[Urd-]

How about waving your arm once to turn on a light switch and then wave it again to turn it off?

[vidanay]

Kind of like moving a wall switch up once, and then down once?

[Urd-]

Yes that was the idea. :)

[bryanrasmussen]

then you are back to having a light switch that you might absentmindedly forget to turn off costing money.