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Light at night not a ‘bright’ idea
Jerusalem Post ^ | 01/15/2012 | AVIGAYIL KADESH/NO CAMELS

Posted on 01/15/2012 1:28:24 PM PST by aimhigh

. . . .
The scientists investigated the effect of different types of outdoor lighting on light pollution and Melatonin, in order to suggest practical steps for balancing productivity, energy expenditure and public health.

White LED light (which is actually blue light on the spectrum) is emitted at short wavelengths of between 440-500 nanometers. The study showed that this type of light suppresses the body’s production of Melatonin five times more than the orange-yellow light given off by traditional high-pressure sodium (HPS) bulbs.

(Excerpt) Read more at jpost.com ...


TOPICS: Israel; Miscellaneous; News/Current Events
KEYWORDS: health; light
Have a light?
1 posted on 01/15/2012 1:28:25 PM PST by aimhigh
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To: aimhigh

Just this morning I referred to this problem on this thread about CFL’s.

http://www.freerepublic.com/focus/f-news/2833134/posts


2 posted on 01/15/2012 1:36:26 PM PST by JDW11235 (http://www.thirty-thousand.org/)
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To: aimhigh

I like it dark but I’m guessing I would feel differently if I lived in the city.


3 posted on 01/15/2012 1:37:32 PM PST by cripplecreek (Stand with courage or shut up and do as you're told.)
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To: aimhigh

I’ve seen gaudy billboards so bright, it’s a danger to those driving....Some are so bright in rural areas, the light dome emitted by these in your face trashy 4 story high advertisements can be seen 15 miles away.


4 posted on 01/15/2012 1:38:31 PM PST by dragnet2 (Diversion and evasion are tools of deceit)
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To: aimhigh
This is important stuff. The quality of the light from incandescent bulbs is superior to that from CFL bulbs. In normal times (i.e. where public policy wasn't driven by global warming hysteria); CFL bulbs would be banned, because of their inferior spectrum (to say nothing of the mercury they contain).

LEDs are a different story. The article is only half right on them. Yes, most ordinary white LEDs emit a blue light, within a narrow band of the spectrum. However, the article was comparing them to high-output outdoor lights. In those cases, a LED fixture can contain several different types of LEDs. It is possible to tune the light to just about any hue desired.

5 posted on 01/15/2012 1:41:55 PM PST by USFRIENDINVICTORIA
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To: aimhigh

Any light at night is a problem, amd I’m sorry to hear LED lighting is worse.

There is a conection between vitamin D levels, melatonin, light at night, not enough sunlight and many cancers. We most likely have so many breast and colon cancers, among others, because we have electric lighting and reduced sun exposure.


6 posted on 01/15/2012 1:42:45 PM PST by Williams (Honey Badger Don't Care)
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To: dragnet2
I completely agree with you — those things are dangerous. Recently, giant-screen plasma (or perhaps LED) TV screens have been popping up around here, as outdoor advertising signs. They are bright, which is bad enough. They can also be highly distracting (the don't have static displays).
7 posted on 01/15/2012 1:47:47 PM PST by USFRIENDINVICTORIA
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To: Williams

I can see a possible connection with skin cancer and brain disorders. The other cancers, I can’t see a connection. My wife (a colon cancer survivor) thinks it’s due to all the EMF energy whizzing through the air (and us). She’s currently battling lymphoma. So many electronic gadgets and transmitters in this day and age, we don’t worry so much about LED output.


8 posted on 01/15/2012 1:56:19 PM PST by roadcat
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To: aimhigh

“light pollution” my eye.

That’s what the comfy folks in safe suburbs refer to what we in ordinary neighborhoods consider necessary precautions.


9 posted on 01/15/2012 2:04:16 PM PST by BenLurkin (This is not a statement of fact. It is either opinion or satire; or both)
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To: roadcat

Certainly I don’t know the answer and wish your wife well. Breast cancer (my wife is a survivor) is a cancer of developed countries, they don’t have it as we do in the Third World.

Theory is lighting at night reduces melatonin production. Night shift workers have higher breast and colon cancer rates.

Also I think Vitamin D is the one supplement that is not hype, vitamin D supplements do seem to reduce cancer rates.

My grandfather had lymphoma at an advanced age they were able to control it for many years, I hope your wife does well.


10 posted on 01/15/2012 2:28:50 PM PST by Williams (Honey Badger Don't Care)
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To: BenLurkin

Alternatively, it is folks pointing out to you that it is possible to have light without shining it into the sky (where you don’t need it).


11 posted on 01/15/2012 2:46:22 PM PST by 1rudeboy
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To: aimhigh

Ban the night time consumption of electricity!
Only the government is responsible enough to use electricity at night.
Those who truly have a need for electric power after dark should be required to prove their requirement and apply for a government electric power use permit.
Do it for the children! Please!


12 posted on 01/15/2012 2:51:45 PM PST by MrBambaLaMamba (This Message Contains Privileged Attorney-Client Communications)
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To: Williams
My grandfather had lymphoma at an advanced age they were able to control it for many years, I hope your wife does well.

Thank you for your kind words. She is in partial remission. When a growth flares up, she goes into treatment. Been going on for five years now, after her surgery and treatment for the colon cancer. One thing that would give creedence to your theory about lighting causing cancer, is that my wife was a manager of a computer lab - a whole floor deep under a skyscraper with all artificial lighting, no windows. She spent long hours there every day for years starting at 6 a.m., and got little natural sunlight. However, she was also exposed to lots of EMF from the lab equipment. I just wish there was a cure.

13 posted on 01/15/2012 3:12:43 PM PST by roadcat
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To: roadcat
The solution the left craves:


14 posted on 01/15/2012 3:29:35 PM PST by null and void (Day 1089 of America's ObamaVacation from reality [Heroes aren't made, Frank, they're cornered...])
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To: aimhigh
"...the bright blessed day, the dark sacred night..."

There's a place for both.

15 posted on 01/15/2012 3:36:56 PM PST by americanophile ("this absurd theology of an immoral Bedouin, is a rotting corpse which poisons our lives" - Ataturk)
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To: aimhigh

Some car headlights blind me when I am driving at night. I see them mostly on BMW’s and Mercedes and other expensive cars, I guess they are LED lights. The light is blue white and I can’t stand them!


16 posted on 01/15/2012 3:44:20 PM PST by Ditter
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To: aimhigh

This explains why the North Koreans have such a long life expectancy. < /sarc>


17 posted on 01/15/2012 3:46:58 PM PST by gitmo (Hatred of those who think differently is the left's unifying principle.-Ralph Peters NY Post)
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To: BenLurkin

I didn’t follow your post. What do you consider an “ordinary neighborhood”.


18 posted on 01/15/2012 3:50:17 PM PST by gitmo (Hatred of those who think differently is the left's unifying principle.-Ralph Peters NY Post)
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To: All

I smell a rat, first of all natural day light has a color temperature of 6500k compared to 27ook for incandescent bulbs and even lower for sodium. SO we are adapted for the 6500K color temp.


19 posted on 01/15/2012 3:50:17 PM PST by wattojawa (Caution: socialism may be hazardous to your wealth)
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To: aimhigh

I was in the lighting business for a short time.

Personally, I DETEST high pressure sodium lamps.

Ugly, energy gobbling, yellow light. I pity people that have to work in warehouses and factories with HPS lighting.


20 posted on 01/15/2012 3:52:32 PM PST by 2111USMC (Not a hard man to track. Leaves dead men wherever he goes.)
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To: wattojawa

so it is more like natural light and that is why it could cause sleep issues for some people but the answer for them is simple just make sure the bed room is dark and to those of you who hate the cool white light and prefer warm white. this is supposed to be a free marked let those that want cool white have it.


21 posted on 01/15/2012 3:56:09 PM PST by wattojawa (Caution: socialism may be hazardous to your wealth)
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22 posted on 01/15/2012 3:56:15 PM PST by RedMDer (Forward With Confidence!)
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To: 2111USMC

I hate it as well in most cases, give me the cool blue light of leds, it makes me feel more awake.


23 posted on 01/15/2012 4:02:44 PM PST by wattojawa (Caution: socialism may be hazardous to your wealth)
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To: AdmSmith; AnonymousConservative; Berosus; bigheadfred; Bockscar; ColdOne; Convert from ECUSA; ...

Thanks aimhigh.
White LED light (which is actually blue light on the spectrum) is emitted at short wavelengths of between 440-500 nanometers. The study showed that this type of light suppresses the body’s production of Melatonin five times more than the orange-yellow light given off by traditional high-pressure sodium (HPS) bulbs.
Who's the treehuggers now?


24 posted on 01/15/2012 4:09:36 PM PST by SunkenCiv (FReep this FReepathon!)
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To: wattojawa
I had a number of projects where we replaced the HPS fixtures with 8-lamp T8 fluorescent fixtures using a 5000K color temp lamp.

458 watts per HPS fixture versus 210 watts per fluorescent fixture. The energy savings alone would usually provide a “payback” of less than one year to do the retrofit.

It made the plants look brighter and cleaner and the employees absolutely loved it.

25 posted on 01/15/2012 4:22:38 PM PST by 2111USMC (Not a hard man to track. Leaves dead men wherever he goes.)
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To: cripplecreek

I like the dark too. Used to live out in the sticks (loved it) it never ceased to amaze me. City people move out into the country to get away and the first thing the do is to erect their own street light!


26 posted on 01/15/2012 5:15:35 PM PST by Dawggie
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To: Dawggie
Even before we retired to the home we bought adjoining my part of the old family farm, the first thing I did was call the electric co-op and have them install a cutoff switch on the pole security light.

For one thing, I like astronomy, particularly watching meteor showers...

27 posted on 01/15/2012 6:33:30 PM PST by TXnMA ("Allah": Satan's current alias...)
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To: Ditter

I drive a Mercedes. It’s the lights on the Lamborghinis and Bentleys that bother me!


28 posted on 01/15/2012 10:26:14 PM PST by Atlas Sneezed (Author of BullionBible.com - Makes You a Precious Metal Expert, Guaranteed.)
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To: Beelzebubba
When I drive my Bentley my lights don't bother me at all.
29 posted on 01/16/2012 7:18:53 AM PST by Ditter
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