What is E26/E27

Every light fixture has a specific maximum wattage. To determine if your light bulb is compatible, it is important to select a bulb with a wattage that is equal to or lower than the maximum wattage indicated on your fixture. It is crucial to avoid using a high wattage bulb in a light fixture with a lower wattage capacity.

Yes, the A19 and E26 light bulb bases can be used interchangeably. The only distinction between the two is their size and shape. The standard base type for A19 light bulbs is E26. A19 bulbs are designed with an E26 base and can be inserted into sockets that are compatible with Edison bulbs.

To determine if your bulb is E27, you can check the label on the base. The code used for the bulb base will be similar to the one used for the bulb itself. For instance, an E27 base refers to an Edison screw base that has a measurement of 27mm. The measurement is taken across the bottom of the screw or bayonet base.

A19 is a term used to describe the shape and size of the bulb, while E26 refers to the type and size of the base. The “A” in A19 stands for Arbitrary, which is simply the name given to the familiar bulb shape. The number “19” represents the size of the bulb, specifically 19/8″ or 2 3/8″ across. On the other hand, E26 refers to the base of the bulb, which is the part that is inserted into the light socket.

The lamps that will no longer be allowed to be sold after October 1st, 2021 include self-ballasted compact fluorescent retrofit lamps with caps B22, E27, and others, as well as linear halogen R7s lamps with over 2,700 lumens. Additionally, 12V halogen reflector lamps such as MR11/GU4 and MR16/GU5 will also be discontinued.

E26 lamps are specifically designed for the North American market, where the standard voltage is 120V AC. On the other hand, E27 lamps are intended for use in other markets where the standard voltage is 240V AC.