The midwit home

  > I want a variant that works like this: If the power is quickly turned off and on again, the outlet switches from powered to unpowered (or vice-versa).

Philips has a line of bulbs called SceneSwitch that use this rapid on-off mechanism to change their brightness and color temperature to one of three levels. It’s funny because incandescent three-way bulbs and switches used to be very common. Now that everything is LED you need a complicated timer system to achieve the same result. I’m just happy to be able to dim my table lamps without a bunch of extra technology.

> It’s funny because incandescent three-way bulbs and switches used to be very common. Now that everything is LED you need a complicated timer system to achieve the same result.

Or just a dimmable LED bulb in an existing 3-way fixture.

....and a little label next to the switch so you know it's got a sceneswitch bulb.

I first learned about these from the author of 'calm technology' https://calmtech.com/

Dimmable bulbs and 3-way lamps are not compatible: https://en.m.wikipedia.org/wiki/3-way_lamp. The electrical principles are not the same —- a three way bulb has a different socket contact configuration to accept different wattages at each of the three levels. Supposedly LED 3 way bulbs exist but I’ve never seen one in the wild.