The E27 light bulb has slightly deeper grooves in the thread than On the package of European light bulbs you will normally not find any numberingĭescribing the shape or diameter of the glass.īase and there will be photo showing the shape.įour of the most common light bulbs: US A19 with E26, European E27, US B10 Large reflector light bulb used for spot lights. Typical reflector light bulb for pot lights The C7 bulb has a glass diameter of 7*1/8inch. The C7 refers to the glass diameter of a US small night light bulb. The A15 bulb has a glass diameter of 15*1/8inch. The A15 refers to the glass diameter of a US kitchen appliance or ceiling fan light bulb. The A19 bulb has a glass diameter of 19*1/8inch. The A19 refers to the glass diameter of a US standard light bulb.
The B13 bulb has a glass diameter 13*1/8inch. The B13 refers to the glass diameter of a US candle shape light bulb. The B10 bulb has a glass diameter 10*1/8inch. The B10 refers to the glass diameter of a small US candle shape light bulb. It will normally just say B10 which is actually just specification of the shape On most packages for those light bulbs you will not see any mentioning of E12. Candelabra Edison screw, 12mm base diameter. E12 US small candle shape light bulb base.E14 European small candle shape light bulb.Normally find one of the following "size" designations. On the packaging of bulbs for household lighting you will There are a lot of exotic light bulbs however in practice only The Edison screw (E.) is a standard socket for light bulbs developed by ThomasĮdison.
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