With the similar size lock have, E26 and also E27 bulbs are generally regarded together the same or interchangeable. But as a matter of fact, there room some difference in between them, which space specially designed to fit corresponding lamp sockets at certain voltage levels. To assist you make clear the difference between e26 bulb and e27 bulb, then select the best one to securely fit your lamp holders, us made this post here.
CONTENTS:The Intro come E26 Bulb and also E27 BulbMechanical Differences in between E26 irradiate Bulb and also E27 irradiate BulbElectrical security Differences in between E26 and E27

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one E26 pear is any kind of bulb or lamp through a E26 cap or base. The hatchet E26 describes a light bulb's cap or base which is used for mounting come the light fixture and also getting electrical contact. The letter "E" in E26 describes Edison Screw, the many standard of lamp bases, when the number "26" describes its diameter in millimeter (about 1 inch). Based upon this, E27 bulbs are simply 1mm much longer than E26 bulbs in screw diameter. Many people may assume that E26 and also E27 are the exact same or interchangeable. Indeed, E26 and also E27 space mechanically interchangeable however it does not necessarily meet the electric safety requirements that the lamp and lampholders room designed for. That's because, E26 and E27 standards room designed to totally different voltage levels, which room 120V AC and also 240V AC respectively. That said, E26 bulb bases receive voltage up to 120VAC. Therefore E27 bulbs room safe to usage in E26 lampholders, if E26 bulbs will lead to short circuits and also electrical fires when mounted in E27 lampholders. Actually, E26 & E27 bulbs have other slight differences that are carefully related to your applications.
Since higher voltage requires a broader separation of live and neutral contacts, E27 bulbs have some far-reaching differences from E26 bulbs in screw design, i m sorry are: as whole screw length Insulator cap height Screw diameter at thread peak Live contact pad broad


Length that Screw (MIN)

Insulator cap Height

Screw Diameter at Thread Peak
Live call Pad Width
E26 light Bulb19.56mm3.25mm26.05mm - 26.41mm9.14mm - 11.56mm
E27 irradiate Bulb22.0mm5mm26.05mm - 26.45mm4.8mm-11.5mm

The difference between E26 bulbs and also E27 bulbs mentioned over seem inconsequential, but they are the crucial features to identify which voltage level the bulbs are applicable to, or even if it is the bulbs satisfy the electrical safety criter that the lamps and lampholders are designed for. Normally, E26 lamps room designed for the north American and also other countries which commonly use 120V AC, such as the united States, Canada, Japan, Korea and also Taiwan, when E27 bulbs room widely supplied for europe countries and Australia wherein the voltage is 240V AC. Since E27 bulbs occupational at greater voltage level, they have stricter requirements on the separation street to for sure a wider separation of live and also neutral contacts. As the mechanical differences shown in the 2nd part, you deserve to see that E27 has actually a longer length of screw and more comprehensive thread trough diameter, which makes the screw precisely aligned come the socket and also protects against moisture and also debris indigenous entering the socket. Besides, E27 uses a higher insulator elevation to boost the distance between the live contact and also neutral screw base. Every these distinctions are ethereal but far-reaching enough to reduce the hazard of short circuiting and also electrical fires. In general, though E26 and also E27 bulbs are exceptionally similar, they space not have to interchangeable. Indigenous an electrical safety perspective, you’d far better use E26 bulbs for E26 sockets in ~ 120V AC and also E27 bulbs for E27 sockets in ~ 240V AC. Expect this helps you do clear and get the appropriate bulb in your following purchase. Many thanks for reading!

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