A motion sensor activates the light when it detects something moving within its field of view. Photocells work with a resistor that changes its conductivity based on how many photons are hitting it.

Another tool making its way into smart homes is radar. The basic idea is simple: send out a signal, and then measure how it ...

The Caséta Smart Motion Sensor’s battery should last about 10 years, according to Lutron. It will be available in February for $49.95. [ Further reading: The best LED smart bulbs ] ...

After months of delay, the Xiaomi Smart Ceiling Light D20 is finally available to buy. Its standout feature is a built-in radar sensor that detects motion to automatically turn the light on or off.

Aqara’s Thread-based Motion and Light Sensor P2 ($33.99) has been on my smart home wish list since it was announced way back in 2022 — and now, it’s finally here.

Ring says its outdoor motion sensor “lets you monitor for motion in areas where you don’t need a light, doorbell, or camera….” That seems like a silly justification at first blush.

A new feature coming to Signify’s WiZ app this month can turn its smart bulbs and light fixtures into motion sensors. It automatically switches the lights on or off when it detects a person in ...

Xiaomi has unveiled the Smart Ceiling Light D20 on its website, featuring a smart radar light sensor for automatic motion detection and a slim 6 cm design. Launch date, pricing and availability ...

The Philips Hue Motion Sensor will trigger your Hue light bulbs went it detects motion and works with devices connected to your Alexa, Google, or HomeKit smart home ecosystem. Designed for indoor ...

The luminosity sensor allows for light-based triggers alongside motion ones. So a person entering a room in daylight might, for example, trigger a fan to turn on. But someone entering the same ...