Its principle is to inject halogen gas such as iodine or bromine into the bulb. When the filament heats up, the tungsten atoms are evaporated and move toward the glass tube wall, combining with the halogen in the lower temperature area to form tungsten halides. Tungsten halides will move toward the filament. Because the filament temperature is high, tungsten halides are decomposed into tungsten and halogen, and tungsten is redeposited on the filament. This cycle allows the filament to work at a higher temperature, thereby emitting more heat and light.
Halogen heating lamps have high heating efficiency, can heat up quickly, and can accurately control the temperature. It is widely used for industrial heating, such as drying paint and heating plastics; in the medical field, it is used for physical therapy equipment; in the home, it can be used for food heating, such as small halogen heaters are also common. However, when using it, pay attention to its high surface temperature to avoid burns, and prevent it from contacting with flammable materials to avoid fire.
