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2. Passive infrared sensor - Wikipedia

   en.wikipedia.org/wiki/Passive_infrared_sensor

   A passive infrared sensor (PIR sensor) is an electronic sensor that measures infrared (IR) light radiating from objects in its field of view. They are most often used in PIR-based motion detectors . PIR sensors are commonly used in security alarms and automatic lighting applications.

3. Staircase timer - Wikipedia

   en.wikipedia.org/wiki/Staircase_timer

   Combined PIR sensor and lightswitch. PIR sensors may be used to control lighting in such areas. They avoid the need to press a push-button but otherwise operate as for electronic timers. As PIR sensors are not perfectly reliable a timer is needed to avoid the lights flashing off and on as the occupier moves out of detector range.

4. 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.

5. Find Christmas light displays in Columbus using our map

   www.aol.com/christmas-light-displays-columbus...

   Commercial and public Christmas light displays Columbus Commons Holiday Lights. Address: 160 S High St., Columbus, OH 43215. See 400,000 LED lights in the park. Open daily from 5-11 p.m. Runs ...

6. Occupancy sensor - Wikipedia

   en.wikipedia.org/wiki/Occupancy_sensor

   Occupancy sensor types include: PIR sensors, which work on heat difference detection, measuring infrared radiation.Inside the device is a pyroelectric sensor which can detect the sudden presence of objects (such as humans) who radiate a temperature different from the temperature of the background, such as the room temperature of a wall.

7. Ohio could see northern lights this weekend. But what are ...

   www.aol.com/ohio-could-see-northern-lights...

   Get away from city lights and avoid trying to see them on the night of a full moon. The best time to view the aurora is within an hour or two of midnight, or 10 p.m. to 2 a.m. Ohio weather ...