Thomas MacMillan Photo
LED streetlight (left) offers whiter light than conventional lamp (right).
This spring, a bright white light began shining in Newhallville. With a new approval from city lawmakers, the light is spreading, and may one day engulf nighttime streets all over New Haven.
The light shines from new LED (light-emitting diode) streetlights, which offer better illumination with half the electricity of traditional streetlights.
In May, at the behest of neighborhood organizers, the city installed 11 LED streetlights on Lilac Street. Along with saving energy, the lights are meant to increase public safety by keeping the street better lit at night.
Newhallville Alderwoman Delphine Clyburn said the lights have improved safety. “On those streets it’s actually been better.”
Last month, the Board of Aldermen authorized an agreement with the Connecticut Energy Efficiency Fund for the installation of about 2,000 new LED lights. City engineering department staffer Giovanni Zinn said that’s a little less than 20 percent of the city’s total of 10,300 “cobra-head” streetlights (named for their shape). It’s part of an effort to eventually convert all of the city’s streetlights to LEDs.
The new deal, which is administered by UI, comprises a grant and financing. It won’t lead to change in the city’s energy bills in the first three years, but will result in savings after that, Zinn said.
Here’s how it works:
The total project cost for the installation of about 1,800 streetlights is about $600,000. One third of that would be paid for by “incentive payments” from the Connecticut Energy Efficiency fund. This amounts to a grant of $200,000. The city will pay the remaining $400,000 through three years of interest-free financing — a no-interest loan. The monthly payments will appear as part of the city’s regular bill to United Illuminating. The increase in the monthly bill is equal to the savings projected from the reduced use of energy by LED streetlights, Zinn said. The project is thus “cost-neutral” for the first three years.
After that, the city will start to see significant savings, Zinn said. Savings will amount to $100,000 per year after the first five years, according to a letter from city engineer Dick Miller to Board of Aldermen President Jorge Perez.
The savings come despite the fact that LEDs cost more then traditional streetlights.
“It’s the next lighting technology,” said Zinn. He outlined a number of the advantages LEDs have over the current high-pressure sodium (HPS) lights the city has.
LEDs are “much more directional,” able to “light the road and only the road,” he said. This saves energy and prevents light pollution, including spillover light shining into people’s windows or up into the night sky.
Lilac Street.
LEDs also offer a much whiter light than the orange light put out by HPS lights. “It’s closer to daylight,” Zinn said.
As a result LEDs have a much higher Color Rendering Index, meaning it’s easier to differentiate between colors under an LED. “Any time people can see better their surroundings, they’re more aware of what’s going on,” Zinn said. That leads to a safer community, he said.
Because LEDs produce light to which the human eye is more sensitive, they don’t need to produce as much light as a traditional fixture, which makes them more efficient.
LEDs also employ “solid-state” technology, and thus require less maintenance, Zinn said. The lights are advertised as lasting for 100,000 hours, which amounts to about 22 years, since the lights are on only at night. The city’s HPS lights last at most seven years, and require a significant amount of maintenance, Zinn said. “They’re much more finicky.” The city expects the LEDs will be completely maintenance-free for the first 10 years, Zinn said.
Paul Bass File Photo
A new LED light on Lilac Street.
LED streetlight fixtures comprise 20 to 120 LED “chips,” he said. If one goes out, the light will still function. That’s different from a HPS light, which has just one bulb. “There’s a partial failure mode in an LED that you don’t have in a conventional fixture,” Zinn said.
In addition to the 1,800 lights the city will convert under the latest deal, plans are already underway to convert another 250 HPS lights to LEDs in the next couple of months, paid for by a grant from the state Department of Energy, Zinn said. Those LEDs will be installed around Lilac Street, expanding on the conversion that’s already occurred there.
Zinn said it remains to be determined where the 1,800 new lights will go, starting in the spring. “We’re looking at areas where it really would enhance public safety,” he said. The city wants to convert a variety of sizes of fixtures, and to do whole blocks at once, he said.
The city aims to eventually swap out all its HPS lights for LEDs, Zinn said. “We’re looking to change the whole city over as soon as we possibly can.”
“We’ll Be Glad”
The contrast is clear at the corner of Lilac and Winchester.
Tyrone Alexander, standing on his second-floor porch at the corner of Winchester and Lilac streets (pictured) said new street lights don’t prevent crime.
“Street lights don’t make it safer,” he said. “People make it safer.”
Alexander said the brighter lights might make traffic accidents less likely, but they won’t stop criminals.
Alderwoman Clyburn disagreed. “I wish I could get that brightness on every street,” she said. “If it will save money and give us some light, we’ll be glad.”
Tanya Smith-Long, who lives near Lilac Street, said the LEDs are “absolutely a definite improvement.” The LEDs are not only brighter but harder to break, she said. Drug dealers in the neighborhood throw rocks at lights to knock them out, she said. That’s more difficult with the LEDs.
Tammy Chapman, who lives on Winchester near Lilac, said the next step is to introduce “second-stage lighting.” The street still needs more light from porches to deter crime, she said. “Our goal is to push the gangs out.”
Smith-Long suggested the city should have some sort of incentive program to help people to install exterior lighting on their homes.
Nothing says "drugs readily available" more than these lights. I'd be ashamed to have these in my neighborhood.