What is a halogen lamp?
Release Time：2019-09-30
Abst：Later, people found that the addition of halogen gas can evaporate the tungsten back to the tungsten wire up, andcam also the fast evaporation of tungsten to extend the life, so it is called halogen.
Later, people found that the addition of halogen gas can evaporate the tungsten back to the tungsten wire up, andcam also the fast evaporation of tungsten to extend the life, so it is called halogen.
