Philips Lumileds announces workhorse Luxeon T LED family (Updated)

Philips Lumileds has introduced the new Luxeon T series of high-power LEDs that target solid-state lighting (SSL) applications with directional-beam requirements including downlights, and MR16 and PAR retrofit lamps. The LEDs set new efficacy milestones for Lumileds achieving 140 lm/W at 350 mA of drive current. CEO Pierre Yves Lesaicherre touted the benefits of the new family, discussed Lumileds LED manufacturing technology, and commented on the development of the lime-green LED that was critical to the recent launch of the color-tunable Hue lamp by Philips lighting.

Philips Lumileds Luxeon T
Philips Lumileds Luxeon T

Lesaicherre emphasized that Lumileds considers the Luxeon T much more than an evolution of the Lumileds family saying, "The Luxeon T is going to be the workhorse in terms of high efficacy." Clearly Lumileds expects Luxeon T to be the product of choice for applications in which the LED is expected to produce maximum forward light.

Lumileds claims several breakthroughs for the new series beyond efficacy, including what it says is an industry-lowest 2.7V forward voltage and 3°C/W thermal resistance. Product line director Kathleen Hartnett said that only one other LED maker has reached 2.8V and that most are at 3V or above. The lower forward voltage simplifies the thermal design – especially critical in space-constrained directional lamps such as MR16 retrofits.

Lumileds will offer the LEDs in 3-step MacAdam ellipse bins, tested at 85°C. Lesaicherre said that the company is not matching phosphor tiles with emitters the way it did in the original Rebel Lumiramic-based LEDs to reach the tight binning, but instead controlling the epitaxial (epi) process more tightly. "We've narrowed the epi distribution to 1 to 2 bins," said Lesaicherre .

Epitaxial improvements

Indeed, better process control is behind both the binning and the lower forward voltage. Lesaicherre said, "The conversion to 6-in substrates has really helped because we have more modern equipment." Specifically, he said they have tighter control of temperature and gas distribution in the epi process.

"We change our epi recipe every six months on average," said Lesaicherre. The Luxeon T is made with the latest recipe. Moreover, the company developed chip-architectural and packaging enhancements to maximize light output and efficacy.

The new family utilizes a chip-in-frame package with a tightly coupled optical dome. The combination of a small 2-mm2 emitting surface and properly sized dome is critical in directional applications. For more detail on that topic, see our recent article, "Design considerations for enhancing LED efficiency."

The LED package measures 3.7×3.7 mm. The prior Luxeon A product targeted similar applications but features a rectangular pattern. Hartnett said the package design minimizes the footprint and allows the LEDs to be packed more closely together. The company has used the same package in the multi-emitter Luxeon M family.

The new LEDs offer a minimum CRI of 80, and optionally a CRI of 95, across the full range of CCTs, including 2700K, 3000K, 3500K, 4000K, and 5000K. The 140-lm/W efficacy achievement is at the cooler end of the color temperature range. But the family performs well in warmer temperatures as well. At 3000K, Luxeon T delivers 218 lm and 112 lm/W at 700mA, and 119 lm and 125 lm/W at 350 mA – both at 85°C.

With the high minimum, the LEDs will primarily find use in indoor lighting. Expect a complementary product with a lower CRI for outdoor applications down the road.

The Luxeon T design in aggregate is a good match for the target directional applications. "Luxeon T is able to deliver high center beam candle power and precise optical control, which are required to deliver the narrow beams desired for these systems."

Hue's lime-green LED

We used the chanced to interview the Lumileds executives to ask other questions as well such as for details on the mysterious lime-green LED that is presumably very important to the function of the Philips Lighting Hue lamp. Lesaicherre was guarded with details but said that Lumileds had advanced the efficacy of green LEDs that in general has trailed other colored LEDs industry wide.

Reportedly the lamp uses five of the lime-green LEDs, four red LEDs, and 2 blue LEDs. That means that the green LED is approaching the efficacy of the red ones.

The lime-green color itself was not the source of the efficacy gain. Instead, that lime-green LED better enables the mixture to deliver the full color-tunable range according to Hartnett. Lumileds does plan to offer a lime-green LED commercially, but is still mulling over plans as to which Luxeon family in which it will launch the product.

Low to high power

Given the emphasis Lumileds is placing on Luxeon T, we also asked Lesaicherre about the expectations going forward of whether SSL developers will focus on high-power LEDs or use the low- and mid-power devices that were originally developed for the backlighting industry. Read "LED makers broaden product lines to match application requirements" for background on the segments.

Lesaicherre said, "The mid-power segment is emerging faster than anyone had expected." The greater lumen output in the newest mid-power devices is exciting according to Lesaicherre. He added, "In mid power, the lumen per dollar is hard to ignore."

Still, Lesaicherre expects application requirements to drive the choice. He said mid-power LEDs will do well in omnidirectional products such as standard A-lamps, and that the low-power LEDs are a good match for linear lighting. He expects directional indoor and outdoor applications to continue to be almost exclusively based on high-power LEDs – both single emitter LEDs and chip-on-board (COB) arrays.

RELATED COMPANIES

Cree Inc

Leads the LED industry in performance, brightness and reliability with its XLamp LED family, enabling the lighting industry with efficient, environmentally-friendly LEDs that produce beau...

Zierick Manufacturing Corp

Offers innovative solutions for interconnect applications. Specializes in wire-to-board and board-to-board applications. Provides surface mount and thru-hole products while further reduci...

InnoLight sp zoo

EU located lighting manufacturer for LED GU10 5W 600lm CRI>80 reflector, great performance, and LED E27 5W 380lm classic traditional appearance.

Energy Efficient Lighting

Energy Efficient Lighting offers total solutions to both conventional and more advanced LED lighting fixtures and LED retrofit kits for commercial and industrial applications.

Signcomplex Ltd

Signcomplex Limited was founded in 2006, certified with ISO9001:2000 management system. We has 260 employees currently and fabrication area 6,000 square meters. Advanced and professi...

Barthelme LED Solutions

Offers two main product lines, LED Solutions and general lighting, we not only enjoy an excellent reputation, our customers also benefit from our many years of professional and comprehens...

Go Green Solutions

Go Green Solutions® Established America’s 1st Reusable LED Light Bulb. A T8 and T12 replacement for the modern day fluorescent.Our goal is to shed light on sustainability.

Schréder

48 companies worldwide, passionate about light and innovation, experts in developing LED lighting solutions for safe and comfortable environments with significant energy and cost savings,...

LTF LLC

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

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...

Lumentra Inc

Provides NVLAP accredited optical (photometry, colorimetry, Lumen maintenance), thermal (mapping and transient analysis), electrical characterization services, product development, supply...

LEDSAmerica Inc

LedsAmerica is a full line LED line company and has manufacturing in Iowa where T8 LED-O tubes and street lights are made together with PL, PARs, High Bay lights. MAx

Colorimetry Research

Specializes in the field of optics, manufacturing, electronics and software enables us engineer products with the right balance of hardware and software.

Illumination Machines

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

Cirrus Logic Inc

Cirrus Logic develops high-precision, analog and mixed-signal integrated circuits for a broad range of innovative customers across a variety of energy-related applications, including the ...

L-3 Communications - Applied Optics Center

0energyLIGHTING Inc

Epoxy Technology Inc

Epoxy Technology manufactures and custom formulates epoxy adhesives; specializing in adhesives for LED assembly and manufacturing. EPO-TEK® offers a complete line of electrically conducti...

Haichang Optotech Co Ltd

Professional Manufacturer and exporter of indoor and outdoor LED display,LED Panel light,LED Tube light,LED downlight, MR16/GU10/AR111 LED bulb, Par20/Par30/Par38 LED lamp, LED strip ligh...

Shin-Etsu Silicones of America

Shin-Etsu Silicones of America Inc. offers vast technical and capital resources to formulate solutions as a major supplier of silicone materials - delivering a broad spectrum of silicone ...

RELATED PRODUCTS

Cree XLamp® XP-L LEDs-the industry’s highest efficacy single-die LED.

Cree® XP-L LED is the first commercially available single-die LED to achieve up to 200LPW at 350mA. The XP-L enables 50% or more performance increase as a drop-in upgrade.

Surface Mount Wire Gripper - Part Number 1301

The Zierick 1301 is designed to allow customers to easier terminate a stripped wire to a PCB. Wire sizes to 24 AWG. Terminal is UL Recognized.

Unlock new LED lighting solutions with Cree High Density LEDs

Cree® High Density LEDs deliver the industry’s highest optical control factor enabling lighting manufacturers to improve performance, cost and size of LED lighting—enabling never before p...

Cree CXA LED Array Family

Cree’s CXA LED Arrays are optimized to simplify design and lower system cost, delivering high lumen output and efficacy with a family of single, easy-to-use arrays.

Cree LED Modules

Cree LED modules deliver beautiful, consistent light, backed by a 5-year warranty. They offer a choice of dimming options, while reducing the lighting power load by 80%.

Surface Mount Wire Gripper - Part Number 1262

The Zierick 1262 is designed to allow customers to easier terminate a stripped wire to a PCB. Wire sizes from 0.025" to 0.095". Terminal is UL Recognized.

Cree XLamp® XM-L2 EasyWhite® LED

The first 5mmx5mm LED to enable color-consistent 50W halogen performance; the XM-L2 EasyWhite delivers 1,100 lumens and is optimized to replace halogen technology.

Surface Mount Insulation Piercing Terminals

Surface Mount Wire-to-Board terminals available for wire gauges ranging from 24 to 14 AWG. Parts can be terminated to allow daisy-chain applications. Eliminates difficulty with direct...

LED flexible strip and aluminum LED bar

Full range of LED strip and bar including the unique high lumen strip. Protection degree up to IP68.Epistar 3528/5050 SMD LED.Compliant with CE & RoHS.2-year warranty.3528: 60LED/m,120LED...

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...

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 ...

Solar LED Paver Light

100% solor powered.No wires, no electricians.Super capacitors instead of battery,maintenance-free.Absorb sunlight in daytime and illuminate 8-12 hours during night. Epistar LED.Activation...

LED light Bulb – LED spotlight

The AR111,GU10,MR16,PAR30,PAR38 LED bulbs are ideal replacement of 10-75W halogen or CFL bulbs.Cree/Everlight LEDs.PMMA lens.Aluminum housing.Good heat dissipation.Surface temperature les...

T8 LED tube light

Epistar Super bright 3528/2835 SMD LED.Aluminum alloy body with plastic cover.Consist with traditional fluorescent tubes.Easy mounting.PF>0.90,CRI>72,Over 60% energy-saving,Low degradatio...

Super bright Injection LED modules

Housed by ABS material,covered by epoxy resin on surface with good insulation.Beautiful appearance.Waterproof.Anti-fire.Super bright 5050/3528 LED.12V voltage.Ideal light source for backl...

Flexible LED screen - Rental and Stage LED billboard

Special design,flexible use,light weight,super slim,transparent,SMD technology,easy to install.Can realize any curved and creative installation horizontally and vertically.IP65 protection...

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...

Cree's "Power of One" LED Modules

Cree LED modules deliver beautiful, consistent light, backed by a 5-year warranty. They offer a choice of dimming options, while reducing the lighting power load by 80%.

Cree's XLamp XQ-D LEDs

Cree’s smallest lighting-class LEDs at 1.6mm x 1.6mm, the XLamp XQ-D LEDs deliver the unique combination of small size, reliability and novel light distribution.

X-tube™ fluorescent LED tube T8

X-Tube™ is an upgraded version CFL tube replacement with LED. It hasHigh brightness, 100lm/W, 3300lm for 150cm Compatible with existing ballast .One end power in, safety for installation.

TOPIC INDEX

CONNECT WITH US

                

SOCIAL ACTIVITY

UPCOMING EVENTS

  • List View

NEWSLETTERS

LEDs Magazine Newsletter

Our weekly flagship news source
SUBSCRIBE

Product Focus

Monthly newsletter
SUBSCRIBE

Illumination in Focus

Bi-monthly newsletter
SUBSCRIBE

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