用英语介绍电灯的用处

发布网友发布时间：2022-04-19 22:53

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热心网友时间：2023-08-04 17:25

Lamp, or light fixtures, is an electrical device used to create artificial light by use of an electric luminate device. All light fixtures have a fixture body and a light socket to hold the lamp and allow for its replacement. Fixtures may also have a switch to control the light. Fixtures require an electrical connection to a power source; permanent lighting may be directly wired, and moveable lamps have a plug. Light fixtures may also have other features, such as reflectors for directing the light, an aperture (with or without a lens), an outer shell or housing for lamp alignment and protection, and an electrical ballast or power supply. A wide variety of special light fixtures are created for use in the automotive lighting instry, aerospace, marine and medicine.