Can I Use an E27 Bulb in an E26 Socket

To use a Dual Voltage Electric LED Bulb E26 in a E27 or B22 environment?

So I bought a Universal LED Bulb that emulates Circadian Rhythm for lighting to aid manage my sleep cycles, locally (wherever I am) likewise as when traveling.

Most of my time is spent between:

• United states of america (Currently ordered & Shipped E26) &
• India (mostly B22 around and newer installations have E27)
• Some other nations now & then (not long enough to lodge there)
• I have a local Bharat store bought (Similar to picture below) B22 to E26/E27 converter I've used before)
  • Wont work with new E26 bulb; appeared it would, but did so for E27.
  • On checking, previous china made bulb model was E27 bought via Amazon The states

When I googled why, this was the answer that popped upwardly -

Tin A Seedling With An E26 Base of operations Fit In An E27 Socket?
The answer is sometimes. Sometimes an E26 base will fit into an E27 socket, while other times an E26 base will take one extra tread, preventing it from reaching the bottom of the socket and forming a connexion.

Question: How practise I make it work in Republic of india or any E27 / B22 locations ?

• Find a converter that does B22 to E26 and a E27 to E26 too (Hard find?)
• Small DIY hack on converter that manipulates / fixes around this E26/E27 difference?

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Updated Information: "Standard" seedling base: E26 or E27? Both? https://www.homeownershub.com/maintenance/standard-bulb-base of operations-e26-or-e27-both-266061-.htm

Sarah wrote:

• E26 (U.s.a.) are one millimeter shorter and may not make contact with the base of operations. No contact, no light.
• Longer, E27 bulbs will make contact in the shorter base. I take had the same experience.
• All my USA purchased lamps worked great in Europe.
• None of my European lamps or ceiling lights worked in the U.s. without bulb base of operations adaptors.
• It has been so long since I purchased them I tin can't tell you where to become.

The deviation of the lamp socket E26 and E27
http://www.lampholder.internet/support/lamp-socket-E26-and-E27.html

• The threads are the same but I believe E27 is a longer base, pregnant a European seedling would fit an American socket simply the reverse might not exist true.

• I seem to recall a High german client of one of my former employers who brought several lamps over from Germany, and had no trouble getting American bulbs to fit.

• They are the same diameter and thread size. The only difference is that the E26 is 26mm long and the E27 is 27.5mm long.

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https://en.wikipedia.org/wiki/Edison_screw

E26 or E27 Edison Screw?

There is only a 1mm difference betwixt the threads of E26 and E27, then they are almost identical. Yet, it's of import to buy the right bulb certified for employ in your country. This is considering each country and region of the globe, have different certifications. B22 bulbs are besides available. They are not as popular, and generally used in the UK, Australia, and India.

An like shooting fish in a barrel reference of what Bulb type is used in major markets is as follows:

United States - E26 Edison Screw
Canada - E26 Edison Screw
Japan, Korea & Taiwan - E26 Edison Screw
Australia - E27 Edison Screw (or B22 Bayonet Cap)
Europe - E27 Edison Screw
United Kingdom - E27 Edison Screw (or B22 Bayonet Cap)

• For legal, and toll based reasons, the just bulbs we sell/ship to the United States are E26 connector bulbs.
• E27 bulbs are only available to ship to countries where they are certified. We practise not ship, nether whatever circumstances, E27 bulbs to the United States.

"Bulbs have a universal power supply. They will work with electrical grid power from 100-240V 50/60Hz"

"The following countries employ E27 bulbs:
..India.. "

pospisilpanduch.blogspot.com

Source: https://electronics.stackexchange.com/questions/381770/to-use-a-dual-voltage-electric-led-bulb-e26-in-a-e27-environment-socket