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Switching to LEDs
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Cree Achieves Highest Efficacy from a High-Power LED
NIST Verifies Results
DURHAM, N.C., SEPTEMBER 13, 2007 — Cree, Inc. (Nasdaq: CREE), a leader in LED lighting components, today announced it has achieved R&D results of 129 lumens per watt for a cool-white LED and 99 lumens per watt for a warm-white LED. These are the best results reported for packaged, high-power LEDs, and they clearly indicate that Cree is extending its lead in solid-state lighting through its continued investments in LED technology.
The results have been verified by the National Institute of Standards and Technology (NIST). NIST’s tests confirmed that the cool-white (5,813 K) LED produced 135.7 lumens of light output and achieved 129 lumens per watt efficacy. The warm-white (2,950 K) LED produced 104.2 lumens of light output and achieved 99 lumens per watt efficacy. The institute tests LEDs at 350 mA and measures the output after five minutes of operation to ensure thermal stabilization.
In coming years, such investments in core LED technology could lead to products that replace traditional light sources in all commercial applications. Customers may see these technology advancements in commercial products within 12 to 24 months.
“To replace traditional light sources, LEDs need to provide both high light output and high efficacy,” comments John Edmond, Cree co-founder and director of advanced optoelectronics. “Cree continues to push the limits of LED performance in order to realize the potential of the LED lighting revolution – energy-efficient, long-lasting LED light.”
For more information on Cree high-power LEDs, please call (919) 313-5300 or visit www.cree.com.
About Cree, Inc.
Cree is a market-leading innovator and manufacturer of semiconductors and devices that enhance the value of solid-state lighting, power and communications products by significantly increasing their energy performance and efficiency. Key to Cree’s market advantage is its world-class materials expertise in silicon carbide (SiC) and gallium nitride (GaN) for chips and packaged devices that can handle more power in a smaller space while producing less heat than other available technologies, materials and products.
Cree drives its increased performance technology into multiple applications, including exciting alternatives in brighter and more-tunable light for general illumination, backlighting for more-vivid displays, optimized power management for high-current, switch-mode power supplies and variable-speed motors, and more-effective wireless infrastructure for data and voice communications. Cree customers range from innovative lighting-fixture makers to defense-related federal agencies.
Cree’s product families include blue and green LED chips, lighting LEDs, LEDs for backlighting, power-switching devices and radio-frequency/wireless devices. For additional product specifications please refer to www.cree.com.
This press release contains forward-looking statements involving risks and uncertainties, both known and unknown, that may cause actual results to differ materially from those indicated. Actual results may differ materially due to a number of factors, such as the risk we may be unable to develop and release commercial products with performance ratings comparable to the development results described above; the risk we may be unable to manufacture products with sufficiently low cost to offer them at competitive prices or with acceptable margins; the rapid development of new technology and competing products that may impair demand or render our products obsolete; the potential lack of customer acceptance for the products; variations in demand for Cree's products and its customers' products; and other factors discussed in Cree’s filings with the Securities and Exchange Commission, including its report on Form 10-K for the year ended June 24, 2007, and subsequent filings.
Contact:
Deb Lovig
Marketing Communications Manager
Cree, Inc.
[email protected]
(919) 287-7505
NIST Verifies Results
DURHAM, N.C., SEPTEMBER 13, 2007 — Cree, Inc. (Nasdaq: CREE), a leader in LED lighting components, today announced it has achieved R&D results of 129 lumens per watt for a cool-white LED and 99 lumens per watt for a warm-white LED. These are the best results reported for packaged, high-power LEDs, and they clearly indicate that Cree is extending its lead in solid-state lighting through its continued investments in LED technology.
The results have been verified by the National Institute of Standards and Technology (NIST). NIST’s tests confirmed that the cool-white (5,813 K) LED produced 135.7 lumens of light output and achieved 129 lumens per watt efficacy. The warm-white (2,950 K) LED produced 104.2 lumens of light output and achieved 99 lumens per watt efficacy. The institute tests LEDs at 350 mA and measures the output after five minutes of operation to ensure thermal stabilization.
In coming years, such investments in core LED technology could lead to products that replace traditional light sources in all commercial applications. Customers may see these technology advancements in commercial products within 12 to 24 months.
“To replace traditional light sources, LEDs need to provide both high light output and high efficacy,” comments John Edmond, Cree co-founder and director of advanced optoelectronics. “Cree continues to push the limits of LED performance in order to realize the potential of the LED lighting revolution – energy-efficient, long-lasting LED light.”
For more information on Cree high-power LEDs, please call (919) 313-5300 or visit www.cree.com.
About Cree, Inc.
Cree is a market-leading innovator and manufacturer of semiconductors and devices that enhance the value of solid-state lighting, power and communications products by significantly increasing their energy performance and efficiency. Key to Cree’s market advantage is its world-class materials expertise in silicon carbide (SiC) and gallium nitride (GaN) for chips and packaged devices that can handle more power in a smaller space while producing less heat than other available technologies, materials and products.
Cree drives its increased performance technology into multiple applications, including exciting alternatives in brighter and more-tunable light for general illumination, backlighting for more-vivid displays, optimized power management for high-current, switch-mode power supplies and variable-speed motors, and more-effective wireless infrastructure for data and voice communications. Cree customers range from innovative lighting-fixture makers to defense-related federal agencies.
Cree’s product families include blue and green LED chips, lighting LEDs, LEDs for backlighting, power-switching devices and radio-frequency/wireless devices. For additional product specifications please refer to www.cree.com.
This press release contains forward-looking statements involving risks and uncertainties, both known and unknown, that may cause actual results to differ materially from those indicated. Actual results may differ materially due to a number of factors, such as the risk we may be unable to develop and release commercial products with performance ratings comparable to the development results described above; the risk we may be unable to manufacture products with sufficiently low cost to offer them at competitive prices or with acceptable margins; the rapid development of new technology and competing products that may impair demand or render our products obsolete; the potential lack of customer acceptance for the products; variations in demand for Cree's products and its customers' products; and other factors discussed in Cree’s filings with the Securities and Exchange Commission, including its report on Form 10-K for the year ended June 24, 2007, and subsequent filings.
Contact:
Deb Lovig
Marketing Communications Manager
Cree, Inc.
[email protected]
(919) 287-7505
Soldato
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In realistic terms, how much heat do lightbulbs give off then?
I would think atleast half the energy.
Hence the savers are much cooler, they simply turn less electricity into heat.
Electricity is far more expensive that gas so I'd be happier with the central heating warming the house not the bulbs.
Soldato
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I switched all my house lights to LEDs - In all I spent about £170 pounds. I even wired 2 of the GU10s into each of our external security lights (which used to be 400Watts) - They are now running at 4Watts. I also started using an auto shutoff plug for stuff, and now use a solar light for under our stairs.
I got my first Electric bill in 3 weeks ago and I have reduced it to £57. The same quarter last year it was £98. Hoping to save an average £150 for the year.
My electric is only one of 8 savings I have addressed this year that is saving me over £2000 - so very well pleased.
The only real LED bulbs to go for are the ones based around the philips luxeon LEDs. They are very bright (and usually 1 or 3Watts) - Average life of 10-15 years, so well worth the expense. And everyone at work thought I was mad spending so much on bulbs at the start, but once I showed them my leccy bills, they are all asking me where I got them from & what types etc.
I got my first Electric bill in 3 weeks ago and I have reduced it to £57. The same quarter last year it was £98. Hoping to save an average £150 for the year.
My electric is only one of 8 savings I have addressed this year that is saving me over £2000 - so very well pleased.
The only real LED bulbs to go for are the ones based around the philips luxeon LEDs. They are very bright (and usually 1 or 3Watts) - Average life of 10-15 years, so well worth the expense. And everyone at work thought I was mad spending so much on bulbs at the start, but once I showed them my leccy bills, they are all asking me where I got them from & what types etc.
Last edited:
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New LED proclaimed 'world's brightest'
http://dataweek.co.za/news.aspx?pklNewsId=28299&pklCategoryID=39
Seoul Semiconductor has announced the development and commercial release of the ultra bright Z-Power P7 LED Series, claimed to deliver the world’s highest brightness of 900 lumens at 10 W. This means that the single-LED package produces more luminous flux than an average 60 W general residential incandescent lamp, which produces just 660 lumens. This results in an efficacy of 90 lumens per Watt from a single package, which is eight times higher than an incandescent lamp.
Comparison between P7 LED and 15 W compact fluorescent lamp
Comparison between P7 LED and 15 W compact fluorescent lamp
In addition, the P7 Series shows remarkable performance compared to compact fluorescent lamps (CFL). In a comparison with a CFL consuming 15 W and emitting light at 924 lumens, the CFL shows an efficacy of 61 lumens per watt, only 68% that of the P7 Series.
Another advantage is low light loss. General light sources, such as fluorescent lamps and incandescent lamps, emit in all directions and the light loss rate is high. This means that only 60% to 70% of light produced from these light sources is applied to illuminate an object. In contrast, a P7 LED is able to focus light in a specific direction based on the intended application. As a result, there is little loss of light generated from the source. These LEDs can be applied in many fields such as general residential lighting, streetlights, a variety of task lights, high-end flashlights for military, police or rugged use, and landscape lighting requiring extremely bright light.
http://dataweek.co.za/news.aspx?pklNewsId=28299&pklCategoryID=39
Seoul Semiconductor has announced the development and commercial release of the ultra bright Z-Power P7 LED Series, claimed to deliver the world’s highest brightness of 900 lumens at 10 W. This means that the single-LED package produces more luminous flux than an average 60 W general residential incandescent lamp, which produces just 660 lumens. This results in an efficacy of 90 lumens per Watt from a single package, which is eight times higher than an incandescent lamp.
Comparison between P7 LED and 15 W compact fluorescent lamp
Comparison between P7 LED and 15 W compact fluorescent lamp
In addition, the P7 Series shows remarkable performance compared to compact fluorescent lamps (CFL). In a comparison with a CFL consuming 15 W and emitting light at 924 lumens, the CFL shows an efficacy of 61 lumens per watt, only 68% that of the P7 Series.
Another advantage is low light loss. General light sources, such as fluorescent lamps and incandescent lamps, emit in all directions and the light loss rate is high. This means that only 60% to 70% of light produced from these light sources is applied to illuminate an object. In contrast, a P7 LED is able to focus light in a specific direction based on the intended application. As a result, there is little loss of light generated from the source. These LEDs can be applied in many fields such as general residential lighting, streetlights, a variety of task lights, high-end flashlights for military, police or rugged use, and landscape lighting requiring extremely bright light.
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Have you weighed up the actual benefit in cost to yourself and how long you would have to run them to pay for the outright cost? Or is this all about just going reener regardless of cost?
Soldato
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I read an article about light bulbs in New Scientist many weeks ago. There are companies developing LED bulbs as they convert about 70% of energy into light (if i remember correctly), but problem with is the light that is given off isn't 'soft' and 'natural' light like you would get from normal light bulbs. So they are coming up with coatings to filter the light so that it is less bright and looks a little more natural.
