There are some little things that usually no one pays attention to and does not give them much importance. This category includes light bulb bases, the differences which are noticed only when the bulb is not included in the socket, because they must be the same type for a successful fixation. Plinths are usually made of ceramic or metal, sometimes combining both materials to increase the effectiveness of the plinth.
Contents
How the marking is made
The marking is a combination of a letter or several letters on the front and a number at the end.
The type is determined by the letter in front:
- E - Threaded-type plinth (sometimes also called an Edison screw);
- G - Pin-type plinth;
- R - Plinth that has recessed contacts;
- B - Pin-type plinth;
- S - Soffit type plinth;
- P - Plinth of focusing type;
- T - Base of telephone type;
- K - Cable base;
- W - Base-less lamp.
Also after these letters, information may be given about the subtype of lamp that is used:
- U - Bulb that operates in energy-saving mode;
- V - Base that has a tapered end;
- A - Automotive lamp.
The letters are followed by numbers that indicate (in mm) the diameter of the base or the distance between its contacts. If after you see another letter, it is the number of contacts (s means 1, d means 2, t means 3, q means 4, p means 5).
Features and application of some types of lamp bases
Screw base E
The marking of this group is quite simple. It includes the letter "E" and the designation of the body diameter. For better compatibility, you can often find special adapters that make the work much easier. The most popular among the bases of this type are Е10, Е14, Е27, Е40. This subtype is used for both incandescent, energy-saving and LED lamps. The most popular is the classic Е27 и Е14. The largest type is used for lighting large areas - streets, parks, industrial buildings.
G pin base
Designs of this type use pins, and there are no threads. They are used in small halogen bulbs, as well as built-in and spotlights. The most common are G4 (the most compact, designed for spot lighting of interiors), G5.3 (most common in ceiling luminaires), G9 (used in decorative lighting under 220V), G10 (sometimes found in wall lights) G13 и G23 (used in standard fluorescent lamps (These lamps are not suitable for indoor lighting, but have a larger illuminated area than incandescent lamps).
Recessed pin base R
This is a type of socket, designed for high wattages and temperatures, suitable for halogen, tubular and quartz lamps. They are also marked with a number that indicates the length of the tube in mm.
B-Pin Base
This group is also notable for its asymmetric edges, which are installed in the socket in a strictly defined position, an example of focusing the light in a particular position, which is needed in car bulbs. This option is more compact than the standard Edison screw and features an expedited process for replacing a failed bulb.
Soffit S base
This is a type of double-sided base designs designed to illuminate bathrooms or illuminate various objects (showcases, license plates, mirrors). Often used in stage equipment. Distinguished by the characteristic arrangement of the contacts on both sides. Labeled Sxwhere x stands for the diameter of the housing. It can be fixed on both sides as well as on one side.
Focusing plinth P
This plinth variation is made using a prefabricated lens to direct the flow of light. They are used for navigation lights, movie projectors or spotlights. The marking indicates the diameter of the flange that focuses the light, or an arbitrary part of the body.
T telephone plinth.
It is a seldom seen design as a rule carry out small illumination of the equipment, on a computer keyboard or in control panels. The leads are mounted on an external base, the width of which is indicated by marking numbers.
K-cable base
Infrequent variety, which is often used in projection equipment.
Pin-less type W.
The most elementary subspecies, where the wire contacts are led out through a glass bulb, the thickness of which with one current lead is indicated in the marking. Further they put the multiplier sign of the base width in millimeters. Their examples can be found in garlands and as direction indicators.
Characteristics of popular light bulb bases
E14 base
Everyone's favorite popular "minion". Fits many types bulbs, used for both decorative and conventional lighting. It is most often consumed under incandescent bulbs, as the energy-saving version is more expensive. Also, do not forget about led varieties, which do not have the disadvantages inherent in the lamps mentioned above. Because of its compactness "minionsMinions" are widely used, because they can be inserted into almost any lamp or chandelier.
E27 socket
The same properties as the above mentioned E14, differing from it only by an older history of origin and greater fame. As for versatility, both designs are almost the same, because in case of need there is a countless number of special adapters.
G4 base
Designed for voltages from 12 to 24 V, with an approximate life of up to two thousand hours. Suitable for very small halogen-type bulbs, which perform only a decorative role in lighting.
G5 base
Unlike its smaller subtype, also designed for LED lamps. They are often used in suspended ceilings for local lighting of individual elements of the interior decor of the room.
G9 cap.
Distinguished by their work without transformers, used in normal 220V. Installed in many lamps and chandeliers, the lamps are usually halogen (then the base part is made of glass), but there are also LED variations (in this case the glass is replaced by plastic). Ranked second in popularity after the Edison screw.
2G10 base
This is a combination of two similar designs. It has four pins and is made specifically for especially flat fluorescent-type lamps, which are used for characteristic wall lights, or their ceiling versions.
2G11 base
Even more compact version, designed for fluorescent lampsThat is inserted into luminaires of especially small dimensions, which illuminate a small territory, but are used both for indoor and outdoor illumination of the enclosed area.
G12 socket
Designed for metal halide small bulbs that have excellent color rendering and light output, so they are widely used in landscape design, often to illuminate facades, monuments or fountains. Relatively durable. Stable work in outdoor conditions and generally unpretentious. Quite a popular subgroup.
G13 socket
Applicable for the installation of standard T8 fluorescent lamps, with a bulb diameter up to 26 mm. Their gas discharge subspecies is more economical with a comparatively large illuminated area and is clearly more durable than similar incandescent lamps. Typically used for indoor applications.
R50 base
The most popular application for this group is in spotlights (a type of spotlight) or suspended ceilings. Mirror lamps are gaining popularity in home lighting because of their low cost. The bulb type is often drop-shaped.
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