LEDs ♦ news digest
BEKA LEDlume with Oslon SSL LED by Osram Opto offer energy-efficient and long lasting street lighting
They are particularly compact, with housing dimensions measuring three by three millimetres, and thus enable a great variety of design possibilities. With a light colour of 4,500 K and a colour rendering index (CRI) of 70, the luminaires ensure pleasant light conditions on the streets of Africa.
An additional benefit of the modern LED street lighting is the high efficiency of Oslon light diodes, their light yields more than 100 lm/W at 350mA. As a result of this, Osram reckons that the BEKA LEDlume uses approximately 50 percent less energy than the technology that has been applied so far.
Optionally, the BEKA LEDlume can also be furnished with the ambient light sensor SFH5711 by Osram Opto, which automatically adapts the brightness of the luminaires to the ambient light or to customer-specified preferences. So, by dimming or intelligent switching of the luminaires on or off, even more energy can be saved.
BEKA LEDlume is available in numerous versions – ranging from 16 to 90W power consumption. Depending on the version, 12 to 60 Oslon SSL LEDs per luminaire are required. Thus, the street lights comply perfectly with the special requirements of the African continent. For instance, the 12 and 24 volt versions are also suited for operation with solar power.
What’s more, the special thermal conditions of the continent have also been taken into account: the luminaires are designed for ambient temperatures of 35 degrees Celsius, and as a result, in spite of the high temperatures, the durability of the LED is not affected. Lasting more than 50,000 hours, the average durability of the LED also complies with the L80 Standard. This means that once the service life of the luminaire has expired, it will still generate more than 80 percent of the original brightness.
Ryan Hunt, Country Manager at Osram Opto Semiconductors in South Africa, commented on the renewed co-operation with BEKA, “We are very happy that BEKA has decided to use our Oslon SSL LED in their BEKA LEDlume. The consistently
high quality of our products, as well as our good relationship with BEKA, is what this project and many other joint projects have been based on.”
Nanyang Tech University deploys Aixtron system for LED research
Apart from being used for gallium nitride research for solid state lighting applications, the CCS will provide a teaching facility for school students in becoming familiar with MOCVD technology.
Aixtron SE has announced that Nanyang Technological University (NTU) Singapore, has received its new Close Coupled Showerhead (CCS) system.
Commissioned by the local Aixtron support team, the CCS 3x2-inch wafer configuration system is being used for research into ultra-high brightness LEDs and related material systems.
Director of Luminous! Centre of Excellence for Semiconductor Lighting and Displays and Singapore NRF Fellow, Nanyang Associate Professor Hilmi Volkan Demir comments, “We have established a solid-state lighting (SSL) lab to develop cost-saving, green solutions to generate and harvest light. Already we have fabricated and tested nanostructured white LEDs of nanocrystal quantum dot emitters for high quality mesopic SSL. Areas where the CCS system will be absolutely vital include III-N epitaxy, doping engineering and epitaxial growth optimisation as well as colour- converting LEDs with high scotopic/photopic ratio.”
He continues, “So we are looking to apply our new Aixtron system to some fairly challenging but highly promising areas of lighting development. My team is already familiar with the high technical standard of this equipment and has great trust in the excellent Aixtron local support, so I think we can be sure all our enquiries will be dealt with efficiently.”
“Moreover, as well as being dedicated to GaN LED research, the CCS will provide a much needed teaching facility for our school students getting familiar with MOCVD technology. So, in more than one way the CCS is already proving its usefulness
November/December 2011
www.compoundsemiconductor.net 83
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