Photocell

Photocell

A light sensing device used to control luminaires and dimmers in response to detected light levels.

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Part of Speech: noun
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Industry/Domain: Construction
Category: Lighting
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Related terms

photocell

Electronic components; Resistors

A light-controlled variable resistor which has a light-to-dark resistance ratio of 1:1000.

photocell

Agriculture; Animal feed

Device used to detect the presence of an object. A photocell is composed of a transmitter, which transmits an infrared signal to a receiver or reflector.

photocell

Construction; Lighting

A light sensing device used to control luminaires and dimmers in response to detected light levels.

photocell

Advertising; Billboard advertising

Photoelectric cell; the light-sensitive component within a photosensor. The actual device might be a photodiode, a phototransistor, or a photoconductive cell. It is important to ...

photocell

Energy; General

A device that produces an electric reaction to visible radiant energy (light).

photocell

Science; General science

Any of several devices that produce an electric signal in response to exposure to electromagnetic radiation. The original photocells utilized photoemission from a photosensitive ...

cistern

Construction; Architecture; Building/real property; Carpentry; Demolition/excavation

water recipient like a well or a tank

low-voltage lamp

Construction; Lighting

A lamp ( typically compact halogen ( that provides both intensity and good color rendition. Lamp operates at 12V and requires the use of a transformer. Popular lamps are MR11, ...

high pressure sodium lamp

Construction; Lighting

A high intensity discharge (HID) lamp whose light is produced by radiation from sodium vapor (and mercury).

lay-in-troffer

Construction; Lighting

A fluorescent fixture; usually a 2' x 4' fixture that sets or "lays" into a specific ceiling grid.

very high output (VHO)

Construction; Lighting

A fluorescent lamp that operates at a "very high" current (1500 mA), producing more light output than a "high output" lamp (800 mA) or standard output lamp (430 mA).

tungsten halogen lamp

Construction; Lighting

A gas-filled tungsten filament incandescent lamp with a lamp envelope made of quartz to withstand the high temperature. This lamp contains some halogens (namely iodine, chlorine, ...

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