What device is used to produce light in electrical systems?

In electrical systems, a lamp is the primary device used to produce light. Lamps convert electrical energy into light energy through various mechanisms depending on the type of lamp. For example, incandescent lamps use a filament that glows when electric current passes through it, while fluorescent lamps use gas and phosphor coatings to emit light when energized by electricity. Additionally, LED lamps utilize semiconductor materials to emit light efficiently.

While resistors, transformers, and fuses play important roles in electrical circuits—regulating current, transforming voltage levels, and providing overcurrent protection respectively—they do not convert electrical energy into light. This distinguishes lamps as the essential components specifically designed for illumination in electrical systems. Understanding the unique function of a lamp in relation to other electrical devices clarifies its pivotal role in producing light.