The filter capacitor is the primary culprit for the malfunction.
The cause of light source flickering could be the failure to match the led lamp bead with the led drive power supply. Normally, a 1w lamp bead has the capacity to withstand a current of 280-300mA and a voltage of 3.0-3.4V. If the lamp bead chip is not powerful enough, there could be disruptions in the light source. In such cases, the lamp bead might turn on and off repeatedly, and there could be burning of the gold or copper wire built within the lamp bead, leading to the bead's failure to light up.
In the event that the driving power supply is not functioning properly and causing the flashing, a simple solution would be to replace it with a functioning power supply. Once this is done, the issue of flashing will be resolved.
If the lamp's heat dissipation performance is not up to par and the driver has an over-temperature protection function, it will flash and shut off when it starts working. For instance, if a 20W floodlight housing is utilized to create a 30W lamp and proper heat dissipation measures are not taken, the driver's over-temperature protection will be triggered.
In the event that the outdoor lamp is displaying a flickering pattern, it is highly likely that water has penetrated inside. This will result in the light not turning on, and damages will occur to the lamp beads and driver. If the driver is waterproof, the only issue would be the replacement of the light source. However, if the driver is not waterproof, both the lamp beads and driver will require replacements.
The solution to the flashing led light:
If you experience a flickering light after turning it off, the first thing to do is to check for possible wiring issues. Normally, the problem may arise from the neutral wire that is controlled by the switch. It is important to fix this issue promptly to avoid potential hazards. One effective solution is to switch the live wire to the neutral wire, while linking the neutral wire to the light source. This approach will help ensure stability and safety in your electrical system.
If the circuit is functioning properly, then it could be that the LED bulb has produced self-inductance current. One possible solution would be to purchase a 220V relay and link the coil to the light in series, which would resolve the issue.
Precautions:
It is important to match the LED lamp bead with the correct LED drive power supply. Generally, a single 1W lamp bead should be able to tolerate current up to 280-300mA and voltage within 3.0-3.4V. Using a chip that lacks enough power could lead to a flickering light source, while excessively high current may result in the light turning on and off. In addition, if the voltage is too high, the gold wire or copper wire inside the lamp may burn out, causing the lamp to not function.