Skip to comments.Light at night not a ‘bright’ idea
Posted on 01/15/2012 1:28:24 PM PST by aimhigh
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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 bodys 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 ...
Just this morning I referred to this problem on this thread about CFL’s.
I like it dark but I’m guessing I would feel differently if I lived in the city.
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.
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.
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.
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.
“light pollution” my eye.
That’s what the comfy folks in safe suburbs refer to what we in ordinary neighborhoods consider necessary precautions.
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.
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).
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!
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.
There's a place for both.
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!
This explains why the North Koreans have such a long life expectancy. < /sarc>
I didn’t follow your post. What do you consider an “ordinary neighborhood”.
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.
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.
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.
I hate it as well in most cases, give me the cool blue light of leds, it makes me feel more awake.
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 bodyâs 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?
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.
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!
For one thing, I like astronomy, particularly watching meteor showers...
I drive a Mercedes. It’s the lights on the Lamborghinis and Bentleys that bother me!