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2010-06-25
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Applications,
design and technology news from across the industry
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Editorial: Equivalence claims in LED lighting
... How do you describe an LED "lightbulb", of any style or type, that delivers the equivalent light output "on the target" as would a 60-, 75- or 100-watt incandescent lamp for the use that it is intended, but which doesn't put out the total lumens or the distribution that...
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latest device, material and process news, it's all there!
2012 SSL Summit Series keeps its focus to Smarter, Better Lighting
Launched in 2008, the SSL
Summit has tweaked its mission to facilitate a future of better lighting.
October's New York City meet really hit the target, and we're picking up the
pace for LA/Long Beach April 3-4, 2012. The Summit brings together key lighting
influencers with industry thought leaders, pioneers, and innovators from the
across the solid state lighting eco-system to engage their visions of the future
of lighting.
Quality is the gate, the future is the focus...
Showcase participants and sponsors are vetted to separate
the wheat from the chaff... Look into the series information at www.SSLsummit.com
for the details. Sponsorships and showcase positions are available now, and
event registration will open in early January.
Solid State Lighting Design
is here to serve the information needs of lighting designers, specifiers, and
decision makers, along with luminaire designers, lighting system integrators
and lighting subsystem developers with application, product and market news
updates for this rapidly evolving technology. Our readership also includes LED
packagers, technology enablers and service companies seeking the answers to
how best to meet their customers' needs.
Solid
state lighting promises to create unprecedented changes in what we can do with
light. Simultaneously, it will deliver on a promise of massive global energy savings
and access to useful nighttime lighting that has not been conveniently available
to nearly 2 billion people around the world. We're glad to have you join us in
the revolution!
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Results of DOE's Gateway Demonstration of LED-based Parking Lot Lighting Published SSLDesign News StaffJune 25, 2010...The U.S. Department of Energy has issued results of its GATEWAY demonstration of LED-based Parking Lot Lighting at T.J. Maxx in Manchester, New Hampshire.
The project involved replacing a total of 28 [22- 400W (nominal) high-pressure sodium and 6- 400W metal halide] luminaires manufactured by Spaulding with 25 LED luminaires manufactured by BetaLED.
The T.J. Maxx is the main tenant in the parking lot of the demonstration.
In the GATEWAY demonstration each LED luminaire had an array of 120 LEDs. The luminaire was controlled by
an integral occupancy sensor that connects to a driver varies its operation between “high” and “low” light output settings.
According to the study conducted by the Pacific Northwest National Laboratory, the BetaLED product achieved an estimated payback in this installation of about 3 years because of
high electricity ($0.14/kWh) and maintenance costs incurred by the conventional products at this location.
Using the lower national average electric rate of $0.104/kWh and more typical maintenance rates results
in a payback slightly more than 5 years.
The report says that much of the 58 percent energy savings supporting these payback calculations
is attributable to the 47% reduction in average light levels for the “high” output setting.
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Bridgelux Makes New Neutral White Light LED Arrays Commercially Available SSLDesign News StaffJune 25, 2010... Bridgelux Inc., of Livermore, California USA, announced the commercial availability of its ES and RS LED Array products in a neutral white color temperature (4100K). The new Array products extend Bridgelux add to the company's portfolio of Array products for high volume outdoor area and commercial lighting applications.
Neutral white is the latest addition to Bridgelux’s efficient ES Array Series providing light output options of 400, 800 and 1200 operational lumens. The company says that the new ES Array LED light engines deliver an increase of more than 40% in energy efficiency over previous neutral white product generations while dramatically reducing the price per lumen. The powerful neutral white RS Array delivers 3400 operational lumens, complementing the existing RS Array product line which offers 3100 lumens in warm white and 4500 lumens in cool white.
“Bridgelux is delivering a broad range of design options with efficacies that enable the development of lighting products that meet both market demands and global regulatory requirements,” said Jason Posselt, Bridgelux vice president of Marketing. “Our expanding portfolio reflects Bridgelux’s core strength – the ability to reduce design complexity and product development risk for our customers while aggressively driving down the cost of solid state lighting.”
Lighting Science Group to Get Die-Cast Parts from Pace Industries SSLDesign News StaffJune 25, 2010...Lighting Science Group of Satellite Beach, Florida USA has entered into an agreement with U.S. die cast company Pace Industries in which Pace will supply key components to Lighting Science Group. The alliance is expected to increase Lighting Science Group's manufacturing capacity and efficiency as a result of the reduction in supply times for critical LED product components. Lighting Science Group will reportedly be taking other measures to expand its manufacturing capacity including creating a substantial number of new jobs.
Pace Industries Harrison Division, located in Arkansas, will supply Lighting Science Group's Florida manufacturing facility with die cast components for its residential, commercial and infrastructure product lines. These product lines include: the Definity retrofit LED lamps, traditional series luminaires, the C2D Site and Area lighting family, and the PROLIFIC series of roadway luminaires.
"This is a perfect American manufacturing match," said Zach Gibler, Chief Executive Officer of Lighting Science Group. "The relationship will not only help increase our manufacturing capacity and efficiency, but it will also provide an opportunity to grow our U.S. workforce and increase sales. This is a win-win-win situation — good for Lighting Science Group, good for Pace Industries, and good for America."
"In an era where many manufacturing jobs are being created overseas, this alliance will assist in creating jobs right here at home," said Scott Bull, Chief Executive Officer of Pace Industries. "We are very excited to be working with Lighting Science Group in the production of their next generation LED lighting products."
FTC Outlines New Labels for Light Bulb Packaging SSLDesign News StaffJune 22, 2010...The Federal Trade Commission announced that starting in mid-2011 consumers shopping for light bulbs will notice new labeling on packaging.
The new labeling will be designed to help customers choose among the different types of bulbs on the market including: traditional incandescent bulbs, and newer high-efficiency compact fluorescent (CFL), and light-emitting diode (LED) bulbs.
The FTC says that the new front-of-package labels will emphasize lumens to be the measure of brightness, not watts. This will obviously be new to some consumers. To help consumers understand the savings potential an estimated cost of electricity per year of use will also be included in the label.
A diagram with number line with the color temperature is designed to help consumers comprehend correlated color temperature. The higher the color temperature in degrees Kelvin, the cooler the light appearance.
The label will also include the life expectancy in years of life based on three hours of use per night.
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Seattle to Test LED Streetlights on Arterial Streets SSLDesign News StaffJune 23, 2010...Seattle, Washington's City Council member Bruce Harrel announced the expansion of the current LED streetlight pilot project to include LEDs on arterials (freeways) in a four block area of Belltown and a five block area of the Central District. Installation is scheduled for August.
In Belltown, LED-based street lights will be installed on 2nd Avenue between Wall and Lenora streets and in the Central District, on Cherry Street between 23rd Avenue E and Martin Luther King Jr. Way S. Both areas have had their share of nighttime troubles.
“These are the first arterials in our city to be tested for LEDs,” said Councilmember Bruce Harrell, Chair of the Energy, Technology and Civil Rights Committee. “Effective streetlighting is essential to fostering safe neighborhoods and a safe nightlife environment.”
According to the councilmember Harrel, currently, City Light is in the third phase of a four phase effort to re-lamp all 84,000 streetlights in the city. The improved service and LED transformation is unprecedented in Seattle.
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GlacialTech Introduces DC-powered LED Path Light SSLDesign News StaffJune 23, 2010...GlacialTech Inc. introduced the GL SD30, a 34W, battery-powered LED flood light that is powered by a11-15V/22-30V DC power supply. According to the company, batteries can be placed with these LED trail lights or, its low-voltage LED, power-supply cables for the SD30 can safely buried in shallow ditches . It is reportedly resistant to water spray and moisture and can operate from solar power collecting batteries. The GL-SD30 series is available in Warm White at 3000K color-temperature (GL-SD30-WW) and in Cold White at 6000K color-temperature (GL-SD30-CW).
It lasts for a minimum 20,000 hrs.
Design of GL-SD30 LED lighting products is based on three core technologies including LED drivers, thermal management, and optical design of lamp holders respectively performed by GlacialPower, GlacialTech, and GlacialLight in the GlacialTech family. Its directional lighting is reportedly ideal for flashlights/torches and spotlights.
The GL-SD30 with a narrow beam angle of 30 degrees is suitable for spotlighting and its wide, 60 degree, beam angle is for floodlighting.
The LED driver has under-voltage and over-voltage protection.
For safety, the LED driver is equipped with Undervoltage-Lockout (UVLO) and will prevent damage, should the DC power supply's voltage fall below adequate levels. For a 12V this level is 11V and for a 24V this level is 22V. Furthermore, Over-Voltage Protection (OVP) will prevent damage to the LED lamp should there be an unpredictable excess of DC output voltage.
While a standard 12V or 24V DC power supply can be used to power the LED lamp,
GlacialTech points out that in fact, any voltage between 11-15V or 22-30V is completely suitable.
It reportedly has LED driver efficiency greater than 87% and is compliant with safety regulations: EN60598, EN61347-1+EN61347-2-13, EN55015+EN61547, EN60529, EN62471, EN62031, FCC Part 15. Holiday Inn Old Town and Casa Romantica Install ilumisys LED Light Tubes SSLDesign News StaffJune 17, 2010...Holiday Inn Old Town in San Diego and Casa Romantica in San Clemente, California USA have installed ilumisys LED light tubes.
ilumisys' channel partner Ecogreen Solutions Inc. helped with the installation, which the hotels wanted to reduce energy costs and maintenance requirements.
Ecogreen Solutions of Los Angeles, an LED supplier and retrofit company, replaced T-8 fluorescent lights with ilumisys MK-1 LED light tubes at both facilities. Ecogreen Solutions calculated that the installation will result in nearly $4,000 in energy costs savings annually for Holiday Inn Old Town and more than $10,000 in annual savings for Casa Romantica.
Holiday Inn Old Town reportedly replaced over 200 fluorescent light tubes in areas that operate 24/7, including its subterranean parking lot and stairwells throughout the building. ilumisys points out that another important motivation for switching to LED lighting is its much longer lifetime which greatly reduces maintenance and replacement costs compared to fluorescent tubes.
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Commentary
& Perspectives...
June 25, 2010...How do you describe an LED "lightbulb", of any style or type, that delivers
the equivalent light output "on the target" as would a 60-, 75- or 100-watt
incandescent lamp for the use that it is intended, but which doesn't put out
the total lumens or the distribution that those "old bulbs" do? If you want
it to be part of the Energy Star program, you pretty much have to simply steer
clear of the topic. It's leading me to believe that the current Energy Star
program, as it applies to omnidirectional replacement lamps, is going to flop.
Some might argue, I think incorrectly, that in 2 or 3 years, it will be a moot
point anyway, since it won't really be a tough technical challenge to put out
the equivalent number of lumens, in an equivalent package, in an equivalent
distribution. While it may be true that it can be done, the better question
is, "Should it be done?" I mean, the whole point of solid state lighting
is that it can do the job of lighting our world better in a whole lot of ways,
mainly by delivering the right light, only where it's needed, using less energy.
It's probably important to veer off and share some perspective for a few paragraphs.
Make no mistake on what we're saying here. The intentions of the Energy Star
program are good, and the US Department of Energy, with its congressional mandate
to promote solid state lighting, has done a spectacular job overall of helping
to support the industry in developing some very useful metrics and methodologies
that will help lay the groundwork for more success sooner. And the DOE-crafted
version of the Energy Star SSL specifications will be very useful to set a series
of benchmarks that manufacturers will strive to meet and exceed to maximize
their credibility. At the same time, I'm predicting that it won't take long
to screw it all up if Energy Star is left fully in the hands of the EPA for
very long. That won't necessarily be the fault of the individuals involved,
but simply the natural result of the differing missions of the two agencies.
The DOE's related mission is fairly clear (from its website): The Department
of Energy's overarching mission is to advance the national, economic, and energy
security of the United States [and] to promote scientific and technological
innovation in support of that mission. The Environmental Protection Agency,
on the other hand, has a far different mission (also from its website): The
mission of EPA is to protect human health and to safeguard the natural environment
-- air, water and land -- upon which life depends. Anything about economic
considerations? Anything about energy? Anything about technology? Not that those
should necessarily be part of the agency's mission, as long as there are counterbalances
built into the overall structure. Someone has to start with the simple idea
of "let's make all the water clean and all the air pure". Picking
up "some of the trash here and there" shouldn't be the goal. Go after
all of it. From that starting point, the broad discussion needs to expand to
balancing what we want to do, what we need to do, and what we can afford to
do. Zero carbon emissions. Fine, whatever, but we kind of still need to produce
and transport food and goods, and be fairly free to pursue that "life,
liberty and pursuit of happiness". Runners expel far more CO2 than walkers
do, so we should outlaw running? I think not. It's a balance and the EPA is
charged with starting at the "stop" end of the scale. Again, nothing
wrong with that, I just don't think it bodes well for Energy Star to depend
on getting a balanced approach from an agency that doesn't have the balance
as part of its most basic mission. "Energy Star" becomes a defacto
"Environment Star" certification. "Emit less carbon and live
in the dark... mission accomplished!"
So let's right turn back into the LED lighting realm, setting aside any predictions
of colossal screw-ups to come and just considering the specs as they stand today.
People don't typically want light in the air, we want it "on" things.
Sometimes it's our books, or our workspace, or a counter, or sometimes it's
our wall or ceiling in order to create that level of ambient light that makes
us comfortable, or productive, or both. We get light from fixtures of different
types (or most properly "luminaires", which are the sum of the structure
that holds the light source, feeds it electricity, and the light source itself...
but I've mostly given up the semantic fight and use fixture and luminaire synonymously
to satisfy the search engines). We screw or plug bulbs (aka "lamps")
into the variety of fixtures that we've created, and those fixtures have been
built around the characteristics of the bulbs we've had access to. Some direct
light fairly well, either by depending on the design of the bulb to shape the
light internally (R's, PAR's and MR's) or by using the structure of the fixture
to reflect light out from the non-directional source (the strategy that high
efficiency fluorescent fixtures employ). The more directional, the more you
pay for it, since it requires more engineering, better materials and more precise
the manufacturing required. If "not wasting the lumens", and therefore
the energy, is important to you, you'll pay extra for that, which commercial
and industrial operators understand.
LEDs do that directionality thing quite naturally. You actually have the reverse
challenge, which is that you have to pay more to make the light omnidirectional.
That's the basis of the "LEDs are most competitive when you purpose-build
complete luminaires to do specific jobs" argument, and it is absolutely
true. And the vast-vast majority of tasks we want our lights to do are directional.
Sometimes broadly so, but still aimed at some subset of "everywhere".
The problem is, we have a whole bunch of fixtures in this world that have been
designed to make the best of the omnidirectional nature of our existing sources.
We're not tossing the majority of those sockets out. They're attached to fixtures
that great-grandma owned, or that are attached to our ceiling, so we're keeping
them. So should we try to fill those billions of existing sockets with something
that simply mimics the older, less efficient solutions, or with something that
does the job better? Obviously, we want to do the job better, and are really
only limited by certain practicalities of dealing with a manageable number of
product models, and clearly communicating to the customer what it's suited for.
Of course, more informed/educated customers are easier to communicate that to.
"Zonal lumens" make sense to lighting professionals, but not to the
average consumer.
So that's where the whole equivalence thing comes in. We've got a collective
chore ahead of us to simply get the concept shifted from watts, in incandescent
parlance, to lumens (with a big raspberry to the CFL producers, who did pretty
much nothing to help that cause over the last few decades...). The need to describe
things LED lighting, for a while, in terms of equivalence will be important
to aid consumer adoption. Thanks again go to the DOE for kicking off the Lighting
Facts label, which has created a model that the FTC is adopting as part
of new lightbulb labeling guidelines that have
just been announced, which are aimed squarely at that transition.
Unfortunately, Energy Star for integral replacement lamps requires a product
to pretty much "mimic" the zonal lumen performance of the lamp it's
claiming to replace. Fine for the more omnidirectional reflectors, but a real,
and I would submit, somewhat pointless challenge for the A19 style of "Edison"
lightbulb. I believe it will take something like minutes for commercial operators
to realize that they don't want screw-in lamps that replace the badly arranged
lumens of the old technology. If it's going in a recessed can, they want the
light down, with enough sideways so the source inside is pretty much invisible.
Instead of 10 watts to distribute the light "everywhere" a hotel would
prefer to invest 4 watts in a bedside lamp to shoot a little light up for ambiance,
a little sideways and the rest towards the bed where the occupant is reading.
Light where it belongs, so you need less lumens to do the job. It's the successful
premise of dedicated LED fixtures, and the buyers will figure that out pretty
quickly at the commercial level, and eventually for our homes.
That's where the current Energy Star requirement for omnidirectional replacements
gets in the way now, and based on EPA's handling of the Residential Light Fixtures
spec (with its "who cares that most of the light is lost in the fixture,
as long as the wasted light is created efficiently" approach), I expect
it to be more useless in the future. If you want to have products in Energy
Star, their equivalency claims are severely limited, throwing the more informed
commercial operators under the bus in the interest of not disappointing our
consumers (apparently consumers are a little behind in class, so rather than
give them extra tutoring, we've just going to bring everyone down to their level).
Meanwhile, SSL market growth is going to come soonest, and most importantly,
from that more informed commercial/industrial operator who knows they want lumens
where the want them, not replacement lamps, which will force many LED "lightbulb"
producers to opt-out of Energy Star, simply so they can address the commercial
market in the simplest way, by presenting common sense equivalency claims such
as "performs equivalent to a 60 watt A19 incandescent in downlight applications".
As long as those are made with integrity, and not with an intent to deceive
based on some technicality, it's going to be a good approach. It will also be
self-policing, as word of the less integrity-based claims will get out and those
companies will lose future business.
Fortunately, the FTC has declined to tackle the watt-equivalency claims, for
some good reasons, although not for the reasons outlined here. You can jump
straight to page 21-22 to see the discussion on that topic in the FTC's full
write up of the labeling initiative at http://www.ftc.gov/os/2010/06/P084206lamplabeling.pdf.
So what's the impact of companies opting out of Energy Star? As long as the
utilities and energy efficiency organizations continue their common sense approaches
that have not made Energy Star the sole criteria to qualify for energy saving
incentives, it's really not that much. While Energy Star brand awareness is
high, the actual penetration of Energy Star in lighting is pretty low. Based
on the current good specs (the DOE-driven ones outside of the A19 type), that
will likely grow well until energy efficiency organizations see that EPA attempts
to merge the specs will likely water them down to the point of uselessness in
the future. And for the omnidirectional ones... I'll predict that any company
with eyes on the commercial market will steer clear so they can market their
product most effectively.
Tying together the big picture of LED lighting is what the 2010-2011 SSL
Summit series is all about. Replacement lamp and retrofit market opportunities
will be in the highlighted in both New York, September 14-15, as well as next
January in LA. Speakers, sponsors and showcase participants are vetted to assure
their "truth in advertising" as well as "specs match the tests"
criteria, so you know you won't be wasting your high-level networking time with
pretenders. A quality event for quality participants -- www.SSLsummit.com
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