Light Pollution

Commenters discuss light pollution from artificial sources like streetlights and city lights, its negative effects on sleep, melatonin, and the natural night sky, often contrasting it with natural sunlight availability and viewing conditions.

πŸ“‰ Falling 0.3x Science
3,781
Comments
20
Years Active
5
Top Authors
#6447
Topic ID

Activity Over Time

2007
3
2008
13
2009
14
2010
52
2011
66
2012
53
2013
139
2014
107
2015
98
2016
179
2017
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2018
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2019
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2020
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2021
332
2022
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2023
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2026
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Keywords

OP earthobservatory.nasa SAD D3 light sunlight dark artificial bright night lighting lights sunny lit

Sample Comments

georgefox β€’ Jun 23, 2011 β€’ View on HN

It must be hard to sleep at night with all that light.

zapdrive β€’ Oct 8, 2023 β€’ View on HN

Not all of us are lucky enough to have an year round sunlight supply.

pvaldes β€’ Sep 12, 2017 β€’ View on HN

Is probably more a case of blinded by electric lights here.

ComputerGuru β€’ Aug 10, 2025 β€’ View on HN

Ahhh you’re not taking light pollution into account!

g-b-r β€’ Nov 23, 2025 β€’ View on HN

Someone needs to read about the effects of artificial lighting

jacoblyles β€’ May 10, 2010 β€’ View on HN

Except viewing in the sunlight.

NicoJuicy β€’ Mar 23, 2018 β€’ View on HN

If this is true, i wonder how much is attributed to the shortage of light when it's dark.

nebabyte β€’ Aug 15, 2017 β€’ View on HN

Many people aren't attuning it to outdoor light levels.

SketchySeaBeast β€’ Jul 30, 2024 β€’ View on HN

I am comfortable with saying that light keeps us from sleeping.

grishka β€’ Feb 28, 2022 β€’ View on HN

This assumes you have sunlight outside in the first place.