Yes that's pretty spendy. I'm guilty of not looking at the price after searching for piezoelectric light switch.
I attended a talk some years back by a high end yacht designer who thinks well outside the box (sorry, I don't recall his name). He used piezoelectric devices in his designs. One was piezoelectric light switches to place switches anywhere the owner wanted without having to pull wires. He did a number of other clever things with piezoelectric as well. A creative thinker.
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