Definition, Meaning & Synonyms
photocell
noun
/ˈfoʊtəʊˌsɛl/
Definition
A photocell is a device that uses light to control electrical circuits.
Examples
- The photocell turned on the garden lights at dusk.
- Many street lights use a photocell to save energy by only operating when it’s dark.
- After replacing the faulty photocell, the automatic porch light functioned correctly again.
Meaning
It is often used in outdoor lighting systems to automatically turn lights on or off based on the amount of natural light present.
Synonyms
- light sensor
- photoresistor
- light-dependent resistor (LDR)
