Lamp holder refers to the interface connected to the end of the electric light wire for installing light bulbs, which should be used with caution. Electric light sources mainly use the naming method of lamp caps and holders. The lamp head is the end of the light bulb, which is the connection between the light source and the external power source. The light source is connected to the lamp head and generates light emission. The light source body mainly includes lamp beads, bulbs, and tubes, among which the tubes also include straight tubes and curved tubes. Lamp beads are mainly the form of light sources for LED lamps, while bulbs are generally incandescent lamps, fluorescent lamps, halogen tungsten lamps, etc. Lamp tubes are mainly common fluorescent lamps. The majority of lamp holders are in the form of light bulbs, as the lamp beads do not have a lamp holder. The small lamp beads are connected together through other structures, which act as lamp holders. The specific form depends on the design of the lamp. The places where the plugs on both sides of the straight light tube are inserted serve as lamp caps, similar to curved light tubes One of the purposes of this symbol system is to make each designated symbol brief, easy to read, and helpful in indicating its purpose. The symbol system consists of letters, numbers, and symbols, each with its own meaning. Each specific lamp cap and holder should only be named with one symbol, and this symbol system cannot be used to identify the material used for the lamp cap and holder. The various parts of a certain symbol system should be directly connected together without gaps or other separating symbols The complete symbol of the lamp cap and holder adopts the following form Lamp cap symbol: (a) (b) (c) - (d)/(e) × (f)
Lamp holder symbol: (a) (b) (c) - (d) Note: Abbreviated lamp holder symbols can be used, but such abbreviations should not cause misunderstandings The symbol before the diagonal line in the lamp cap symbol represents important content for interchangeability of a lamp cap in the corresponding lamp holder. The specific part in the symbol is the same for the lamp holder and the lamp holder used. The part after the diagonal line in the lamp holder symbol (if present) represents certain important dimensions of the lamp holder, but these dimensions are not a necessary part of the lamp's interchangeability requirements in the lamp holder. However, this size is crucial for the common interchangeability of lamp caps from different sources installed on the same model of lamp
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