The pdf http://www.marvell.com/led-lighting/assets/Marvell_88EM8189_IC-01_product_brief.pdf describes a chip that can be used for low power wireless control, and can be powered directly from 120V line voltage.  Build a small wireless device (motor control, light dimmer….)  Note: this uses zigbee so you’d need to work on both ends of the network.

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