tech

Energy-saving LEDs boost light pollution worldwide

9 Comments
By Kerry SHERIDAN

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© 2017 AFP

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9 Comments
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And now we even light up natural features line waterfalls, trees and cliffs. Illumination. A huge pet peeve of mine

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"dire consequences - raise the risks of cancer, diabetes and depression.

Really?

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This article is pulled from a French Publication. Please take in to account this is not written by an Ex-Pat who lives in Japan. I am a native Japanese. This is my first post on JapanToday’s forum. Please forgive me for my forwardness.

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Genki Simon, welcome to JT, and you will discover that there are people from all over the world who post here, including some native Japanese living here in Japan or for example in the USA. Thank you for pointing out the origin of this article, AFP, written by Kerry Sheridan in Miami.

You are not forward and there is nothing to forgive. Carve out a comfortable place on JT, and go for it!  ;-)

Regarding LEDs, the message about "blue/violet = bad" and "amber = better" was interesting for me, especially as I have just fitted super bright LED headlights to my car at great expense.

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Make a home experiment: put your hand under a led lamp. You will feel that despite the bulb is not warm, the light it emits does make your skin feel hot. It emits UV rays. I wonder what damage led lights can cause in the long run to environment and people,

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You will feel that despite the bulb is not warm, the light it emits does make your skin feel hot. It emits UV rays.

That's not what I've been led to understand (pun unintended). I though domestic LED lights generally emit little UV radiation compared to incandescent bulbs. This is sometimes claimed as a reason they attracts fewer insects, although this seems to be disputed.

In your experiment, is the heat you feel not from the heat that accumulates in the electrical contact area of the bulb? While the glass of LED bulbs can remain cool, depending on the type, the contacts can get very hot. Basically any electric device generates heat. With LED lights it's relatively less because less electricity is needed to power them.

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Light pollution is becoming all pervasive, I live out in the country, yet I can walk home from the pub just by the reflected light of the nearest town.

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Sad to hear this, recall walking back to our weekend house at night in the countryside only by moon and starlight was plenty bright enough, when we headed back tonight capital the light come was visible from far away.

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And if we didn't have LED lights, would the outcome be any different ?

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