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Energy-efficient streetlights may change color of light pollution

National Geographic -- The night sky may glow bluer as yellow-orange streetlights are gradually replaced by whiter, energy-saving lights, a new study says.

Light-emitting diodes, or LEDs, cast a bluish glow in the sky and are about 20 percent more efficient than industry-standard streetlamps, that generate red-colored light pollution.

With LED efficiency expected to double to 40 percent in a few years, it's inevitable that governments worldwide will opt to save energy by switching to LEDs, which also last longer and require less maintenance.

"The likely worldwide transition to increased LED street lighting may have an effect on research topics as diverse" as disruptions of animals' circadian rhythms and air pollution, the study authors write.

For the study, the researchers built an inexpensive device


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Submitted Aug 20, 2012 By: Martinman
Category: Daily News Article Discussions > Topics Add to favorite topics  
Author Topic: Energy-efficient streetlights may change color of light pollution Back to Topics
REPLIES (newest first) Post a Reply
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honda0105
Champion Author Tallahassee

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Message Posted: Aug 24, 2012 5:08:24 AM

as long as things don't change too badly or we might not be able to identify the crook's clothing colors after a crime.
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honda0105
Champion Author Tallahassee

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Message Posted: Aug 23, 2012 5:01:38 AM

thanks for posting. Arizona has already done it. Though it's to help the astronomers who flock there for clean air to do some good research, it's still a good idea to reduce light pollution.
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LetemEatCake
Champion Author Oklahoma City

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Message Posted: Aug 22, 2012 11:17:29 PM


Good article Martin....interesting!
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sparky808
Champion Author Honolulu

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Message Posted: Aug 22, 2012 12:29:26 PM

Thank you for posting.
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sparky808
Champion Author Honolulu

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Message Posted: Aug 21, 2012 12:27:22 PM

Price of progress.
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nickatnite
Veteran Author Indianapolis

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Message Posted: Aug 21, 2012 12:22:19 PM

More energy-efficient lighting is always the way to go.
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bonzoonfmb
Champion Author Florida

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Message Posted: Aug 20, 2012 11:09:01 PM

I don't know about this, different cities have different color of streelights - some sodium-vapor some mercury vapor. The switch to LEDs should be made when cost effective.
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kgbellman
Champion Author Ann Arbor

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Message Posted: Aug 20, 2012 11:07:51 PM

I'm glad as I prefer the more true white light and have never liked the yellowish light. Interesting study that should continue.
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shores4now
Champion Author Kentucky

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Message Posted: Aug 20, 2012 11:07:47 PM

Ok
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Ahking
Champion Author Orange County

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Message Posted: Aug 20, 2012 11:06:15 PM

hope the sea turtles survive the LED.
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wcp3rd
All-Star Author New Jersey

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Message Posted: Aug 20, 2012 11:04:46 PM

ok
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Godozo
Champion Author Gary

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Message Posted: Aug 20, 2012 11:00:14 PM

Wonder what will happen when/if they figure out how to make a yellower light from the LEDs. Blue lights at night affect my ability to drive, have less of a problem with green or pinkish lights.
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wcp3rd
All-Star Author New Jersey

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Message Posted: Aug 20, 2012 10:58:56 PM

ok
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Mikeyl
Champion Author Cleveland

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Message Posted: Aug 20, 2012 10:57:52 PM

I hate sodium-vapor now. I like the silvery glow of LEDs much better.
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txrojo2005
Champion Author Austin

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Message Posted: Aug 20, 2012 10:57:30 PM

Unintended consequences.
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crazycow2332
Champion Author Nashville

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Message Posted: Aug 20, 2012 10:57:27 PM

ok
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petrpuck
All-Star Author Hamilton

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Message Posted: Aug 20, 2012 10:54:21 PM

yea.....that
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DandyDapple
All-Star Author North Dakota

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Message Posted: Aug 20, 2012 10:54:00 PM

...
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kgbellman
Champion Author Ann Arbor

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Message Posted: Aug 20, 2012 10:51:54 PM

I'm glad as I preferthe more true white light and have never liked the yellowish light. Interesting study that should continue.
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Tekkersmom57
Champion Author Syracuse

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Message Posted: Aug 20, 2012 10:51:13 PM

If LED's come down in price, more people will definitely be using them.
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must87searcher
Champion Author Maryland

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Message Posted: Aug 20, 2012 10:50:06 PM

I have some LED flashlights and they sure do produce a lot of light. My monitor is also and LED and it is brighter and uses less electricity compared to a tube or LCD monitor. The idea of using LED lights may work.
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msienkiewicz
Champion Author Maryland

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Message Posted: Aug 20, 2012 10:49:49 PM

My circadian rhythms could use some adjustment. Maybe I will see if I can change the CFL in the coach lamp in front of my house with a bluer shaded LED... that light coming in the window at night can be a bit annoying.
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itsjustme719
Champion Author Hamilton

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Message Posted: Aug 20, 2012 10:49:39 PM

Okay.
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MJIOWA
Champion Author Iowa

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Message Posted: Aug 20, 2012 10:48:54 PM

cool
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sammy518
Champion Author Austin

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Message Posted: Aug 20, 2012 10:43:05 PM

Austin was known as the "Violet Crown" because of the moon towers that were placed all over the city decades ago. from a long distance across TX you'd see the violet glow!
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OOXXFF
Champion Author Greensboro

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Message Posted: Aug 20, 2012 10:40:38 PM

Good news, I think.
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honkerman
Champion Author San Jose

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Message Posted: Aug 20, 2012 10:37:35 PM

O.K.
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5kvdave
All-Star Author Los Angeles

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Message Posted: Aug 20, 2012 10:36:49 PM

MORE B.S.!!!!!!!
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NemoIL
Champion Author Illinois

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Message Posted: Aug 20, 2012 10:34:32 PM

Good I hate the orange ones.
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pgerassi
Champion Author Milwaukee

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Message Posted: Aug 20, 2012 10:33:22 PM

Glare problems are color ignorant. Blue lights can cause more glare than reddish ones if thew latter are aimed properly and the former not.
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40niner
Champion Author Winnipeg

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Message Posted: Aug 20, 2012 10:32:42 PM

It makes no difference here, these street lights are on 24/7; you can phone to complain, they don't do a thing about lights burning all day. Here, these street lights burn and no civic elected person bothers to get them shut off. So energy-efficient or not, what we really need is energy-efficient employees.
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mrbee
Champion Author Little Rock

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Message Posted: Aug 20, 2012 10:32:00 PM

Until they find something better.

[Edited by: mrbee at 8/20/2012 11:32:38 PM EST]
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Buddy2264
Champion Author Tampa

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Message Posted: Aug 20, 2012 10:31:35 PM

With all the savings will we see a reduction in electricity costs? I think not. I should have installed solar long ago, by now it would have paid for itself.
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landsart
Rookie Author San Diego

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Message Posted: Aug 20, 2012 10:30:24 PM

OK Then !
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toadNY
Champion Author Albany

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Message Posted: Aug 20, 2012 10:29:45 PM

What next?
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listerone
Champion Author Boston

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Message Posted: Aug 20, 2012 10:28:53 PM

So what?
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mcmonsta
Champion Author Honolulu

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Message Posted: Aug 20, 2012 10:26:51 PM

if it makes sense then most gov'ts will take forever to make the move!
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dlemma
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Message Posted: Aug 20, 2012 10:26:11 PM

gas prices???
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wayoung56
Champion Author Alabama

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Message Posted: Aug 20, 2012 10:25:43 PM

Red light is good because it helps preserve your night vision. I was on nuclear submarines when I was in the Navy and they always rigged the control room for red lights or the OOD wore red goggles during the night watch hours to make sure they had good night vision if they had to look out the pericope.

So when we go from an area with the new "bluer" LED lights to a darker area our night vision will possibly be wiped out for several minutes...
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grn7stars
Rookie Author Washington

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Message Posted: Aug 20, 2012 10:25:10 PM

k
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BoerneWatch
Champion Author San Antonio

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Message Posted: Aug 20, 2012 10:23:17 PM

We have those now and they do put out more of a blueish light.
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abcdMA
Champion Author Worcester

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Message Posted: Aug 20, 2012 10:22:35 PM

now we can have blue lightlight pollution---is that a blue light special?
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FunMyster
All-Star Author Indiana

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Message Posted: Aug 20, 2012 10:20:35 PM

ok
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Jmac2008
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Message Posted: Aug 20, 2012 10:20:13 PM

ok
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mstearno
Champion Author Dayton

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Message Posted: Aug 20, 2012 10:18:09 PM

gas prices?
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Yankee829
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Message Posted: Aug 20, 2012 10:12:11 PM

Ok
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humancry
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Message Posted: Aug 20, 2012 10:10:10 PM

ok
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Cableman66
Champion Author North Carolina

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Message Posted: Aug 20, 2012 10:07:41 PM

Moving from lighted to unlighted areas with these so called bright lights will be a safety issue. How long will it take you to adjust to the changes and what will it do to your reaction time driving at night.
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danreino
Champion Author Twin Cities

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Message Posted: Aug 20, 2012 10:05:59 PM

have a holly jolly christmas....in the jungle
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serrog
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Message Posted: Aug 20, 2012 10:04:00 PM

amazing
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