I’m fairly sensitive to high frequencies, whether it’s noise or light flicker. Which is to say that CRTs are the bane of my bleeding headache.
So the lights have an imperceptible flicker, and the regulator has a little hum. I think… after telling a coworker about my project, that I’ll want to change out from just going high, to going almost high via PWM, thereby I’ll new able to adjust the frequency (maybe).