How Do I Know The Base Type of My LED Lights Bulbs?

Spread the love

Can you imagine how many hours it takes to change LED lights bulbs? Not much as it is an easy process. First: Hold the led bulbs, and Second: spin the ladder. 

However, installing the correct light bulbs to your lighting fixture is also not very difficult. All you need to have is a quick guide and ruler.  

Want to know the light bulb bases, screw-type bases with a thread around them, or a 2-point pin type that connects to the base. After knowing the base type, measure the distance between the two pins or the diameter of the screw base in millimeters.  

Understand the LED Lights Bulbs Bases

Understand the LED Lights Bulbs Bases

You may look surprised, but the most common and used bulbs are Edison based on the creator of the bulb, Thomas Edison. The Bayonet base is used for medium light bulb base sizes. 

One of the fantastic things about the LED bulbs bases is that their codes mean something important. 

LED bulbs can be used for various applications, including lamps, ceiling lights, ceiling lamps, and other places at both office and home. 

You can also find them in living rooms and bedrooms and used with reflector bulbs, floodlights, and spotlights. 

The bases are measured in millimeters. So the E26 bases are measured at 26mm across the diameter of the base of the bulb.

The E12 bases type are called pendant or chandelier lights. They are also used in table lamps, wall sconces, restaurant fixtures, marquees, and festive lights.  

They can provide a low to medium luminous intensity depending on the lumens and wattage and create a festive and cozy atmosphere in the area. 

After screw bases, there are pin bases. These bases are mostly found in fluorescent lights, especially the G1 bi-pin.

Among the pin bases, the GU10 bulb is the leader and the most commonly used base. There are actually 2 small circular knobs with a 10 mm distance between both the knobs. These are plugged in with a twist and lock mechanism, forming a secure connection.   

However, don’t confuse G9 bulbs with GU10, as both are totally different. 

Various Sizes of Light Bulb Bases 

Various Sizes of Light Bulb Bases 

Let’s see the most common and used light bulb base size, there are three main bulb base types.

Starting from Edison screw-type bulb bases, four main sizes are available. 

The E26 is the most common LED bulb base type; however, E12 or E11 c andelabra bulb bases are also fairly used. The mogul E39 and intermediate E17 sizes are more rare. 


Now, there are two main types of bases in twist and lock bases – spotlight and bayonet.

GU10 has a twist and lock spotlight base, standard everywhere.

Sizes of Light Bulb Bases

However, bayonet BA15 bases are not common in the US. 

The Final base and pin base lights come in quite different kinds. The G5 base is most common and used in CFL tube lights. G5.3 bases are used in the spotlight. G4, G9, G12, and G13 are also come in pin base lights. The bulb base sizes are commonly used as LED decorative lighting. 

What Is Standard Base Type?

What Is Standard Base Type?

The most common or standard bulb base that is used all over the US is E26 screw-type base. There are the best you can get, and it is good to have them in stock. 

This is similar to the E27 base, which is commonly sold in Asia and Europe. However, E27 is just a millimeter bigger than the American base.

Both can be used interchangeably as their voltage is universal or the same. 

Do LED Bulbs bases impact performance and voltage? 

Some light bulb base types allow only lin voltage bulbs to be connected, those are called E light bulbs.  

Some bulb bases only allow low voltage bulbs to stay connected, which comes with 12 V, or different voltages( 24V, 36V).  

Interchanging these bases will not work or permanently damage the LED lights bulbs. 

However, the bulb base has nothing to do with luminance, wattage, color temperature, or the voltage of the LED bulbs.

Final Words

While the general incandescent and CFL bulbs are slowly being replaced, the Edison screw-type base LED light bulbs are here to stay for a bright future.

Now you know how to measure and identify the light bulb’s base or the socket. Understand everything before touching the bulb and or replacing it on your own. 

It’s essential to check your socket and the size of the bulbs before replacing them. It is not a tough task, anyone can replace it with just a little bit of knowledge. 

Spread the love