Tech news tagged ‘efficiency’

Osram LEDs approach theoretical Vf limit

According to Osram Opto, its blue die are approaching the theoretical limit for forward voltage.

Having shaved 20mV off from production leds last summer “In the laboratory we have already succeeded in further reducing the forward voltage by as much as 30mV”, said Osram scientist Dr Joachim Hertkorn. “Any further…

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Ledil introduces 12 way lenses

Ledil’s Sandra family of lens fit arrays of 12 LEDs. Efficiency is over 90% and there three different beams: spot, medium and wide, with angles between +/-5°, +/-12°, +/-16° and +/-17…

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A guide to costing LEDs

Our Technology Editor Steve Bush has added anotherr to his series of ‘Big Guides’ to LED technology. His latest covers the issues of costing LEDs. He begins: Power LED makers have made great efforts to understand the needs of the lighting industry, resulting in a range of products which may…

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The Queen’s Awards For Enterprise: Innovation 2011

Here’s a toast to the success of Brandon Medical Company, based in West Yorkshire. The company has won a Queen’s Award and is cited as providing “LED lighting with efficiency and near-perfect colour rendition.” There are Awards for Enterprise in three classes – International Trade, Innovation, and Sustainable…

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Sunpower indoor LED driver is triac dimmable

Sunpower’s indoor LED driver can be dimmed with the type of dimmer aimed at incandescent bulbs. Dimming range is claimed to be 1-100%, but will be less with poor quality dimmers. Output is 9-24V at 700mA, or nominally 16W, input is 220-240V at 50-60Hz with…

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Cree announces XLamp XM lighting-class LED

Cree has announced another lighting-class LED, the XLamp XM.

“This single chip LED delivers 160 lm/W at 350mA” claimed the firm. “The LED also delivers 750 lm at 2A, which is equivalent to the light output of a 60W incandescent light bulb at less than 7W.”

160 lm…

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Site update: Researchers design power LED retaining efficiency at high current

An LED-related article has just been posted on Electronics Weekly: Rensselaer designs power LED retaining efficiency at high currentThe US Rensselaer Polytechnic Institute has designed a power LED that retains efficiency at high current. “The device achieves a notable reduction in efficiency droop, a well-known phenomenon that provokes…

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