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All about Edison Screw Base Light Bulb
It is important to determine if the base type you intend to purchase matches the type taken by your light fixture, otherwise; the bulb will not fit. Then, aside of the light bulbs coming in a variety of base styles and bulb shapes, there are many different bulbs that are the same shape and even have similar looking bases, but those bases might be different sizes. For that, you need to know the technical name or other details for bulb bases.
Light bulb bases nowadays come in several different types, and among that, Edison screw base is the most common one used in the lighting industry. So, this post covers anything about screw base bulbs, helping you understand their naming convention, base styles, bulb shapes and help you with bulb identification.
CONTENTS：
What are Edison Screw Base?
Common Screw Base Styles of Light Bulbs
What Types of Edison Screw Base Bulbs Do LOHAS LED Offer?
What are Edison Screw Base?
Reference: Edison Screw from Wikipedia
Being developed by Thomas Edison, patented in 1890, the screw base is a standard light bulb socket for electric light bulbs that are widely used North America and Europe. Each base type has a descriptive term, such as medium, intermediate, candelabra, etc., and they’re defined by the letter E (Edison) followed by numbers. The numbers refer to base width in millimeters. To take an e26 base for instance, it belongs to an Edison screw base which has a 26 millimeters of diameter.
Being developed by Thomas Edison, patented in 1890, the screw base is a standard light bulb socket for electric light bulbs that are widely used North America and Europe. Each base type has a descriptive term, such as medium, intermediate, candelabra, etc., and they’re defined by the letter E (Edison) followed by numbers. The numbers refer to base width in millimeters. To take an e26 base for instance, it belongs to an Edison screw base which has a 26 millimeters of diameter.
Common Screw Base Styles of Light Bulbs
Screw bases come in several sizes, and they are referred to by both a descriptive name and size. As what we mentioned above, unlike the light bulb shapes, in the designation "Exx", "E" stands for "Edison" and "xx" indicates the diameter in millimeters as measured across the peaks of the thread on the base (male), e.g., e12 base has a diameter of 12 mm. To these days, four commonly used thread size groups for mains supply lamps in U.S. are - Candelabra base/E12 base, Intermediate base/E17 base, Medium or standard base/E26 base, Mogul base/E39 base.
E26 Bulb - Medium Bulb
E26 light bulbs are the most popular of all screw base bulbs that are primarily used in North America. Then, e26 bulbs are commonly used for general lighting in standard light fixtures, such as ceiling lights, lamps, can lights, outdoor spotlight and flood light fixtures, and vanity lights. Not only that, bulbs with these base types are available in many different bulb shapes, lumen, wattage and functions, but the a19 bulb and a15 bulb are the most common one that come with an e26 base.
 e26 smart bulb |
 e26 dusk to dawn light bulb |
 e26 yellow led bulb |
 e26 smart retrofit downlight |
 e26 led daylight bulb |
|
|---|---|---|---|---|---|
| Price | $21.99/2 Pack | $25.99/4 Pack | $19.99/4 Pack | $25.99/Pack | $29.99/4 Pack |
| Lumen | 450LM | 500LM | 450LM | 680LM | 2500LM |
| Watt (Replacement Watt) |
8W (60W Equivalent) |
6W (40W Equivalent) |
5W (40W Equivalent) |
10W (65W Equivalent) |
23W (150 - 200W Equivalent) |
| Light Color | RGB & Cool White |
Daylight White | Orange Yellow | RGB & Tunable White |
Daylight White |
| Color Temperature | 2700K-6000K | 5000K | 2000K | 2000K-9000K | 50000K |
| Shape | A19 Bulb | A19 Bulb | A15 Bulb | Round | Candle |
| Key Functions | Controlled by Voice and APP | Auto Turn ON or OFF | Provide sufficient illumination without attracting bugs | Decoration Controlled by Voice and APP |
Light comes on instantly when turned on |
| Dimmable | √ | × | × | √ | × |
E12 Bulb - Candelabra Bulb
Having a diameter of 12 mm, e12 light bulbs are considered smaller. So, if you have a light fixture with a smaller base than a traditional e26 bulb base, you should take an e12 bulb / candelabra bulb for instead, which is characterized by their relatively candelabra base and tear-drop glass shapes. Plus, candelabra bulbs are generally used for night light bulbs but can also be found in some decorative bulbs used over the in a chandelier.
 e12 smart bulb |
 e12 color changing light bulb |
 e12 filament vintage light bulb |
 e12 filament vintage light bulb |
 e12 decorative cylindrical bulb |
|
|---|---|---|---|---|---|
| Price | $26.99/2 Pack | $29.99/2 Pack | $22.99/6 Pack | $29.99/6 Pack | $18.99/3 Pack |
| Lumen | 450LM | 810LM | 400LM | 600LM | 1100LM |
| Watt (Replacement Watt) |
5W (40W Equivalent) |
9W (60W Equivalent) |
4W (40W Equivalent) |
6W (60W Equivalent) |
12W (100W Equivalent) |
| Light Color | RGB & Cool White |
RGB & Tunable White |
Warm White | Warm White | Warm White |
| Color Temperature | 2700K-6000K | 2700K-9000K | 2700K | 2700K | 2700K |
| Shape | Candle | A19 Bulb | ST48 Beam angle: 330° |
Candle | Candle |
| Key Functions | Controlled by Voice and APP | Controlled by Voice and APP | Decoration | Decoration | Decoration |
| Dimmable | √ | √ | √ | × | × |
What Types of Edison Screw Base Bulbs Do LOHAS LED Offer?
Up to now, apart from the the common standard led bulbs, screw base bulbs are generally designed to the e26 bulb or e12 bulb but with different functions. So, it's quite important for you to consider what extra you want your bulbs add before the purchase.
Dusk to Dawn Light
If you do wanna never have to worry about keep leaving the light on during the daytime, the bulb come with built-in dusk to dawn photocell sensor is all you need. With its built-in photocell sensor, the dusk to dawn light bulb will automatically turn the lights on at dusk, and turn itself offwhen light is detected by this sensor.
NOTE: If you are using more than one dusk to dawn lighting, remember to give them a suitable distance - more than 3.3 FT, so they can work perfect without being affecting by each other.
 a19 e26 dusk to dawn light bulb |
 a19 e26 dusk to dawn light bulb |
 a19 e26 dusk to dawn light bulb |
 a21 e26 dusk to dawn light bulb |
 br30 e26 dusk to dawn light bulb |
|
|---|---|---|---|---|---|
| Package | 4 Pack | 4 Pack | 2 Pack | 2 Pack | 2 Pack |
| Lumen | 500LM | 500LM | 920LM | 1580LM | 720LM |
| Watt | 6W (40W Equivalent) |
6W (40W Equivalent) |
12W (100W Equivalent) |
16W (150W Equivalent) |
9W (60W Equivalent) |
| Bulb Size | e26 base a19 bulb |
e26 base a19 bulb |
e26 base a19 bulb |
e26 base a19 bulb |
e26 base a19 bulb |
| Color Temperature | Daylight White 5000K | Soft White 3000K |
Daylight White 5000K | Daylight White 5000K | Daylight White 5000K |
Smart Bulbs
In addition to providing convenience, smart wifi light can be somewhat fun but also the easiest way for them to make their home "smart", so many lighting manufactures has designed the screw base bulbs to smart light bulbs. Then, from making our life colorful and full of energy to liven up the party, the trend of color changing light bulb becomes more and more popular.
 E12 Color Changing Light Bulb |
 A19 Color Changing Light Bulb |
 Color Changing Downlight |
 BR30 Color Changing Light Bulb |
 E26 Color Changing Light Bulb |
|
|---|---|---|---|---|---|
| Price | $26.99/2 Pack | $21.99/2 Pack | $25.99/Pack | $17.99/Pack | $36.99/4 Pack |
| Lumen | 450LM | 650LM | 680LM | 1000LM | 810LM |
| Watt (Replacement Watt) |
5W (40W Equivalent) |
8W (60W Equivalent) |
10W (65W Equivalent) |
10W (75W Equivalent) |
9W (60W Equivalent) |
| Light Color | RGB & Cool White |
RGB & Warm White |
RGB & Warm White |
RGB & Warm White |
RGB & Warm White |
| Color Temperature | 2700K-6500K | 2700K-9000K | 2000K-9000K | 2000K-9000K | 2700K-6000K |
| Base | candelabra base | e26 base | e26 base | e26 base | e26 base |
| Shape | led candelabra bulbs | a19 bulb | round | br30 | bulb |
| Voice Control | Alexa, Google Assistant, Siri, |
Alexa, Google Assistant, Siri, |
Alexa, Google Assistant, Siri, |
Alexa, Google Assistant, Siri, |
Alexa, Google Assistant, Siri, |
| Dimmable | √ | √ | √ | √ | √ |
| No Hub Design | √ | √ | √ | √ | √ |
Surely, apart from these two types of screw base bulbs we mentioned, most of the screw base bulbs that you buy in stores or online are going to have this function - avoiding attracting any bugs while offering the suitable soft light for anywhere surround your home. What is it? The yellow led bulbs.
Although lighting has significantly changed and improved since Edison made his public demonstration of his incandescent light bulb in 1879, the entire industry still recognizes his contributions every day when they refer to the Edison base type. Hope this guide have done some help for you.