Using voice commands via the Amazon Echo's Alexa voice assistant or your smartphone to turn on your Philips smart light bulbs is convenient, but even better is just walking into a room and ta-daa!

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If you own Philips Hue smart bulbs, don’t think twice about adding Philips’ Hue motion sensor; it’s a nearly flawless upgrade to the Hue ecosystem. Motion-activated lighting isn’t a new idea. Whether ...

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We independently review everything we recommend. When you buy through our links, we may earn a commission. Learn more› By Rachel Cericola Rachel Cericola is a writer covering smart home. In addition ...

Some motion sensors are based on optical measurement technologies to provide accurate velocity and position measurements without requiring physical contact with the object or surface being monitored.