halide pulsing

Practicing smooth panning while intermittently screwing up panning shots of cars passing, this pic turned up in the bunch where you can count the pulses and knowing it's a 60Hz power system and that two pulses occur ever second, calcuate nearly exactly the quarter second shutter time. Artistic value? Search me but it does look kinda otherworldly but that's no great shakes. Thought I'd throw it out there for comment, TIA.

That should read 'two pulses per cycle', not 'two pulses per second'.

Really makes you look for a while to try figure out what it is. And for that, it wins my vote