LED Luminaries

LED news and insight from our technology editor Steve Bush, who has been messing with LED lighting for more years than he would care to remember.

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Better photos of Cree light guides

Cree has got in touch to send some closer photos of the new light guides it is using in its own-brand LN (office) and IG (garage) luminaires.

Electronics Weekly has requested more information on what makes the technology unique.




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Data over mains for led lighting

‘ready2mains’ is an over-mains dimming scheme from driver maker Tridonic.

So – sophisticated dimming can be added despite no modifications to existing wiring.

Its TalexxConverter Premium driver have it built in – the 100W one, for example, can dim from 1-100% using ready2mains

This unit consumes 150mW standby power – not…

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For Museums and retail

For Museums and retail, Ledil’s 700 Olivia-S is designed to produce beams with typical FWHM of 15-20°, subject to the LES size (up to 19mm).

‘S’ is for spot, and it will soon be joined by some wide beam versions.

Fresnel/folding optics keeps height below 23mm…

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Lumileds 6.5mm CoBs reach 1,100 lm at 110 lm/W

Lumileds has pushed up the power of its 6.5mm diameter emission CoB leds, aiming them at PAR, GU10 and MR16 lamps.

Called ’109′ CoBs, they are part of the firm’s 12x15mm Compact CoB family, this time specified at 250mA (35.5V nominal 1.5°C/W). 

Others 12x15mm…

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Etendue giving you trouble?

A single die led that can deliver over 100,000cd running at 10W from a 50mm diameter optic has been announced by Cree.

It is a lens-less version of its 3.45 x 3.45mm XP-L – with lens-less designs generally trading a little efficacy for intensity. 


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Cree makes a fuss about light guides

 Cree has announced a light guide technology branded ‘WaveMax’.

And that is about all that has been said.

It has ‘DiamondFacet’ optical elements, achieves “up to 90 percent optical efficiency” and is used in the firm’s LN (office) and IG (garage) luminaires.

No you know as much as anyone…

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Luminus chases ceramic metal halide

Luminus want a slice of retail lighting with its XH series CoBs.

Right now I am struggling to find much more information. What I have is on the Electronics Weekly news site.

If you are at Lightfair, I suspect Luminus will tell you all you need to know.


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No-solder package will approach 150 lm/W

It is not often you hear of a new packaging concept for LEDs.

Three days ago Litecool of Sheffield got patents for an adhesive-backed one – that can be pick-and-placed straight onto a heatsink.

Carclo 10mm lenses can be places straight on top.

Not only that, but it…

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Where are the rectangular die?

If optic diameter is important, forming letter-box beams is such a struggle, that the likes of Lumileds, Cree and Osram should make some nice rectangular die.

Only my opinion of course, fuelled by my attempts to make anti-dazzle bicycle lights, but I am sure designers of wall-washers…

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SMD leds for automotive light guides

Osram has introduced a range of leds for feeding light guides in automotive external lighting.

All the packages have the same 2.7 x 2.0 x 0.6mm external characteristics, despite the range of die colours and die sizes available.

Called Synios P 2720, the family is aimed at…

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