On Wed, 19 Dec 2018 23:34:08 -0500, Clare Snyder, another brain damaged,
troll-feeding, senile Yankietard, blathered:


so 50 Htz - you can almost see an incandescent flicker at that
frequency (at 25 you could)

(also rules out the previously mentioned "engineer friend")

Gosh... are you daft!