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LED Lighting FAQ (Frequently Asked Questions) — Base Type

What is the difference between E26, E27 and A19?

Posted by Sales Team on

Shoppers of LED Light bulbs often confuse the specifications for base type (E26 or E27) and bulb shape (A19).  Base Type Screw in bulbs use a base called an Edison Screw or ES base. This base was developed by Thomas Edison for the first light bulbs and is still in use today. There are four commonly used thread size groups for lamps: Candelabra: E12 North America, E11 in Europe Intermediate: E17 North America, E14 (Small ES, SES) in Europe Medium or standard: E26 (MES) in North America, E27 (ES) in Europe Mogul: E39 North America, E40 (Goliath ES) in Europe....

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