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Posted by defrost 1 day ago

LEDs’ potential to save our night skies(spectrum.ieee.org)
237 points | 181 commentspage 3
redmaple892 1 day ago|
I read the entire article and am really glad the author took time to write this down and for OP for posting. I am so tired of poor (mostly outdoor) but also indoor lighting. I have felt crazy feeling that the so-called "better" LED's in parks and on paths have felt like less lighting. Unfortunately I think changing things (in the US) often requires proving harm...science and aesthetics don't seem to matter much at all many place.
lysace 1 day ago||
The writing style frustrated me immensely.

tl;dr: Cheap cool-white LEDs cut energy but worsened light pollution; warmer, dynamically dimmable LED fixtures/infra fix it but lower costs tend to win.

trollbridge 1 day ago||
Isn't it standard journalism? Instead of just giving us the conclusion we're supposed to think, they interview various people in the field and quote what those people think, and then let us draw our own conclusions.
lysace 1 day ago||
No, this is engagement-maxxing style journalism. Complete with the clickbait headline. It also spends almost no time on why the cheaper-but-dumber options win.

(Everything is relative. I expect more from IEEE than the NYP or the Daily Mail, as extreme examples.)

micromacrofoot 1 day ago||
depending on who you ask the cold lighting also magically stops crime
jacooper 1 day ago||
I would 100% rather have a truly bright and lively city at night than a visible night sky. More than half the year is in the winter ffs!
SuperNinKenDo 1 day ago|
I hate outdoor LED lights so much, I won't be surprised if a couple decades or centuries from now we discover that these things have been doing permanent damage to people's eyes. It's getting harder and more unpleasant to walk at night, I can't see and my eyes legitimately hurt every couple of minutes.
BLKNSLVR 1 day ago||
Does this trigger you: Modern car LED headlights

There doesn't appear to be any standard being followed (anymore?) on brightness or angle or height (or shape). A selection of them are easy to confuse with high beams. Makes driving at night in the rain some kind of epilepsy inducing overwhelm of lights and reflections and lens flare coming from everywhere, reminiscent of the cyberpunk aesthetic.

trollbridge 1 day ago|||
In the U.S., the DOT sets standards, but they only apply to new vehicles sold. Aftermarket lights can be just about anything. (Some are labelled "not for highway use", as if that prevents them from being used on public roadways.)

Certain types of people seem to think they should install really, really bright LED lights in their car and then aim them right at other driver's eyes. I believe this comes from a mindset where one is unable to put one's self in another person's aspect, or where one simply doesn't care about others.

dec0dedab0de 1 day ago||
I hated these so much until I got a car with a tinted rear windshield, and a self-dimming mirror.
trollbridge 22 hours ago||
Or get the orange driving glasses.
alt227 1 day ago|||
At least in the UK this is being looked into by a government review.

Whether that will amount to anything or not remains to be seen, but at least the issue is being taken seriously.

https://www.bbc.co.uk/news/articles/cn971jlpvvro

BoxOfRain 1 day ago||
I miss the night looking like night, the ultra-harsh white LEDs used in street lights are trying to mimic daylight which is the last thing you want to do at night in my opinion. The old sodium lights might have had unnatural colour rendering (or in the case of low-pressure entirely monochromatic amber) but this was a small price to pay for warm outdoor lighting. There's no reason SOX and SON bulbs can't be approximated more efficiently with LEDs, we could have the economic benefits of LEDs without the horrible side-effects of cheap and nasty ones.

I'm not sure where a previously sensible industry decided ultra-harsh daylight bulbs were warranted literally everywhere, in the past harsh white halide bulbs coexisted with sodium ones for decades and there was always guidance on when to use gentle sodium versus harsh halide lights. Apparently everything needs to be as harsh as possible these days, damn the institutional knowledge. I'm not anti-LED but I'm anti-'lots of blue spectral content at night' regardless of the source.

adrian_b 1 day ago||
I completely agree.

I am very happy with my indoor LED lamps, but outdoors wherever the sodium-vapor lamps have been replaced I hate their replacements.

While replacing high-pressure sodium lamps with LEDs brings a somewhat better energy efficiency, the low-pressure sodium lamps already had a similar energy efficiency.