It is difficult to imagine what the modern world would look like without light bulbs. Manufacturers produce a wide variety of fixtures. However, you should know that not all are the same. When buying, it is important to know what size the lamp base is, otherwise the purchased copy may simply not fit, and you will need to purchase another lighting fixture of the appropriate size. Read our article carefully to avoid unnecessary purchases in the future.
Types of caps
The standard lamp base is marked with a letter and numbers. What do they mean? The letter indicates the variety, and the number characterizes the type. The most common base to date, marked with the letter "E", was invented by Edison. It is called the " Edison Screw type". The number following the letter means the diameter. The most common base size today is 27 mm.
In terms of popularity, the “minions” - “E14” - are in the honorable second place. This size lamp base is usually used in sconces and in small fixtures. Although manufacturers willingly use them in large chandeliers.
The base of incandescent lamps of type "E" are also with the original markings 5, 10, 12, 17, 26 and 40 mm in diameter. However, in everyday life, their prevalence is small.
In the modern world, energy-saving technologies are becoming increasingly popular. Manufacturers of lighting devices did not stand aside. Today, there are many different kinds of
energy-saving light bulbs with socles such as "E27", as well as "E14". However, you should be aware that they are not suitable for electronic switches. Also, such lamps are not suitable for working with circuits where conventional dimmers are used.
Pin caps
The difference between this type of socles from the previous one is in the pin system for attaching the lamp to the cartridge. This base is designated by the letter "G". The number that follows indicates the distance between the midpoints of the pins. Such a compound is used in fluorescent as well as in halogen lighting devices. The sizes of lamp caps of this type may vary. Halogen lamps are equipped with lighting devices marked "G4" and "G9". The remaining socles of this type are used in fluorescent lamps.
The lamp base marked "GU" indicates that the appliance is energy efficient. Light bulbs of this type are like a pill. Such a lighting fixture is ideal for lighting cabinets, for decorating small interior items, as well as for suspended ceilings.
Base "R7s-7"
This type of cap has recessed contact. The main representatives of lighting devices with the "R7s-7" base are halogen quartz lamps. The main area of their application is high-intensity lighting installations.
For completeness of description, mention should be made of lamps with a pin base type "B", which is quite rare. Manufacturers also produce lighting fixtures with a "S" spotlight base, as well as an original "P" focusing base. Usually these are lamps of an unusual design, but they are almost never used in everyday life.