What Size Base Is A Standard Light Bulb

Past the end, y'all'll meet how much use a calorie-free bulb socket types nautical chart can exist to decide your bulb holder sizes.

Thomas Edison invented the Edison spiral fitting, a screw mount mechanism for lite bulbs, in 1909. Although bayonet sockets and a variety of bulb shapes are available, they all perform identical functions.

Edison spiral lamp bases and fittings are now produced to international standards and used for general and specialty lamps. A threaded metal base screws into a matched socket to hold the bulb. (Read Socket Sizes Chart)

Bulbs are now widely used in various applications, including Christmas lights, outdoor string decorative lights, night lamps, indicator lights, and many other typical applications.

Even so, information technology is the screw bases that vary in size and thread, not the bulb shapes, whether pear-shaped or spherical globe-shaped.

Our guide volition teach y'all everything yous need to know about the standard light bulb socket size for your pendant lights or general lighting in your home. Past the stop, you lot'll empathise how valuable a low-cal bulb socket types chart is for determining bulb holder sizes.

Are E26 and E27 the Same?

The minimum distances between the lesser live contact and the spiral threads alter between E26 and E27. The reason is that the E26 and E27 are designed for differing line voltage levels – 120V AC and 240V Air-conditioning.

The diameter of the E26 is 26 mm, while the E27 is 27 mm. Therefore, an E26 bulb can exist used in an E27 base, and an E27 seedling may be used in an E26 base without difficulty.

E26 and E27 lamp bases have the exact diameter specifications built to the widely canonical IEC light seedling socket standards of 26.05 mm to 26.45 mm.

You volition usually ever find that E26 and E27 lamp bases are mechanically interchangeable, pregnant that an E26 bulb volition fit into an E27 socket and vice versa. However, every bit a bulb fits and works doesn't hateful your lamp complies with electrical safety standards.

How Do I Know What Size Light Bulb Socket I Have?

In that location are many light bulb base of operations sizes bachelor.

C7 / E12 / Candelabra Base of operations socket size Bulbs: Used on chandelier-type fixtures or decorative lighting.
C9 / E17 / Intermediate Base Bulbs: Commonly known every bit the erstwhile Christmas low-cal bulb size.
Medium / E26 Bulbs (E27 in Europe): Your standard household bulb size.

The following provides the dimensions of a bulb socket which is helpful if y'all're trying to match the socket size of a bulb you already take.

For more than explanation of the light bulb base sizes, you can check letter-number references (E12, E17, and E26) to help with the bulbs base style and size.

The start letter designates the shape or form of the base, and the number represents the width of the base (ordinarily in millimeters). For example, the 11S14 bulb has an E26 base, and the "Due east" refers to an Edison screw-in, and the 26 is the 26 mm base width.

Light Bulb Shapes are like identifying the base size, and light bulbs utilize a letter of the alphabet-number reference for the shape and size of a lite bulb. (Find the Best Battery Operated Lights)

Letters refer to shape, and numbers refer to sizes.

A (Arbitrary): Resembles the standard household bulb.
C (Conic): Typically referred to equally a traditional Christmas tree seedling.
One thousand (Globe): Round or round.
South (Sign): Straight-sided and traditionally used in signs.
ST (Direct Tapered): Most ofttimes seen in vintage, Edison-style bulbs.
T (Tubular): Tall narrow tube-shape and also used in vintage, Edison-mode bulbs.

What Are the Different Low-cal Bulb Socket Sizes?

The Exx number refers to the diameter in millimeters, even inside the USA, where eighths of an inch measure bulb glass. You lot can find four sizes of screw-in sockets used for line-voltage lamps:

Candelabrum: E12 (bore of 12 mm): E12 is the smaller "miniature Edison screw mes" base used for nightlight bulbs and decorative light bulbs used in chandeliers and bathroom mirrors.
Intermediate: E17 (diameter of 17 mm): E17 (intermediate Edison screw ies) sits between 2 sizes. It'south often used in desk lamps and appliance bulbs, although not very common.
Medium or Standard: E26 (bore of 26 mm): E26 is the size of most light bulbs in the The states.
Mogul: E39 (bore of 39 mm): The large E39 "mogul" base is used for street lights and loftier-wattage lamps.

Edison Light Socket Sizes Chart

Here is the light bulb base size chart for Edison low-cal fixture sockets.

Size	Proper noun	Base major diameter (thread external)	Usage Scenario	Notes
E5	Lilliput Edison Spiral (LES)	5 mm	Decorative, Indicators	Another name is "Midget"
E10	Miniature Edison Screw (MES)	10 mm	Bicycle Lights, Flashlights	Too called "Miniature Spiral"
E11	Mini-Candelabra Edison Screw (mini-tin)	11 mm	120v Halogen Mini Candelabra
E12	Candelabra Edison Screw (CES)	12 mm	120v Candelabrum, Night Lamp	Information technology can be called "Candelabra", C7 Common US Socket
E14	Pocket-size Edison Spiral (SES)	14 mm	230v Candelabrum, Chandelier, Night Lamp, Pendant Calorie-free
E17	Intermediate Edison Screw (IES)	17 mm	120v Appliances	Some other name is "Intermediate", C9
E26	Edison Screw (ES or MES)	26 mm	Standard 120v Lights	AKA "Medium", About Common US Socket
E27	Edison Spiral (ES)	27 mm	Standard 230v Lights	AKA "European Intermediate"
E29	Admedium Edison Screw (ES)	39 mm	Specific Applications such as UV Spotlight Lamps
E39	Sing-contact Goliath Edison Spiral (GES)	twoscore mm	120v 250+ W Industrial	Known every bit "Mogul", Common US Socket
E40	Goliath Edison Screw (GES)		230v 250+ W Industrial

Bi-Pin Socket Sizes Bulb Base Chart

Bi-Pin bulbs are often used in tubes rather than the more traditional bulb shape.

Plumbing fixtures Designation	Pivot Spacing	Pin Diameter	Common Usage
G4/GY4	4mm	65 - .75mm	five-20w Small Halogen Quartz Capsules
GU4/GZ4	4mm	.95 - 1.05mm	MR8 And MR11
G5	5mm	N/A	T4 Or T5 Fluorescent Bulbs
G5.3	5.33mm	1.47 - ane.65mm
GU5.three/GX5.3	five.33mm	1.45 - 1.60mm	20-50w Small Halogen, (Like MR16)
GY5.3	v.33mm	flat pins
G6.35/GX6.35/GZ6.35	6.35mm	0.95 - 1.05mm
GY6.35	6.35mm	1.2 - 1.3mm	Halogen Used In Mural Lighting
G8	8mm	North/A	35-100w Halogen
GY8.6	8.6mm	N/A	100w Or Below Element of group vii
G9	9mm	N/A	120v Or 230v Halogen And LED Lamps
G9.5	9.5mm	3.x - 3.25mm	Theater Utilise
GU10	10mm	N/A	35-50w MR16 Halogen; Compact Fluorescent And LED Lamps
GZ10	10mm	Due north/A	Adds Dichroic Filter To GU10; May Employ GU10 Bulbs
G12	12mm	2.35mm	Unmarried-Finish Metal Halide Lamps
G13	13mm	2.35mm	T8/10/12 Fluorescent Tubes
GX16d	16mm	N/A	Theatrical PAR Lamps
G23	23mm	2mm	Fluorescent PL Lamps In Recessed Fixtures
GU24	24mm	Northward/A	Twist-Lock (Self-Ballasted Compact Fluorescent)
G38	38mm	11.1mm	High-Powered Theatrical Lamps
GX53	53mm	Due north/A	Twist-Lock (Nether-Cabinet Compact Fluorescent; Or LED)
GX70	70mm	Northward/A	Twist-Lock (Puck-Shaped Compact Fluorescent And LED)

What Size is A Standard Light Seedling Plumbing equipment?

The spiral medium E26 has the most mutual medium base socket dimensions of any bulb base in the Us. Most incandescent, nostalgic LED, CFL, and halogen lite bulbs contain information technology. The Candelabra E12 base, which is used for smaller ornamental incandescent/nostalgic bulbs, is the second most mutual bulb base of operations.

LED bulbs are changing bulb choice; however, they still use the same medium base socket size, although the bulb functions differently.

When picking an LED bulb, information technology'southward essential to consider the light output. It's measured in lumens (light output) when everything used to be measured in wattage in the early days.

To supplant existing incandescent bulbs, screw base of operations bulbs with the recognizable Edison screw socket are used. Replace your sometime incandescent bulb with your new CFL to save coin on energy.

Pin-base CFLs feature two or iv pins on their compact plastic bases and are used with dissever ballasts in fixtures designed for pivot-base CFLs.

The GU24 socket and base of operations system should supplant the Edison spiral ES standard socket and base in free energy-efficient lighting fixtures in lodge to comply with the most contempo Energy STAR criteria. GU24 bulbs are used in fixtures that avert backward compatibility with screw base bulbs, resulting in improved energy efficiency.

Bulb Type	Application	IEC 60061-i Standard Sheet
E5	Indicator Lights, Decorative Lights	7004-25[xi] (lilliput Edison screw les)
E10	Flashlights, Bicycle Lights	7004-22
E11	120 5 Halogen Mini-Candelabra	(7004-6-ane)
E12	120 V Mini Candelabra Edison screw/Night Lamp	7004-28
E14	230 Five Candelabra/Chandelier, Night Lamps, And Some Pendant Lights.	7004-23 (candelabrum Edison screw ces)
E17	120 V Appliance / Outdoor Christmas	7004-26
E26	Standard 120 V Lamps	7004-21A-ii
E27	Standard 230 V Lamps	7004-21
E39	120 V 250+ W Industrial	7004-24-A1
E40	230 V 250+ W Industrial	7004-24

You can find many spiral bases and it tin can appear daunting, to begin with. However, when shopping for bulbs, it is much more than straightforward than checking if you have a Minor Edison screw SES or an Edison spiral ES standard bulb. (Find the Best Rechargeable LED Flashlight)

The type of fixture dictates the base types past the size. In the The states, the base type tin vary in size, and it isn't besides challenging to find the right bulb for your candelabra night lamp or if you thread external lights around your garden.