Photocell

usgb/ˈfoʊtəˌsɛl/
noun

A photocell is an electrical device that detects changes in light levels and activates or deactivates other electrical devices accordingly.

The photocell turned on the garden lights at dusk.
Visual representation of "photocell" - A photocell is an electrical device that detects changes in light levels and activates or deactivates other electrical devices accordingly.

Usage tips

Technical

light sensor,automatic lighting,energy-saving device

Definition 1 of 2
Visual representation of "photocell"
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Definition

A photocell is an important component in energy-saving technology.

Illustration for Definition
This sensor can help reduce electricity costs when used properly.
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Context

Using photocells in outdoor lighting can prevent the lights from being left on during the day.

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In some regions, it's common to see them in street lamps.
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Common Mistakes

Be careful not to confuse photocells with photometers; they serve different purposes.

Illustration for Common Mistakes
Some people might mistakenly think that all light sensors are photocells.
Visual representation of the word "Photocell"

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