Bulbs with these bases can be used interchangeably as there is only a 1 millimeter difference in base size.
What does mogul base bulb mean.
You can most instantly recognize an e26 bulb by looking at the bottom or non light emitting side of the bulb.
Find the light bulb base type you re looking for with this visual chart detailed illustrations of general bases fluorescent bases and specialty halogen base types.
Not all e26 bulbs will be of a21.
And anything above 300 watts typically has a mogul base.
This base was developed by thomas edison for the first light bulbs and is still in use today.
Screw in bulbs use a base called an edison screw or es base.
A21 bulbs always use e26 but not vice versa according to ansi standards a21 bulbs must always use an e26 base for mounting into a light fixture.
A21 and e26 refer to different things but in this case you will find that all a21 bulbs use e26 lamp bases.
A type describes a bulb that has a pear like shape.
Mogul bases are always assumed in the part number.
The number that follows the a within the a series indicates the width of the bulb in one eighth inch units or in millimeters.
An e26 bulb therefore is any bulb or lamp that utilizes the e26 cap or base for mounting and electrical contact.
E39 bulbs are primarily used in north america while e40 bulbs are popular in europe.
A mogul lamp or six way lamp is a floor lamp which has a large center light bulb surrounded by three or four smaller bulbs that may be candelabra style or standard medium base bulbs each mounted base down this entire setting is typically covered at least partially by a large cylindrical or bell shaped fabric shade which is fitted over the reflector bowl an upturned white colored glass.
Be aware however that the opposite does not hold true.
Mogul base bulbs are made of cast porcelain to tolerate higher temperatures making them ideal for industrial and commercial uses e g power ratings of 250 1000 watts.
Some ceramic metal halides also come in a pin base.
Now that we have learned that e26 and e27 are terms used to describe the type of base used what does a19 or bulbs with an a designation mean.
If you see a metallic base with screw threads approximately 1 inch in diameter you most likely have an e26 bulb.
Pick from led light bulbs high intensity discharge hid light bulbs and specialty light bulbs.
Shoppers of led light bulbs often confuse the specifications for base type e26 or e27 and bulb shape a19.
For example most of the time anything below 150 watts has a medium base.
Base types for hid lamps.
