Description Of A Lamp Or Light Bulb English (1) n6b4y

DESCRIPTION OF A LAMP or LIGHT BULB Every lamp consists of 3 distinct parts: Bulb, Base and Filament. BULB: Usually the bulb is made of either glass or quartz. Theoretically, it could be of any size or shape. It may also be clear, frosted, coloured or partially silver-mirrored. Some of the typical shapes and their industry designations are:

BASE: The base of a lamp is usually made of metal, and serves two purposes: (1) to conduct the electric current to the filament, and (2) to secure the lamp in its socket. There are over 150 different types of bases. Please see the "pdf" page for the commonly used types. To simplify identification of the bases, we assign a unique number for every type. The base number constitutes the 3rd element of the Catalogue No., the 1st being the Voltage, the 2nd being the Wattage, and the 3rd being the base. Typical numbering of the various types of bases: Bayonet Pin Screw Prefocus Cap Special

( 00 ( 20 ( 45 ( 56 ( 70 ( 80

to 19 ) to 44 ) to 55 ) to 69 ) to 79 ) to 120)

Example: "Ba15d" “B..” , “Ba..” “G”, “GX”, “GY”, “GZ” Example: "G6.35" Example: "E26" “E..” “P”, “PG”, “PK”, “PX”, Example: "P30s" Example: "R7s" “S”, “SF”, " “F”, “FER”, “S”, “SK”, “SS”, “SCR” etc.

The number following the industrial designation letter/s is the diameter in millimeters of the base (e.g. Ba15d = Bayonet, 15mm diameter, double ); or the distance in millimeters between the pins (e.g. G6.35 = 2-pins, 6.35mm apart centre to centre). Bayonet bases are also identified by the letters “S” or “SC” for “Single ”; and “D” or “DC” for “Double ”. FILAMENT: Usually made of tungsten wire, and emits light when an electric current es through it. Its length, diameter and shape varies to suit the application for which the lamp was originally designed. It is the heart of every incandescent lamp. Typical shapes are:

Lamps, in most cases, are marked with an ANSI number and/or letters. ANSI is the acronym for the American National Standards Institute, and is widely recognized in North America and internationally. However, the Europeans have their own standards. So are the Japanese. This code is supposed to be uniform, and should identify the lamps in all respects. Some lamps are marked with their design Volts (V), Watts (W), or Amperes (A). Some other lamps may have no marking at all, except perhaps the name of the manufacturer or the country of origin. With our Cross-Reference database, we are able to identify most lamps, with any number or designation, whether it be the 3-letter ANSI code, any combination of numbers and letters, or even the commercial catalogue numbers assigned by international instrument manufacturers or their local distributors. Our Cross-Reference Guide on the preceding pages might be all you need to identify and order the proper replacement lamp. If all else fails, please feel free to us and we will gladly advise you.