LED Lighting News

Plessey expands wearable LED line

Plessey has expanded its dotLED range, designed for wearable LED tech, by adding a wider selection of colours, including red, green and blue. “Our dotLED product range addresses the optical, mechanical and cost requirements for the typical wearable applications. These include wristbands trackers for health and fitness as well as…

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Narrow beam angles from small LED packages

Following research at Sheffield-based LED packaging firm Litecool, narrow beam angles from LED packages without secondary optics or reflectors look closer. The proof-of-concept device produced a beam with 50% of light in 36 degrees, and over 90% efficiency. “Most package manufacturers design their LED packages for maximum…

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Standard release for lighting LED-driver interface

The Module-Driver Interface Special Interest Group (MD-SIG) has released its specification for a universal electrical interface between LED lighting modules and their power supplies. The standard has the support of Osram, Panasonic, Philips and Tridonic. Called LEDset1 edition1.0, it is a three wire interface (see diagram): power…

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Cree squeezes 13W LED into XPH35 3.5x3.5mm package

Cree has added 50% more light output to its 3.5×3.5mm ‘XP’ format with the introduction of the four-junction XPH35 series. Something like 1,800 lm is available with the device turned up to its absolute maximum of 1.05A, when it typically drops something over 12.3V…

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LED-cooling dielectric beats copper in thermal conductivity

Dielectrics can conduct more heat than copper, claims Sheffield-based Litecool which achieves LED-cooling with a material it has branded Black X. “It is an incredible material. We have always assumed dielectric materials will hinder the thermal performance of our LED packages but this material actually improves it,” said…

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LED lighting driver tunes to ZigBee for control

Yorkshire LED lighting driver maker Harvard Engineering has added ZigBee wireless control to its range of lighting power supplies. The 33W driver, called CLZ and part of the firm’s CoolLED range, offers dimming down to 1% and includes a 2.4GHz radio – either built-in or remote (pictured). Radio…

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Sheffield firm slashes LED thermal resistance

Finding a way to deposit vertical dielectric barriers has allowed Litecool of Sheffield to make dramatic cut in LED thermal resistance – from 1.25 to 0.5°C/W is one case – see diagram. Dielectric layers are essential to separate electrical conductors but, with a few notable exceptions like diamond…

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Ikea invests in French GaN-based LED lighting firm

Ikea’s venture capital arm has invested in a French firm developing and manufacturing 3D LEDs. Grenoble-based Aledia is developing LEDs  for lighting based on a gallium-nitride-on-silicon technology. Ikea believes there is this low-price LED lighting technology for residential use has the potential of faster…

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