Have you tried this with incandescent bulbs?
They flicker at 120Hz too... since they are P=I^2R and driven directly from 60Hz lines. I don't know the amplitude variation that bothers you, but then I don't mind LED bulbs.
Of course it's not the LEDs that do this but the cheap AC-DC conversion bridge rectifier.
Yeah, but because incandescent bulb filament's retains enough heat to continue to glow between peaks, their flickering is almost negligible - especially compared to poorly designed LED and CF bulbs.
Of course it's not the LEDs that do this but the cheap AC-DC conversion bridge rectifier.