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Spark LED Lighting Solution for Tunnel Project
SSLDesign News Staff
July 23, 2010...Lighting inside a tunnel has unique design challenges. A person entering a tunnel in car quickly travels from outside with an external light source, to inside a tunnel.
As Spark LED points out, in the entrance of tunnel a changeover portion (from clear to dark) should be made ensure people can see things clear by light changing. For the exit of tunnel, the conforming period is very short, normally within 1 second, so no need to do other dispose.
Tunnel lighting is an necessary part of tunnel building because even in the daytime, the whole tunnel need electrical lighting inside. Noise, exhaust fumes, vibration, etchant gas are part of the environment, and any tunnel lighting must be able to withstand all of these.
Spark LED created the fixtures for a tunnel in Roma, Italy. The LEDs used in the fixtures boast an efficacy of 114-122 lm/W at 3.2 volts and 320 hA. 56 LEDs within each fixture consume a total of 72.6 Watts. Within the tunnel that spans 736 meters, 103 tunnel lights consume 7374.8 W.
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Schreder Launches LED-based Outdoor Light Powered By Osram LEDs
SSLDesign News Staff
July 23, 2010...Schreder of Elk Grove Village, Illinois unveiled the Alura LED, an outdoor light powered by Osram's Golden Dragon Plus LEDs. The light uses 40, 1-watt LEDs arranged in a circle. The light eminates from a conically shaped fixture through optics which spread the light 360 degrees (Type 5 distribution). The Alura comes in a color temperatures of 6000K, neutral white, and warm white options. The company says that the optical compartment is designed with an IP66 tightness level. The fixture has a circular top held up by four metal prongs. The light is made for outdoor urban environments such as: parks, playgrounds, and parking lots.
City in India Commits to Cree LED Lighting
SSLDesign News Staff
July 22, 2010...Cree has obtained business from a country that has been conspicuously absent from most solid state lighting related news, India.
Cree reports that the town of Tirupati, India has committed to using Cree LED-based lighting solutions. Tirupati Municipal Corporation in the Chittoor district of Andhra Pradesh has reportedly converted more than 140 street lights to LED-based fixtures on two of the town's busiest roads. Tirupati is home to the Venkateswara Swamy temple. Between 50,000 and 100,000 pilgrims visit the temple each day. It is one of India’s important pilgrimage centers and a major economical and education hub in the southern region of Andhra Pradesh.
Tirupati reportedly selected LED lighting to address escalating infrastructure costs. Avni Energy Solution Pvt. Ltd, a Tirupati-based company, supplied and installed LED street lights along the city’s main thoroughfares.
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Lighting Science’s LED Street Lights to Illuminate Vista Verde Country Club
SSLDesign News Staff
July 21, 2010...LED street lights, from Lighting Science, will illuminate Vista Verde Country Club streets in Tehuacan, Mexico. The company's Prolific series of LED lights have been installed in the country club. Lighting Science expects that the lights will help in reducing the cost of maintenance and decrease the consumption of energy for the club. The installation was jointly announced by BHP Energy Mexico and Lighting Science Group.
Lighting Science tested the Prolific series of streetlights under the LM-79 process outlined by the U.S. Department of Energy to assure reliability and performance. The company points out that the Prolific LED lighting technology also avoids expensive re-ballasting and re-lamping of HID streetlights.
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Commentary & Perspectives...
How many lights in an airport?
Tom Griffiths - Publisher
July 13, 2010...Airports have begun making the news recently. Fortunately this time around, it's not for security challenges or full-body scan pictorials, but because they are picking up on the fact that LED lighting is a good idea that can reduce operating expenses and improve the user experience. Some of the more recent wins include Boston, Miami and Pittsburgh, where parking structures have been the first target of opportunity to "see the light".
In
the case of Boston's Logan Airport, with 30 year old lighting ("before"
picture at left) in the Terminal B parking facility, a lighting upgrade revamp
was going to happen either way. Dan Hallahan is the LEED accredited engineer
with engineering firm Fay, Spofford and Thorndike. Dan was responsible
for the overall lighting design, product recommendations and on-site evaluations for
the project, including a pilot installation to compare several different manufacturers LED fixtures. This was their firm's first LED lighting implementation, and they
were pleasantly surprised by the smoothness of the process, and the quality
of the result. "The main considerations included the payback period and efficiency. So prior to selecting the source, we reviewed options to reduce the lighting when it's not necessary. The options include using natural daylight along the parameter of the garage and using occupancy sensors to control the lighting. We designed an occupancy sensor network in the garage to switch large sections of lighting at a time rather than individual lights. If occupancy is detected within 80' of a neighboring section, that triggers the neighboring section to power 'on' allowing drivers ample time to react. With the LED solution, we were able to completely turn off all non-emergency lighting when the lighting isn't needed. We couldn't do that with metal-halide because they require a long warm up period," commented Dan.
The
fact that the Terminal B facility needed the update was key to solid state lighting
being able to take the win ("after" picture at left). Essentially,
Massport was able to consider the acquisition-cost uplift as a delta, compared
to the energy savings that would result. The payback was less than 5 years,
which Hallahan considered "a slam dunk" in terms of acceptable business
cases. Makes sense, considering the last installation had a 30 year life span,
so they didn't need to see 1-2 years to visualize the advantage. With about
8800 hours in a year, 5 years represents about 44000 hours, which would be well
within the product lifetime, given the dimming strategy that the design employs.
Interestingly, when I asked about the other main parking structure at Logan, while there could be an energy saving opportunity, the lighting installed there was "only" 10 years old, is running pretty efficiently, and wasn't likely to be replaced anytime soon. Make no mistake in assuming the incumbents are going to be easily knocked aside. LED lighting can bring a lot to the table, but it faces more than just simply economic decision criteria.. Even when the payback might be clear, whether it is 2, 5 or 10 years, a lighting retrofit is a big task, takes a lot of resources, and is a distraction to the day-to-day business that goes on in a facility. Plus it takes money. Lots of it, and whether it is accomplished with good quality metal halide fixtures (at $300+ a crack) or LED luminaires (not bad, but still more than that), it's not complicated math to figure out that anything over a few thousand fixtures makes it over a million dollar deal. That's not money that's spent lightly, and if it's not handy, it won't be spent at all, regardless of the payback. Municipalities and port authorities are running on tight budgets, and if the capital appropriations aren't there, they have to pursue a nontrivial approval process which may include submitting a bond issue to the voters. But if you need to replace the installation anyway, the delta in those capital budgets becomes substantially lower, and the door opens much wider to the LED lighting alternatives.
Why are we seeing this high-profile upswing? In a word, it's belief, according to BetaLED East Coast Regional Sales Manager, Michael Winegard. Michael oversaw the Terminal B win in Boston, and has reportedly just gotten the nod to equip Logan's new economy parking structure as well as an existing parking structure at Portland Maine's airport. He tells us it's a very different world from two years ago. As the ground was being plowed "back then", it really was a process of enticing the potential users to simply open their minds to the possibility that these new LED lights could be a good idea. While the semiconductor industry had its own track record, LEDs were generally considered to simply not be ready to produce the amount, quality and reliability of light that the incumbents had been delivering for decades. But the industry did well to promote installations and learn from their missteps, and a positive track record began to emerge. "Now, the industry has high profile installations and large scale wins that it can point to, including the I-35 bridge in Minnesota, the city of Anchorage, Alaska and very notably, the City of Los Angeles that is moving ahead with its wide-scale streetlight retrofit plans. Municipalities and facility managers are willing to listen to the full business case simply because there is enough success that indicates the technology works and can be relied on."
So progress continues and airports are on the radar scope. With 3000 or so publicly operated airports, as we move from the parking structures to the ramps, taxiways, runways and eventually on inside the buildings, there is still a bit of room in the opportunity...
Don't miss the 2010-2011 SSL Summit Series, kicking off in New York City, September 14-15. One of this year's highlighted speakers is Margaret Newman, Chief of Staff for the NYC Department of Transportation. Margaret, who is also quite influential in New York City's overall lighting initiatives, will be able to share the methodology and status of their outdoor LED lighting retrofit programs. Installations include the US DOE cooperative evaluation program on the FDR Expressway, as well as some walking path and sidewalk installations around the city. How big is the NYC opportunity? Only a 10 states have a larger population then New York City does on it's own, so it would seem worthwhile to find out the details... www.SSLsummit.com
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