It's PWM dimming. I see it most on Cadillac SUVs. Drives me nuts too. They could...

		sathackr 11 months ago \| parent \| context \| favorite \| on: The origins of 60-Hz as a power frequency (1997) It's PWM dimming. I see it most on Cadillac SUVs. Drives me nuts too. They could design it not to be that low of a frequency but apparently someone thought that 40-50hz was imperceptible to humans and went with it