The light slowly transforms from natural sunlight and moonlight at night to ancient kerosene lamps, Edison's tungsten filament bulbs, and nowadays LED lights.

More and more people initiate using LED lights for lighting. Whether it is day or night, you can see LED lights.

The light-emitting diode, like the semi-conductor laser, is a PN junction that emits light by injecting electrons into it from an external power source.

So far, the lighting field that LED enters is only the so-called particular lighting field, such as car lighting, urban landscape lighting, museum cultural relic art lighting, and backlight lighting.

Today, people have changed from the days and nights of the past to the era of light everywhere.

The LED industry is a new industry rising at the beginning of this century. With the rapid development of science and technology, the high-tech field has become one of the focuses of international competitions.

After this three-year epidemic, I think most people know how safe it is to have money in hand? 

Long ago, "wattage" was used to determine the brightness of a light bulb. The higher the wattage, the brighter the lamp.

Good lighting reduces the risk of health problems, increases safety, and enhances productivity.

To facilitate you to better understand the article, in understanding why the light bulbs series resistance, I would like to give you a little bit of knowledge about resistance.