Two circuits of LED Planting shadowless lamp

When treating patients, LED Planting shadowless lamp is a necessary kind of medical equipment, and it will be needed to illuminate, without shadow blocking the doctor's sight. LED Planting shadowless lamp has two circuits. Which two are the specific ones?

1. AC and DC high and low voltage, transformer coupling self-excited circuit: Surgical LED Planting shadowless lamp often uses AC power supply 220V, and then uses ballast to ignite the lamp, or 9V DC power supply. This Angzhan power supply is controlled by a switch. "1" gear is 220V AC power supply, when it is set to "2" gear, DC power supply 9V.
2. AC and DC low voltage, transformer-coupled self-excited circuit: LED surgery LED Planting shadowless lamp mostly uses 220V AC, and then it is reduced to 12V by a step-down transformer, and the oscillator is operated by the bridge rectifier to ignite the lamp. In addition, it can also be used 9V DC power supply control.
The two circuits of LED Planting shadowless lamp are mainly the above points. When it is turned on, the voltage inside will also change to a certain extent. When not in use, be sure to check the circuit condition at any time to prevent it from being unusable due to abnormal circuit.