light pollution: meaning, definition, pronunciation and examples
Low to MediumTechnical, Environmental, Academic
Quick answer
What does “light pollution” mean?
The presence of excessive, misdirected, or obtrusive artificial light in the environment.
Audio
Pronunciation
Definition
Meaning and Definition
The presence of excessive, misdirected, or obtrusive artificial light in the environment.
Any adverse effect or degradation of the natural nighttime environment caused by artificial light, including skyglow, glare, light trespass, and energy waste, which disrupts ecosystems, astronomical observation, and human health.
Dialectal Variation
British vs American Usage
Differences
No significant lexical differences. Potential spelling variations in related documentation (e.g., 'behavioural impacts' vs. 'behavioral impacts').
Connotations
Identical. Connotes negative environmental impact, wastefulness, and a loss of natural darkness.
Frequency
Usage frequency is comparable, with a slight edge in American English due to widespread discussion of dark-sky ordinances and astronomy.
Grammar
How to Use “light pollution” in a Sentence
Light pollution + VERB (disrupts, affects, increases)ADJECTIVE (excessive, urban, astronomical) + light pollutionPREP (due to, because of, fight against) + light pollutionVocabulary
Collocations
Examples
Examples of “light pollution” in a Sentence
verb
British English
- The new development will light pollute the entire valley.
- We must avoid light-polluting sensitive habitats.
American English
- Poorly designed fixtures light pollute our neighborhoods.
- The ordinance aims to prevent light polluting the night sky.
adverb
British English
- The streetlights were installed less light-pollutingly than before. (rare)
American English
- The stadium is now lit more responsibly and less light-pollutingly. (rare)
adjective
British English
- The light-polluted sky made astrophotography impossible.
- We studied light-pollution levels across the county.
American English
- They moved to a less light-polluted area for better stargazing.
- The light-pollution map showed hotspots in major cities.
Usage
Meaning in Context
Business
Discussing the cost implications of inefficient outdoor lighting and corporate sustainability reports.
Academic
In environmental science papers on ecological impacts or astronomy journals on observational limitations.
Everyday
Complaining about a neighbour's bright security light or planning a stargazing trip away from cities.
Technical
Specifying 'full-cutoff luminaires' in municipal lighting ordinances to mitigate light trespass.
Vocabulary
Synonyms of “light pollution”
Strong
Neutral
Weak
Vocabulary
Antonyms of “light pollution”
Watch out
Common Mistakes When Using “light pollution”
- Using 'light pollution' to refer to light bulbs being dirty.
- Incorrect pluralisation: 'light pollutions' is rare and usually incorrect.
FAQ
Frequently Asked Questions
No. While it severely hinders astronomy, it also disrupts ecosystems (affecting wildlife migration, reproduction, and predation), impacts human health (circadian rhythm and sleep), and wastes energy.
Yes. Using shielded, downward-facing fixtures, employing motion sensors, reducing over-lighting, and using warmer-coloured LEDs can maintain safety while drastically cutting glare, skyglow, and energy use.
Skyglow is the brightening of the night sky over inhabited areas, a dominant form of light pollution. It's the orange-ish haze seen over cities, caused by artificial light being scattered in the atmosphere.
The term gained prominence in the 1970s with the growing dark-sky movement, though concerns about artificial light obscuring stars were noted by astronomers much earlier.
The presence of excessive, misdirected, or obtrusive artificial light in the environment.
Light pollution is usually technical, environmental, academic in register.
Light pollution: in British English it is pronounced /ˌlaɪt pəˈluːʃn/, and in American English it is pronounced /ˌlaɪt pəˈluːʃn/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “To blot out the stars (related concept)”
- “A blanket of light (descriptive of skyglow)”
Learning
Memory Aids
Mnemonic
Think of 'pollution' not as dirt, but as 'too much of something in the wrong place' – here, it's too much light in the night sky.
Conceptual Metaphor
LIGHT IS A POLLUTANT / THE NIGHT SKY IS A NATURAL RESOURCE (that can be degraded).
Practice
Quiz
Which of the following is NOT a primary component of light pollution as defined by environmental scientists?