1. The LED turns dark after running for a while, which is caused by the excessive current flowing through the lead of the switching power supply. Check whether the total current of the lead exceeds the current value output by the switching power supply. If so, replace the power lead.

2. When the LED is just powered on, it is very bright. After a period of time, it suddenly does not light up or the brightness decreases. You can check whether the switching power supply is 12V, and the LED is misused to 24V.

3. If there is no problem, check whether the input voltage of the switching power supply is 220V. If the LED brightness is high or low: check whether the input voltage and output voltage of the switching power supply are normal. If the voltage is too high, the LED will burn out; If the voltage is low, it will cause the led not to light or brightness attenuation. If the voltage in the user's location is very unstable, it is recommended that the user install a voltage regulator