Cree R&D achieves 161 lm/W for high-power LED

Cree, the US-based manufacturer of LEDs, LED chips and lighting fixtures, has reported its latest “hero” result for a high-power white LED.

The white LED, containing a 1 x 1 mm chip, had an efficacy of 161 lm/W, which is the highest value reported in the industry to date.

The device had an output of 173 lumens, and a color temperature of 4689K. The tests were conducted under standard LED test conditions (meaning an instantaneous rather than steady-state measurement) at a drive current of 350mA, at room temperature.

It is crucial to remember that this level of performance is not yet available in production LEDs. However, Cree says that it is shipping millions of 100+ lumen lighting-class XLamp LEDs.

Cree’s announcement follows similar results that have been publicized in recent months by Philips Lumileds and Osram Opto Semiconductors (see LED chips set new R&D records).

Lumileds’ results were 140.1 lm/W and 138 lm, while Osram’s were 136 lm/W and 155 lm, for comparable devices. However, the actual values are less important than the fact that all these companies (and others) continue to demonstrate continued improvement of LED performance, which will gradually filter through into production devices.

John Edmond, Cree co-founder and director of advanced optoelectronics, said "Cree is inventing, commercializing and delivering LED lighting innovations that aim to obsolete the energy-inefficient light bulb," said.

"Our advances in brightness and efficacy come from a focus on end-to-end innovation that can enable LED lighting to address growing numbers of lighting applications while saving energy, saving money and helping to protect the environment."

Meeting industry’s demand

In related news, Lumileds issued a press release this week to state that it has delivered tens of millions of Luxeon Rebel power LEDs, the vast majority of which are warm, neutral and cool white in color.

Lumileds said that it has “virtually unconstrained capacity” and ability to deliver its most powerful and efficient illumination-grade products, including those that deliver 100 or more lumens and efficacy greater than 90 lm/W.

The purpose of the press release appears to be to emphasize the importance of repeatable performance and availability; “New solid-state lighting applications are only made possible with a sustainable supply of power LEDs at specific and repeatable color temperatures,” said the company. In turn, this enables luminaire designers to produce “consistent color and uniform light output from luminaire to luminaire.”


Guardian Industries

Guardian Industries Corp. is a leader in float glass, fabricated glass and high performance coated glass products. Guardian lighting solutions deliver optimal performance, flexibility and...


LTF, LLC is a U.S based solid-state lighting product development and manufacturing company with facilities located in both USA and China.

Illumination Machines

Illumination Machines designs custom optics, heat sinks, and remote phosphor systems for LED luminaires and lamps.


P3 Indoor Full Color LED Display Video screen

High-density pixel pitch,high resolution,high refresh rate,magnificent and high-definition image and video effect.P3,P5,P6,P7.62 to P10 available.Epistar SMD LED,wide viewing angle.High r...

Rotatable LED Down Light, beam angle adjustable 10-60°

Beam angle adjustable 10-60 degree.Shell can rotate 360°,vertical 0-40°.High power CREE LED,even and uniform light output,Die casting aluminum alloy housing,good heat sinking.Widely used ...

LED Panel Light

Designed to replace T8 fluorescent tube or Phillip Grille light.Epistar 3528/3014 SMD LED.Aluminum alloy body.Even and Soft light beam.Various mounting means.50,000 hours lifetime.Environ...






  • List View


LEDs Magazine Newsletter

Our weekly flagship news source

Product Focus

Monthly newsletter

Illumination in Focus

Bi-monthly newsletter

Copyright © 2007-2014. PennWell Corporation, Tulsa, OK. All Rights Reserved.