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June 02, 2020, 05:08:02 am
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Author Topic: Better Streetlights for Tulsa  (Read 253999 times)
patric
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« Reply #480 on: December 23, 2019, 01:13:52 pm »

In 2009 Tulsa stopped adding new streetlights due to increased expense and lack of evidence of any crime reduction. Ten years later all that has changed is increased fear-mongering from those seeking corporate welfare at taxpayer expense.
Areas with existing streetlighting, like the Blue Dome and Cheery Street, got newer, more efficient low-glare lighting by looking outside of PSO's energy-wasting inventory. Now we are preparing to take a big step backward.

Keep in mind that there is also no law requiring a city to have streetlights, mainly because every installation of a street light incurs liability if the bulb burns out and someone claims an injury as a result.  https://caselaw.findlaw.com/ca-court-of-appeal/1129807.html


City of Tulsa Preparing to Start Work in Neighborhood Street Light Initiative

' The City of Tulsa’s streets and stormwater department is getting ready to start in on a three-year-plan to add neighborhood street lights.

The city’s current budget included $25,000 for the work, which is intended to whittle down a backlog of requests that built up during a 10-year moratorium on new lights. The funds will go toward PSO’s installation work. The utility owns and maintains street lights in the city, which the city pays a fee for.

"For roundabout numbers, about $10 per month, so $120 a year per light, that gets us 150 foot of wire, a pole and a light fixture. If there’s not an available electric source close to that, then we have to pay whatever costs – if they have to set additional poles, if there’s a transformer needed," said Streets and Stormwater Director Terry Ball.

Ball's department and the Tulsa Planning Office are using a scoring system to prioritize the list of requests, with half the weight given to safety considerations.

"A lot of the requests in the past we got were people that had crime happening in their neighborhoods and felt like if they could get a street light added, that would help at least deter people," Ball said.

The concentration of car crashes involving bicycles and pedestrians are also considered in the safety portion of the score. '



There are a number of problems with this. First, the plan isnt to use newer energy-efficient lights but rather the same glare-prone junk lights from the 1970's (commonly called "farm lights").  The current state-of-the-art is warm white shielded LED that closely resembles incandescent light. This is not to be confused with earlier LEDs that have a distinct blue cast and have been recognized by the AMA as a risk to human health. https://physicstoday.scitation.org/do/10.1063/PT.5.1079/full/

Second, the program only budgets installation cost and not the cost of electricity in perpetuity. What schools will we close to pay the power bill further down the road?

Third, streetlights have not been shown to have a positive effect on crime, according to independent studies. Utility-funded studies, on the other hand, claim otherwise without offering evidence. https://kinder.rice.edu/sites/g/files/bxs1676/f/documents/Kinder%20Streetlights%20and%20Crime%20report.pdf

Fourth, concentrations of car crashes involving bicycles and pedestrians have been linked to the presence of disabling glare from commercial high-intensity lighting -- glare so intense it overwhelms your ability to see at night even when streetlights are present.  There are zoning laws against that, maybe we should be enforcing them?
http://tulsaplanning.org/plans/TulsaZoningCode.pdf (chapter 67)

https://www.wsj.com/articles/as-led-streetlights-spread-some-critics-look-for-dimmer-switch-1473818463

“So we consider this a new program. It’s almost like our speed hump program … it will be citizen-generated.”
Last year the city installed speed humps in the Bryn Mawr neighborhood without consulting the residents that would actually be affected by drivers circumventing the humps, so thats not a good example to follow.

"(Streetlight requests) must then be approved by at least three of the four property owners adjacent to the property where the light would be installed, Ball said."
There needs to be consideration for affected properties more than just one house away, since the glare and "light trespass" is worse at low angles. Objections should be counted, not ignored, as they would likely lead to lawsuits and claims against the city.
 
https://www.tulsaworld.com/news/local/government-and-politics/neighborhoods-will-get-more-street-lights-under-new-city-program/article_07746bc3-46b0-5fa3-8e99-43f906461592.html
« Last Edit: December 23, 2019, 01:16:30 pm by patric » Logged

"Tulsa will lay off police and firemen before we will cut back on unnecessarily wasteful streetlights."  -- March 18, 2009 TulsaNow Forum
patric
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« Reply #481 on: December 26, 2019, 11:06:32 am »

TULSA, Oklahoma - Carolyn Richards' family has owned a house near Pine and Lewis for more than 60 years, and they've never had a street light in front of it.

"It's so dark, you can't see," said Richards.

All that is about to change as the city has prioritized their street, Atlanta Avenue, as one of 137 to get a brand-new street light.
The installation is part of a new program by the City of Tulsa.

During the time period when they didn't have the money, Director of Streets and Stormwater Terry Ball and his team, put the requests into a spreadsheet and ranked them on a priority system based on crime, hazards and nearby uses.

Richards said she hopes the new light will deter thefts she's seen recently on the street.
If you want a city light on your street and don’t have one, the city said you can request by calling 311.

https://www.newson6.com/story/41490226/tulsa-sets-aside-dollar25000-for-installing-requested-street-lights


While you are at KOTV's website, click thru all the crime photos lit by streetlights.
We didnt install streetlights because the city ran out of money subsidizing peoples yard lights, and crime-control methods that havent worked

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"Tulsa will lay off police and firemen before we will cut back on unnecessarily wasteful streetlights."  -- March 18, 2009 TulsaNow Forum
patric
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« Reply #482 on: February 29, 2020, 08:34:54 pm »

As Cities in Oklahoma Update Streetlights With LEDs, Doctors Warn About Road Ahead

...It’s confusing, but the color temperature number Baker referenced is important. Smaller numbers are perceived as warmer and oranger, larger numbers are cooler and bluer. At 4,000 Kelvin, the LED street lights in downtown Tulsa appear white, but Dr. Mario Motta says they’re actually too blue.

“If you put a spectrometer on it, the 4000K LEDs are 30 percent blue,” he says.

Motta is a medical doctor who has studied how lighting affects human health. He’s also an avid amateur astronomer who has researched the environmental effects of light pollution. Motta helped author guidance recently issued by the American Medical Association. The country’s largest organization of physicians now urges cities to avoid LEDs on the blue end of the color spectrum.

“It’s bad for human driving. It’s hurtful to the eye. It actually causes pupillary constriction, so you see worse in the dark,” Motta says.

Motta and other doctors say blue-ish light can disrupt sleep patterns, hormone regulation and other internal biological cycles.

Research also suggests blue-hued lighting affects birds, insects, turtles and other nocturnal wildlife.

“They’re sold as very energy efficient, eco-friendly, green because they use less electricity,” Motta says. “But as soon as they’re put up, the complaints start roaring in.”

LED street lights have received fierce backlash around the country, from Seattle to Brooklyn. The city of Davis, California, paid $350,000 to replace hundreds of LEDs with warmer units residents could live with.

City traffic engineering manager Kurt Kraft says Tulsa has been installing the bluer-hued LEDs — in both the downtown area and a handful of new highway projects — but said officials would consider changes if new science comes in.

“I think the consensus is more research needs to be done in looking at the longer term health effects and the exposure from street lights in particular,” Kraft says.


https://stateimpact.npr.org/oklahoma/2016/07/21/as-cities-in-oklahoma-update-streetlights-with-leds-doctors-warn-about-road-ahead/
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patric
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« Reply #483 on: April 22, 2020, 09:10:55 pm »

One of my favorite LED streetlight designs got an upgrade to 2700K (Incandescent warm-white color) which has a much greater public acceptance factor than the garish blu-ish ones we see too much of today.




The Verdeon LED roadway luminaire is now available with the new C-Series LED upgrade, along with a new Type I optic and a standard option for 2700K CCT (80CRI).

http://www.cooperindustries.com/content/public/en/lighting/products/roadway_lighting/_865303.html

http://www.cooperindustries.com/content/dam/public/lighting/products/documents/streetworks/spec_sheets/strworks-verdeon-cseries-spec.pdf

(And of course I have no financial interest in the maker)
« Last Edit: May 04, 2020, 10:00:47 pm by patric » Logged

"Tulsa will lay off police and firemen before we will cut back on unnecessarily wasteful streetlights."  -- March 18, 2009 TulsaNow Forum
Cetary
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« Reply #484 on: May 03, 2020, 11:04:30 am »

Here's a video showing the 2700K GE Evolve vs the amber toned 1700K LPS.

https://www.youtube.com/watch?v=7DU9ev3VuXw

Those two pictures showing the lights on residential are using 14 watt 2700K lamps on 25 foot poles. This is a far cry from the 70-100 watts of HPS that was used allot in similar setups although Murrieta had 55 watts of LPS on the poles previously. While I might not mind 2700K on arterial roads, I feel that residential should be warmer or even use PC Amber LEDs in neighborhoods with low to moderate pedestrian activity. They are beginning to install PC Amber LEDs in residential in Riverside, CA. Cree has also announced a 2200K RSW, no date on when that will show up on the spec. sheets though.


Lexington, MA is replacing their old 4000K induction fixtures with 2700K LED which is a tremendous improvement. The induction fixtures were installed around 2010 and were part of the first waves of HPS swap-outs. Hopefully we'll start seeing more of this as other fixtures reach the end of their useful lifespan.

https://lexington.wickedlocal.com/news/20200302/led-streetlights-to-save-lexington-money-energy

Pittsfield, MA is another community going 2700K, but this time from FCO HPS. I believe they also did surveys that showed the majority preference was in the 2700K. People preferred the 2700K fixtures over the 3000K.

https://www.cityofpittsfield.org/city_hall/public_services/streetlight_led_conversion_project.php

Pittsburgh is having Carnegie Melon University research future lighting solutions for their upcoming conversion. The highest CCT they are considering is 2700K. They do have at least one street with 2200K test fixtures, so they are looking into the very warm range.
 
« Last Edit: May 03, 2020, 11:08:38 am by Cetary » Logged
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