10 March 2011

Osram Opto’s OSLON SSL LEDs power street lighting for three Beijing districts

As part of the Chinese ‘10 cities 10,000 lights’ project, three districts in the capital Beijing have been equipped with LED street luminaires made by the HBTechnology CAST Group using OSLON SSL LEDs from Osram Opto Semiconductors GmbH of Regensburg, Germany, ensuring that the busy streets are brightly lit and saving up to 50% in energy compared with conventional luminaires, it is reckoned.

Picture: Three urban districts in Beijing now have LED street lighting.

In some parts of Beijing, LED modules for street luminaires with an output of 120W or 180W now replace the conventional 250W or 400W sodium vapour lamps. These urban districts hence achieve energy savings in street lighting of up to 50%. This is of great importance for the high energy consumption in the metropolis of Beijing, says Osram Opto. In addition to energy efficiency, light quality also played a major role in the decision for conversion. Since the Dong Cheng, Chao Yang and Da Xing are urban districts bustling with life, excellent illumination was required to increase safety for both drivers and pedestrians.

Osram Opto claims that, among 1W-class LEDs on the market, its OSLON SSL LEDs are the smallest (just 3mm x 3mm) and have the greatest luminous efficacy, working reliably and efficiently even at higher flux rates.

OSLON SSL LEDs have a beam angle of 80º (specifically 120º x 80º for this application) and are thus suited to street lighting. “The LEDs meet all of our technical requirements, and we have no problems integrating them into the external lenses,” says HBTechnology CAST Group's managing director Bing Hu. “The result is homogeneous and powerful illumination of the streets without light pollution,” he adds. “The long lifespan of OSLON SSL LED also results in lower maintenance requirements, which might otherwise have obstructed the flow of traffic and generated additional costs.”

Osram Opto says that, due especially to their capability for handling high current loads, OSLON SSL LEDs can be used to realize particularly energy- and cost-saving lighting solutions. At an operating current of 350mA, the light source achieves a typical brightness of 110lm in ultra-white (5700 and 6500K). At a color temperature of 3000K it achieves a typical efficiency of 82lm/W and a brightness of 92lm. Also, brightness is as much as 156lm (warm white) at an operating current of 700mA. “This allows us to realize lighting applications requiring a lot of light by using fewer LEDs,” says Kai-chong Cheng, marketing director at Osram Opto Semiconductors in Asia. “If, as planned, Beijing converts all of its street lighting to LED, the savings potential is enormous.”

China is the leading market in LED street lighting, representing about 50% of applications worldwide. The pilot project in the capital is to be followed by other cities.

Tags: Osram Opto OSLON SSL LED street lighting

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