Is it correct to say 'an LED' or 'a LED'?

It is 'an LED' because the abbreviation is pronounced starting with a vowel sound (/ˌɛl iː ˈdiː/), making 'an' the correct indefinite article.

What's the difference between LED and OLED?

LED (Light-Emitting Diode) typically refers to inorganic semiconductor diodes. OLED (Organic Light-Emitting Diode) uses organic compounds that emit light, allowing for thinner, flexible displays with potentially better contrast.

Can 'LED' be used as a plural?

Yes. The standard plural is 'LEDs' (e.g., 'The circuit board has twelve LEDs'). Using 'LED's' as a plural is incorrect.

Why is the term 'light-emitting diode' hyphenated?

It is hyphenated when used as a compound modifier (e.g., 'light-emitting diode technology') to show that the three words function together as a single unit modifying the noun that follows. When used as a noun phrase on its own, hyphens can be used but are often omitted in favour of the abbreviation 'LED'.

Is “light-emitting diode” formal?

Light-emitting diode is usually technical/formal in register.

How do you pronounce “light-emitting diode”?

Light-emitting diode: in British English it is pronounced /ˌlaɪt ɪˈmɪtɪŋ ˈdaɪəʊd/, and in American English it is pronounced /ˌlaɪt ɪˈmɪt̬ɪŋ ˈdaɪoʊd/. Tap the audio buttons above to hear it.

light-emitting diode: meaning, definition, pronunciation and examples

C1/C2 (Technical term, high frequency in specific domains like technology, engineering, and consumer electronics)

UK/ˌlaɪt ɪˈmɪtɪŋ ˈdaɪəʊd/US/ˌlaɪt ɪˈmɪt̬ɪŋ ˈdaɪoʊd/

Technical/Formal

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Quick answer

What does “light-emitting diode” mean?

A semiconductor device that emits light when an electric current passes through it.

Audio

Pronunciation

Definition

Meaning and Definition

A semiconductor device that emits light when an electric current passes through it.

A highly energy-efficient form of solid-state lighting that produces illumination via electroluminescence, now widely used for lighting, display, and indicator purposes.

Dialectal Variation

British vs American Usage

Differences

No significant differences in meaning or usage. Both varieties use the abbreviation 'LED' predominantly.

Connotations

Identical. Connotes efficiency, modernity, and technological advancement.

Frequency

The frequency of the full term vs. 'LED' is virtually identical in both varieties, with 'LED' being overwhelmingly more frequent. Spelling and punctuation are consistent.

Grammar

How to Use “light-emitting diode” in a Sentence

[The/An] LED [verb: emits, produces, uses, contains, is powered by]Replace [incandescent bulb/component] with [an] LEDThe [device] is [equipped/fitted] with [an] LED

Vocabulary

Collocations

strong

LED screenLED displayLED bulbLED technologyenergy-efficient LED

medium

brightness of the LEDinstall an LEDan array of LEDsmanufacturer of LEDs

weak

powerful LEDcheap LEDmain LEDbroken LED

Examples

Examples of “light-emitting diode” in a Sentence

verb

British English

The signage will be LED-lit for maximum visibility.
The entire façade can be LED-illuminated.

American English

The pathway is LED-lit for safety.
We plan to LED-illuminate the monument.

adverb

British English

[Not applicable; 'LED' is not used adverbially]

American English

[Not applicable; 'LED' is not used adverbially]

adjective

British English

We are upgrading to a full LED lighting scheme.
The LED display panel requires specialist calibration.

American English

The new LED streetlights are much brighter.
Check the LED indicator on the router.

Usage

Meaning in Context

Business

"The company's Q3 revenue was driven by strong sales in its LED lighting division."

Academic

"The study compared the photometric efficiency of organic light-emitting diodes (OLEDs) with traditional inorganic LEDs."

Everyday

"We should swap out these old bulbs for LED ones to save on the electricity bill."

Technical

"Forward voltage and luminous intensity are key parameters when characterizing an LED for a new circuit design."

Vocabulary

Synonyms of “light-emitting diode”

Strong

LED

Neutral

LEDsolid-state lightsemiconductor lamp

Weak

indicator lightlight sourcebulb (in context)lamp (in context)

Vocabulary

Antonyms of “light-emitting diode”

incandescent bulbhalogen lampfluorescent tube

Watch out

Common Mistakes When Using “light-emitting diode”

Incorrect hyphenation: 'light emitting-diode' or 'light emitting diode' (without hyphens when used as a noun phrase before another noun). Correct: 'LED bulb' or 'light-emitting-diode bulb'.
Pronouncing 'diode' as /ˈdiːoʊd/ instead of /ˈdaɪoʊd/.
Using 'lights' for multiple LEDs (while acceptable, 'LEDs' is more precise).

FAQ

Frequently Asked Questions

: It is 'an LED' because the abbreviation is pronounced starting with a vowel sound (/ˌɛl iː ˈdiː/), making 'an' the correct indefinite article.
: LED (Light-Emitting Diode) typically refers to inorganic semiconductor diodes. OLED (Organic Light-Emitting Diode) uses organic compounds that emit light, allowing for thinner, flexible displays with potentially better contrast.
: Yes. The standard plural is 'LEDs' (e.g., 'The circuit board has twelve LEDs'). Using 'LED's' as a plural is incorrect.
: It is hyphenated when used as a compound modifier (e.g., 'light-emitting diode technology') to show that the three words function together as a single unit modifying the noun that follows. When used as a noun phrase on its own, hyphens can be used but are often omitted in favour of the abbreviation 'LED'.
: A semiconductor device that emits light when an electric current passes through it.
: Light-emitting diode is usually technical/formal in register.
: Light-emitting diode: in British English it is pronounced /ˌlaɪt ɪˈmɪtɪŋ ˈdaɪəʊd/, and in American English it is pronounced /ˌlaɪt ɪˈmɪt̬ɪŋ ˈdaɪoʊd/. Tap the audio buttons above to hear it.

Phrases

Idioms & Phrases

“[No specific idioms; the term is technical]”

Learning

Memory Aids

Mnemonic

Think of it as a Light Emitting Device (L-E-D) - a small device that EMITS LIGHT when you apply electricity.

Conceptual Metaphor

LED as WORKER: highly efficient, long-lasting, cool-running (doesn't waste energy as heat).

Practice

Quiz

Fill in the gap

Modern traffic signals now almost exclusively use technology for its reliability and low energy consumption.

Multiple Choice

What is the primary technological advantage of a light-emitting diode over an incandescent bulb?