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LED Street Lamp Improvement

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#1 Tony Cifani

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Posted 09 August 2024 - 10:51 AM

Many months ago, I called my city to request a lamp shield or wattage reduction on a very bright and obtrusive LED street lamp across the street from my house. After many phone calls to the city and then the power company, this finally happened, and the difference is amazing. The light was so bright, I could easily see color in grass and foliage in my front yard and read small type on printed materials like star maps. My main argument to the city and power company was not to practice astronomy but lack of sleep because the light spilled into my bedroom. They agreed with me on this and did not try to argue.

 

Now, my front yard which is where I often set up a telescope, is substantially darker and more importantly the blinding spot light effect is gone which greatly helps my ability to adapt to the darkness. The pool of light now isolated mostly to the street is also considerably dimmer, so they may have installed a shield and a lower wattage lamp. I'm not completely sure about the lamp itself, but they did install this black plastic device over the lamp housing which blocks most of the stray light.

 

Once I have a good clear night, I'll take some photos to show the difference with this modified lamp. 

 

It took a long time for this to happen, but persistence has paid off.

 

Clear skies!

 

Tony

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#2 auroraTDunn

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Posted 09 August 2024 - 11:29 AM

BRAVO and congrats!

Now lets hope entire cities (coughDenvercough) would take note of this and take action!


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#3 bunyon

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Posted 09 August 2024 - 03:05 PM

I have the exact same story. The shield doesn't look like much, but it does a great job.


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#4 Tony Cifani

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Posted 10 August 2024 - 08:54 PM

Here's a photographic comparison from recent years from my front yard. The first image from 2020 with sodium vapor lamp. Center image with the new bright LED installed 2023. Image at right modified or shielded LED lamp 2024.

 

All images photographed with the same camera and lens (Canon 5D MK4 w/ 24-70 F/2.8 @ 24mm) and exact same exposure settings on manual mode: F/2.8, 8 sec. ISO 160. (camera on tripod). 

 

I didn't nail the exact framing of each shot from one year to the next, but notice difference in brightness of lamp as well as surrounding trees and foliage. Also interesting to note differences in sky glow in shots.

 

Even though the new shielded street lamp is still obvious, brightness has been greatly reduced. And while my bright urban skies are still approximately 18.5 mpsas, I am now able to enjoy visual observation again, at least brighter showpiece objects.

 

If you have a problem in your neighborhood with streetlights like this, contact your city and/or your power company. They might be willing to install a shield.

 

 

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#5 DSOGabe

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Posted 12 August 2024 - 12:46 PM

Congratulations on the victory.

Have read on previous posts that bringing astronomy into the argument usually ends in failure. The focus needs to be on sleep being disturbed by the lighting for the municipality or power company to actually do something. 


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#6 kevin6876

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Posted 14 August 2024 - 10:40 PM

Little victories are sweet.  Congrats on the shield install!


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#7 christianphillips

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Posted 14 May 2025 - 06:38 AM

I switched my outdoor LED with a warmer color temp and added light shielding—it made a big difference. For indoor stuff, I found a good Wandleuchte für Innenräume that doesn’t spill much light outside and still looks nice. I was also surprised how a small tweak like angling the fixture down more helped cut skyglow a lot in my yard.



#8 alanpo

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Posted 14 May 2025 - 09:07 AM

Never seen, thought of a shield like this. Nor that something like this would be effective. The entire Tampa Bay region uses the cheapest whitest brightest most light scattering lights. Probably 15% turn purple in a few years because they are defective. Duke Energy gives them the great deals on the replacements from the sodium lights. On my cities' side streets though, they use smaller rounder leds that scatter the light unevenly and couldn't use a shield like this. I had them put a shield on the light nearest my house and it was a traditional shield and didn't help us much if any, and I gave up.


Edited by alanpo, 14 May 2025 - 09:08 AM.


#9 Don W

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Posted 14 May 2025 - 11:52 AM

We have something like 14 designated dark sky areas in Arizona including where I live in the Sedona/Cottonwood area. Driving towards this area from the south is very eerie. From 15 miles or so away all you see is a very low glow on the horizon.




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