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How does the Touchless Light Switch work?

A plain old toggle switch (POTS) passes all of the available power to the light or none of the available power to the light. When on, the Touchless Switch passes 99.9% of the available power to the load and keeps that tiny bit that’s left over for itself. And when it is off, the Touchless Switch withholds 99.9% of available power from the light but again keeps a tiny bit for itself in order to operate its electronics and sensor.

David