colors.
You can discover more about Alabaster by reading our blog What is Alabaster? Alabaster for Home Decor Product Development by clicking here.