I like the way the interior lights in newer cars fade to off. Out of
curiosity, are those fading bulbs, or are do cars have a wired-in piece of
electronics that controls the light. I'd like to emulate that effect with
certain lights inside the house.

I've been googling around, probably using poor terms like fading light bulbs
and light switch fade. Are there products I can buy that will do this,
other than regular dimmers?

thanks,
Keith