A light switch is the simplest of electrical devices. Flip the switch, electricity flows. Flip it again, electricity stops. Lights on, lights off. That’s great for a small room with one entrance.

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Smart switches are great, but you can’t just drop any old thing into a three-way switch that turns a light on and off from two different locations. Today, Amazon is selling TP-Link’s Kasa Smart ...

Posts from this topic will be added to your daily email digest and your homepage feed. Smart lighting is the most important innovation in lighting since the invention of the lightbulb. It adds so much ...