Thermal radiation source
It is made by the principle of radiation and light emission when the object is heated to high temperature. This type of light has a simple structure and is easy to use. It can be used when the rated voltage of the bulb is the same as the power supply voltage.
Gas discharge light source
Made using the principle of light emission when current passes through a gas. This kind of light has high luminous efficiency, long life and many kinds of light colors.
Semiconductor light source
Including phosphors emit light under the action of an electric field, or semiconductor p-n junctions emit light. This type of light is only used in places that require special lighting.