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.

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.

The light turns on only when the motion is detected by the PIR motion sensor. The lamp is powered with 3 AAA batteries (in total 4.5 V) and it has a red LED blinking signal to notify about batteries ...

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.

When I was scrolling through my TikTok feed one night, though, I landed on a video praising the user-friendly, easy-to-install EZVALO Rechargeable Motion Sensor Light ($21), available on Amazon.

For Philips Hue systems, the official Hue Motion Sensor ($40 on Amazon) integrates easily with your existing smart-light setup. You can tell it to be active only at certain times, like at night.

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 Motion Sensor Night Light 2 is a versatile, smart lighting solution that makes your nighttime navigation safe and comfortable. Its innovative features, combined with a user-friendly design ...

It also pairs directly with an IKEA smart bulb. Speaking of light, there's the Vallhorn wireless motion sensor, which activates lights when movement is detected.