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View Poll Results: What's your opinion of LED streetlights?
Yeah 18 62.07%
Meh 3 10.34%
Nah 8 27.59%
Voters: 29. You may not vote on this poll

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Old 05-08-2019, 04:16 AM
 
5,757 posts, read 3,239,310 times
Reputation: 5176

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If they used LEDs with a color temperature of 2200K it would look similar to HPS. I have 2200-2300K bulbs throughout my home.
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Old 05-08-2019, 05:12 AM
 
Location: San Antonio/Houston
37,046 posts, read 54,797,884 times
Reputation: 88041
There are pros and cons to consider:
Pros

Reduces energy costs.
Could lower light pollution.
Need to be replaced less often.
A more pleasant light, to some.

Cons

Blue light could suppress melatonin production.
Blue light could disrupt animals’ habits.
Glare could bother drivers.
Brightness is irritating, to some.
Eco-friendly LED lights may damage your eyes, according to new research. A study has discovered that exposure to LED lights can cause irreparable harm to the retina of the human eye. Blue LEDs is disrupting circadian rhythms and for possibly causing brain damage.

In many instances simply retrofitting new LED heads on old columns was often a bad idea, because the spacings aren’t right for the characteristics of LEDs.

Interesting article about the LED color:
https://www.manufacturer.lighting/info/73/
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Old 05-08-2019, 05:36 AM
 
Location: Crook County, Illinois
3,396 posts, read 1,518,582 times
Reputation: 4232
Quote:
Originally Posted by markjames68 View Post
If they used LEDs with a color temperature of 2200K it would look similar to HPS. I have 2200-2300K bulbs throughout my home.
I wonder why don't they? The technology exists, and an amber glow is a better spectrum for night lighting.
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Old 05-08-2019, 09:36 AM
 
1,887 posts, read 2,923,989 times
Reputation: 2398
Quote:
Originally Posted by MillennialUrbanist View Post
LED streetlights are popping up left and right in my neck of the woods everywhere: in Chicago proper, in suburbs, and on state-owned expressways. I don't know about most people, but I don't like them. Yeah, they have merits, like saving energy, but in my opinion, not much else. First off, instead of having a warm amber glow that boosts my mood a little at night, they shine in a harsh, stark light that reminds me of a hospital operating room. Second, they have very strong glare, and they blind me momentarily if I accidentally look up at at them; that can't be good for driving safety. Third, I read that they cause worse light pollution than high-pressure sodium (amber) streetlights do, even if they save energy. And they can disrupt sleep for nighttime drivers (after they get home, that is), since any light with blue wavelengths tricks the brain into thinking it's morning.

So what do others think, as far as LED streetlights are concerned? Yeah, meh, or nah?
I say we go back to the oil lamps they were using in the early 1900's! They were warmer, comforting and classy. My investments in oil companies has no bearing on this comment.

SS
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Old 05-08-2019, 09:52 AM
 
Location: Crook County, Illinois
3,396 posts, read 1,518,582 times
Reputation: 4232
Quote:
Originally Posted by ShakenStirred View Post
I say we go back to the oil lamps they were using in the early 1900's! They were warmer, comforting and classy. My investments in oil companies has no bearing on this comment.
I know you were being facetious, but I really liked the gas lamps I saw in New Orleans. It was mostly front porch lights on people's houses. The houses were built with no setbacks, so the lights actually illuminated the sidewalks. I really liked the warm glow. Very comforting. Impractical, maybe, but damn, it looked nice. I vaguely recall seeing a few gas streetlights too, but I could be wrong.
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Old 05-08-2019, 03:38 PM
 
2,912 posts, read 729,592 times
Reputation: 3323
Quote:
Originally Posted by elnina View Post
There are pros and cons to consider:
Pros

Reduces energy costs.
Could lower light pollution.
Need to be replaced less often.
A more pleasant light, to some.

Cons

Blue light could suppress melatonin production.
Blue light could disrupt animalsí habits.
Glare could bother drivers.
Brightness is irritating, to some.
Eco-friendly LED lights may damage your eyes, according to new research. A study has discovered that exposure to LED lights can cause irreparable harm to the retina of the human eye. Blue LEDs is disrupting circadian rhythms and for possibly causing brain damage.

In many instances simply retrofitting new LED heads on old columns was often a bad idea, because the spacings arenít right for the characteristics of LEDs.

Interesting article about the LED color:
https://www.manufacturer.lighting/info/73/
This topic is about streetlights. I feel that I'm less concerned about circadian rhythm when I'm behind the wheel at night, and more concerned with staying alert and awake. Another concern is effectiveness of the streetlight's cast.

If cost weren't an issue, I'd be in full support of an HID-like xenon bulb behind a focus-able projector lens. Each light could be adjusted to spread or narrow, much like a Maglite beam. They could throw a lot of light, with a very narrow "you're blinded" zone. Maybe we can narrow this down to a zone where most vehicle roofs would be overhead by the time you're under it, it glare would be less of an issue for some drivers.

I understand there's a need to retain visibility ahead, just as much as there is to light the immediate area.
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Old 05-08-2019, 06:13 PM
 
Location: KY
270 posts, read 59,748 times
Reputation: 635
Best thing installed since shirt pockets IMO.
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Old 05-08-2019, 07:20 PM
 
Location: Eugene, Oregon
8,820 posts, read 2,837,710 times
Reputation: 12959
Quote:
Originally Posted by MillennialUrbanist View Post
LED streetlights are popping up left and right in my neck of the woods everywhere: in Chicago proper, in suburbs, and on state-owned expressways. I don't know about most people, but I don't like them. Yeah, they have merits, like saving energy, but in my opinion, not much else. First off, instead of having a warm amber glow that boosts my mood a little at night, they shine in a harsh, stark light that reminds me of a hospital operating room. Second, they have very strong glare, and they blind me momentarily if I accidentally look up at at them; that can't be good for driving safety. Third, I read that they cause worse light pollution than high-pressure sodium (amber) streetlights do, even if they save energy. And they can disrupt sleep for nighttime drivers (after they get home, that is), since any light with blue wavelengths tricks the brain into thinking it's morning.

So what do others think, as far as LED streetlights are concerned? Yeah, meh, or nah?

The LED lights show mostly true colors. The older amber lights distorted color completely. You couldn't accurately describe the color of a car under them, if you called the police. But the LED lights are much brighter. There was a dangerous problem of some drivers not turning on headlights, because the street lights gave enough illumination, that they didn't notice. So with the LED lights, this will undoubtedly become worse. There is a street light directly across from my driveway and when they replace it with an LED, it will be almost like daylight in front of my house, all night. When I relax in a lawn chair in my front yard on a warm summer night, I'll have to wear some clothes.
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Old 05-08-2019, 07:25 PM
 
Location: San Antonio/Houston
37,046 posts, read 54,797,884 times
Reputation: 88041
Quote:
Originally Posted by ddm2k View Post
This topic is about streetlights. I feel that I'm less concerned about circadian rhythm when I'm behind the wheel at night, and more concerned with staying alert and awake. Another concern is effectiveness of the streetlight's cast.

If cost weren't an issue, I'd be in full support of an HID-like xenon bulb behind a focus-able projector lens. Each light could be adjusted to spread or narrow, much like a Maglite beam. They could throw a lot of light, with a very narrow "you're blinded" zone. Maybe we can narrow this down to a zone where most vehicle roofs would be overhead by the time you're under it, it glare would be less of an issue for some drivers.

I understand there's a need to retain visibility ahead, just as much as there is to light the immediate area.
I think the main concern is the color temperature. So, why not install 2300-2500 bulbs and everyone will be happy? Still bright, still energy saving and long living, but more eye-friendly and somehow more pleasant to look at. The white/bluish light is weird to look at night. We don't need to make day of a night...
Proper spacing is also important. They shouldn't just replace bulbs in existing lamp posts. They are way to close to each other.
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Old 05-08-2019, 07:28 PM
 
Location: San Antonio/Houston
37,046 posts, read 54,797,884 times
Reputation: 88041
Quote:
Originally Posted by Steve McDonald View Post
When I relax in a lawn chair in my front yard on a warm summer night, I'll have to wear some clothes.
I think you should. Regardless...
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