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    Power: 5W , Luminous flux: 290 and 310lm , Light Source : Itswell , Socket: GU10 , CRI>75, BeamAngle:140deg,CCT:2800K/4000K/5750K,, Voltage:180-240V,Dimmability: Dimmable available

     

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    Power: 5W , Luminous flux: 286 and 324lm , Chip: SHARP COB , Socket: GU10 , CRI>80,R9=12, Beam Angle: 36deg ,CCT:2700K/4000K, Voltage : 180-260V , Dimmability: Dimmable available

     

    citizen cob ar111 gu10 15w 230v

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    Newest heat management lifespan is longer,exclusive lighting design,the light shade is much perfect.

    Power: 4W , Luminous flux: 330 and 400lm ,E12 E14 E27 E26 B22 Base,CCT:2500K/2700K/4000K/5500K ,Chip:OSRAM LED,Beam Angle:360°; CRI>92 ,Voltage : 180-240V.

     

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    Anti-glare design,high CRI and similar as traditional halogen lighting can creat a very good lighting environment.

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News Center

Rensselaer researchers boost green LED efficiency

Research at Rensselaer Polytechnic Institute leverages a nanoscale pattern to boost the optical efficiency of green Leds in the lab.
Green LED efficiency has long lagged behind the capabilities of red and blue devices, but researchers at the Rensselaer Polytechnic Institute (RPI) have reported significant improvements in the lab. The team is forming nanoscale patterns on a sapphire substrate that boosts light extraction, internal efficiency, and light output.
More efficient green LEDs would benefit both solid-state Lighting (SSL) in general-illumination applications and TV and display technology. Equally efficient red, green, and blue (RGB) LEDs could yield white light for illumination and could improve the color gamut in display or TV applications.

Some early led backlights for TVs utilized RGB LEDs, but the designs generally had to include two green LEDs for every red and blue one - adding significant expense and power consumption to the design. Likewise, RGB LEDs have been used in lighting but the need for extra green LEDs limits the applicability.
Green LED inefficiency stems from a semiconductor physics phenomenon called the charge separation effect. In green LEDs, electrons and electron holes are separated in the quantum-well region of the device. Light is generated when electrons combine with electron holes, but the separation results in fewer such combinations in green LEDs. Researchers have struggled for years with the problem.
Christian Wetzel, Professor of Physics and the Wellfleet Constellation Professor of Future Chips at RPI, is leading the green LED research team. The team etched a nanoscale pattern between the sapphire substrate and the gallium nitride (GaN) material in which the LED is grown.
The team reports a doubling in the internal quantum efficiency of the LED. Moreover, the design enhances light extraction by a factor of 58%. The result could be brighter green LEDs although its unclear how soon the research could be applied in LED production.
"Every computer monitor and television produces its picture by using red, blue, and green. We already have powerful, inexpensive red and blue LEDs. Once we develop a similar green LED, it should lead to a new generation of high-performance, energy-efficient display and illumination devices. This new research finding is an important step in the right direction," said Wetzel. "Green LEDs are proving much more challenging to create than academia and the industry ever imagined."
The research team published the results of its work in a paper entitled "Defect-reduced green GaInN/GaN light-emitting diode on nanopatterned sapphire" that was published in the Virtual Journal of Nanoscale Science & Technology.
Wetzel's team was supported by the US Department of Energy, National Energy Technology Laboratory (NETL) Solid-State Lighting Contract of Directed Research, and the National Science Foundation (NSF) Smart Lighting Engineering Research Center (ERC), which is led by Rensselaer.

 

 

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Product Catagory

opening tag MR16 LED Spotlight
           GU10 LED Spotlight
           E27 LED Spotlight
           E14 LED Spotlight
           LED Downlight
           LED Candle Lightclosing tag

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Hotsell Products

Hotsell in europe,most popular led light in europe.Each style has their unique features,they always can create a warm atmosphoere.