Is AAA necessarily better than AA? In fact, eye protection grades AA and AAA do not refer to the same thing. The so-called national AA refers to the national standard GB/T9473-20 17 Performance Requirements for Reading and Writing Table Lamps. There are two levels of illuminance and uniformity of desk lamps: country A and country AA, and country AA stands for the highest level of illuminance and uniformity.

And AAA is a healthy lighting level certified by the International Lighting Commission, which means that the light is healthy. Therefore, the eye protection level AA and AAA cannot be confused. They mean two different things. Don't be misled by the manufacturer when buying eye protection lamps.

light

Where there is light, there is human civilization. Tens of thousands of years ago, human beings knew to use the fire of nature to keep out the cold, barbecue and light. More than 3000 years ago, humans began to carry candles with simple lamps and write the history of civilization. From rough stone lamps to bronze lamps, ceramic lamps to modern electric lamps, the historical changes of lamps are deeply branded with the times and are also the epitome of social economy and culture.

When did the words "lamp" and "lamp" originate? In the Western Zhou Dynasty, "candle" was a kind of torch made of flammable materials, which was used to hold the lit torch and was called candle. Piles of fine grass and branches placed on the ground for lighting are called materials, those placed outside the door are called big candles, and those placed inside the door are called pavilion materials.