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  2. Parabolic aluminized reflector - Wikipedia

    en.wikipedia.org/wiki/Parabolic_aluminized_reflector

    Usage includes theatrical lighting, locomotive headlamps, aircraft landing lights, and residential and commercial recessed lights ("cans" in the United States). Many PAR lamps are of the sealed beam variety, with a parabolic reflector , one or more filaments , and a glass or plastic lens sealed permanently together as a unit.

  3. Passive infrared sensor - Wikipedia

    en.wikipedia.org/wiki/Passive_infrared_sensor

    PIR sensors are commonly used in security alarms and automatic lighting applications. PIR sensors detect general movement, but do not give information on who or what moved. For that purpose, an imaging IR sensor is required. PIR sensors are commonly called simply "PIR", or sometimes "PID", for "passive infrared detector". The term passive ...

  4. 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.

  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. Kurifier Solar Torch Lights are on sale and perfect for ...

    www.aol.com/lifestyle/kurifier-solar-lights...

    What fans say. More than 6,000 Amazon shoppers have given these lights glowing reviews. Each torch sits on a plastic stake and pole that can be inserted directly into the ground sans tools. "Super ...

  7. Security alarm - Wikipedia

    en.wikipedia.org/wiki/Security_alarm

    PIR sensors identify abrupt changes in temperature at a given point. As an intruder walks in front of the sensor, the temperature at that point will rise from room temperature to body temperature and then back again. This quick change triggers the detection. PIR sensors designed to be wall- or ceiling-mounted come in various fields of view ...

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