Led bulb flickering can be traced in almost every instance to a non compatible dimmer switch in the lighting circuit.
Led ceiling light flashes.
Faulty light or fixture switch.
They are all the same.
I put two of the working lights in flashing fixture and they strobed as well.
The 4th flashes on an off like a strobe.
Try gently wiggling the switch to see if this causes a flicker.
If it does you ve found the problem.
This professional electrician should not make mistakes.
Common cause of ceiling fan light problems.
It only happens in the one fixture.
That may be all you need to do but if the bulb still flickers remove it and try another bulb.
I have 4 ceiling lights.
If the led light flashes when it is turned off we first need to eliminate the circuit problem that is the switch touches the live wire and the zero wire touches the electrical appliance.
A poor connection between the light or fixture switch and the bulb can cause flickering.
If your light is already flickering try toggling the switch on and off and see if this fixes the problem.
Additional possibilities with ceiling fan light strobe.
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The most common cause of ceiling fan lights that strobe like this is due to wrong size light bulbs more specifically the light bulb size may be too large so i would check this first and make sure they are the recommended size.
If the flickering bulb is a cfl try replacing it with an led or incandescent bulb.
Modern dimmer switches create the dimming effect by switching the power supply.
In 3 lights they are fine and bright.