Mxsmanic wrote in
:

Roger (K8RI) writes:

I seriously doubt they can. I can discern the flicker in *some*
fluorescent lights, but I can not discern 120 cps on a strobe. I
think what they are seeing is the "sputter" of a cold lamp or a light
that isn't starting correctly. The flicker I see in those lamps is
considerably slower than 120 or even 60 cps.

Peripheral vision is much more sensitive to flicker than central
vision. Some people will perceive an irritating flicker in a lamp or
computer monitor each time they turn away from it,

A bit like looking at you.
Bertie