I am presently managing replacement of all incandescent/fluorescent fixtures in just over 1,000,000 square feet of medical offices, research labs and a medical school on a single campus.

There are two parts of an LED lamp/fixture.

a) The LED emitters themselves: These are pretty generic beasts, and while not-quite-one-size-fits-all, the same emitter may provide light from between 3000K to 5000K. They are also pretty bullet-proof.

b) The "Driver" - which is a device that takes current from some source and makes it into what the emitters want for a particular type (Temperature and CRI) of output.

Common failure modes a

flickering - 90% - and what you are experiencing.
Massive RF output - 5% - so massive as to even step on cell phones and blue-tooth frequencies on rare occasions, but mostly lower bands.
*POOF* on start - 5%
Sometimes more than one fault per item.

Whereas these drivers are not delicate items, they fail often enough as that such a failure should surprise no one. Our installing contractor states that failures on commercial-grade devices are somewhere between 0.25% and 2.5% depending on the country-of-origin of the drivers, and where the devices are assembled. Consumer-grade devices experience a much higher failure rate.

Most failures occur within the first 4-6 hours of use.

Keep the receipt, and return the flickering item.

Peter Wieck
Melrose Park, PA