In article , Pop wrote:
Most likely, the earth ground is missing or has opened up
somewhere.
Was it worked on lately? Maybe it's miswired inside the fixture.
Not much else can cause one to flicker with the switch off.

Please stop top-posting.

A defective switch would be my first thought. A kitchen is a high
use area and a cheap switch may have worn out. I've used "industrial"
grade switches and sockets whereever I have to replace anything in my
own home. It's $0.39 for a homeowner grade unit, $3.90 for commercial
and probably $5.95 for industrial grade ( at home depot ).

I don't particularly enjoy simple electrical repairs; I want to do the
job one time and have it last until after I die of old age. Spend the
six bucks and forget about it.