Author Topic: What is the worst light pollution source?  (Read 414 times)

hoidingsikva

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Re: What is the worst light pollution source?
« Reply #30 on: January 31, 2018, 02:06:22 AM »
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The worst is the mercury and sodium vapor street lights,next is architectural and advertising. It would be nice to have laws that turn off the advertising and lit up buildings atsay midnight every night. Ialways marvel at the huge lighted parking lots thatstay lit all night after businesses close and the lots sit empty. We are not really serious about saving energy yet.

At least Mercury and Sodium vapor lights can be filtered out. My concern is that full spectrum LED lights will replace older lights and with the lower wattage, cities will seek to erase the last star from the skies with the energy savings.

This is exactly why outdoor lighting needs a standard to preserve dark skies and reduce light pollution.

nasapehe

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Re: What is the worst light pollution source?
« Reply #31 on: January 31, 2018, 08:02:07 AM »
Just a few miles away is car dealer mile. Those guys have flood lights that could be visible from orbit. The other one is a prison. We may be able to get the car dealerships under control eventually as they have to replace fixtures, but not the prison. It's exempt.

Dan Square

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Re: What is the worst light pollution source?
« Reply #32 on: January 31, 2018, 01:36:14 PM »
The darkest place that is not extremely creepy and is easily accessible is my side yard, where my house blocks the southern sky to about +10° at the medrian. There is still one street light visible, but it's through trees. My normal site is bathed with light, though.

Jason Kaltwasser

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Re: What is the worst light pollution source?
« Reply #33 on: February 02, 2018, 04:12:58 PM »
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Just a few miles away is car dealer mile. Those guys have flood lights that could be visible from orbit. The other one is a prison. We may be able to get the car dealerships under control eventually as they have to replace fixtures, but not the prison. It's exempt.
The prison built in Springfield, Vermont, a few miles from the site of the Stellafane star party, was subject to an intensive light-pollution study. Careful before-and-after measurements show that it has contributed very little to the light pollution at Stellafane.

highdabbkofi

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Re: What is the worst light pollution source?
« Reply #34 on: February 03, 2018, 03:46:18 AM »
I thank god for the very dry Great Basin. The high desert is mostly empty of people and even agriculture in the driest places. The middle/northern parts of Nevada have moderate temperatures even in the summer months as long as you stay away from elevations below about 5500 feet. Some of these areas will never be developed. BLM land is perfect for getting away from everything. Be sure that you are prepared for any problems because the darkest areas don't have cell phone service. The safest way is to go with friends driving a 2nd vehicle in case one breaks down. Once you get about 90 miles away from cities and town it is truly dark.

esicnatka

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Re: What is the worst light pollution source?
« Reply #35 on: February 03, 2018, 06:30:41 AM »
What does BML stand for?

belmadeasus

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Re: What is the worst light pollution source?
« Reply #36 on: February 03, 2018, 07:15:18 AM »
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What does BML stand for?
Buy More Lemons.

Michael Shen

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Re: What is the worst light pollution source?
« Reply #37 on: February 09, 2018, 04:56:50 AM »
I guess you were asking about "BLM," not "BML." It stands for Bureau of Land Management (land controlled by the federal government but not a national park or forest nor a military reservation).

alinvibee

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Re: What is the worst light pollution source?
« Reply #38 on: February 09, 2018, 05:38:35 AM »
OK, thanks! I forgot about that agency. The letters simply did not ring a bell for me.

nasapehe

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Re: What is the worst light pollution source?
« Reply #39 on: February 09, 2018, 07:58:59 AM »
In Nevada the federal government controls about 85% of the total land. The BLM land is the vast majority of Nevada. We have also have Great Basin National Park and a lot of national forest land and military reservations.