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2. Get Black Friday savings already at Walmart: Shop the ... - AOL

   www.aol.com/lifestyle/get-black-friday-savings...

   These top-rated lights equipped with sensors that'll automatically shine a light (three of them, in fact) when they detect motion — important when you get home after dark and can't see a thing.

3. Motion detector - Wikipedia

   en.wikipedia.org/wiki/Motion_detector

   A motion detector attached to an outdoor, automatic light. A motion detector is an electrical device that utilizes a sensor to detect nearby motion (motion detection).Such a device is often integrated as a component of a system that automatically performs a task or alerts a user of motion in an area.

4. Headlamp (outdoor) - Wikipedia

   en.wikipedia.org/wiki/Headlamp_(outdoor)

   Variable light level, and flashing; Motion sensor to allow switching on and off by waving a hand with no need to operate a switch; Optional red light mode to preserve night vision; Both rechargeable and disposable batteries supported, to be able to provide light after the rechargeable battery is discharged

5. Google Nest - Wikipedia

   en.wikipedia.org/wiki/Google_Nest

   Nest Cam Outdoor was announced in July 2016 and is a version of the Nest Cam adapted for outdoor monitoring. The main differences from the Nest Cam Indoor is in its design which is built to withstand outdoor conditions. [70] In 2021, Google announced the second-generation, battery-powered Nest Cam Outdoor. [67]

6. Light-emitting diode - Wikipedia

   en.wikipedia.org/wiki/Light-emitting_diode

   One-color light is well suited for traffic lights and signals, exit signs, emergency vehicle lighting, ships' navigation lights, and LED-based Christmas lights Because of their long life, fast switching times, and visibility in broad daylight due to their high output and focus, LEDs have been used in automotive brake lights and turn signals.

7. Photoelectric sensor - Wikipedia

   en.wikipedia.org/wiki/Photoelectric_sensor

   A photoelectric sensor is a device used to determine the distance, absence, or presence of an object by using a light transmitter, often infrared, and a photoelectric receiver. They are largely used in industrial manufacturing. There are three different useful types: opposed (through-beam), retro-reflective, and proximity-sensing (diffused).