Look on the butts!

Look on the butts!

led light

The base is the metal part of the lamp that allows it to be fixed in a luminaire. There are so many different tips that it is important to know how to differentiate them and to know their usefulness.

Here is a small reminder of most of those existing:

Screw caps

The E27, the standard size
Let's start with the most common which is the E27 screw cap. It is the most used every day in our homes. The E27 is 27mm in diameter and is the standard size compatible with most fixtures.

The E14, the smallest

The smaller E14 is 14mm in diameter and is appreciated for its elegance and subtle appearance.

Bayonet caps

In our Anglo-Saxon friends, like screw caps in our home, the bayonet caps with pins on the side are the most used. A  B22 is a base of 22 mm in diameter.

GU for spots

The GU is for spotlights and ceiling décor and some equipment. The GU10 cap is the most important in its size. Indeed, its two pins are separated by 10 mm. The GU5.3 and GU4 are smaller and are therefore used for small lighting elements. The GU5.3 base has a 5.3 mm leg spacing and the GU4 base is 4 mm

Pots for accent lighting or precision lighting
Pin caps are often used for precision lighting or accent lighting. The G53 is indeed often intended for professional lighting for the enhancement of objects or scenes. The two pins of the G53 base are separated by 53 mm. As for chip G4 and G9, they are used for precision lighting. The G4 is characterized by a gap between the tabs of 4 mm against 9 mm for the gap between the pins of the G9.

The caps for the tubes

The R7

The R7 base is the one used for the tubes used for living room lamps, the so-called "halogen lamps".

The G5, G13, and 2GX13

As for the G5, G13, and 2GX13 caps, they are intended for TL tubes. The G5, whose spindle spacing is 5 mm, is used for the T5 tube. T8 tubes require G13 caps, with a pin gap not of 13 mm as indicated in its name but of 25 mm. Finally, the 2GX13 is used for circular tubes.


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