Looks like its better than an R2!?

[saabluster]

Or not.... Just found this article . It says that it does 250 lumens @700mA! WOW! I hope this wasn't a misprint. I also found it interesting that they use a diamond heat spreader in between the die and aluminum but it still has a thermal resistance of 11K/W.:thinking: It also seems to strangely do only 50lm/W. Must have a high forward voltage. Come to think of it this(250lm@700mA) sounds to good to be true. I'm thinking it may be a multi-die LED.

 

[VidPro]

250 lm @ 700 mA and offer optical efficiency of 50 lm/W
this part would make sence really quick if it was just like a Lux5 , with the series. and the 7V Vf.

700ma x the 7V = the 5 Watts
250 divided by the 5 watts = 50 lumens

it all comes together in my rotten math its series gates like a LUX5

with the better heat transfer, which the lux5 didnt have, it probably will survive time better, or even be able to be overdriven a little like they are saying, it just doesnt seem to use the latests wizz bang light extraction methods of the new leds. its a dueal or quad die.

 

[VidPro]

http://www.everlight.com/upload/product_pdf/EHP-B03LS-UT04-P05-TR.pdf
there it is, its a quad die according to the pics in the spec sheet.

 

[evan9162]

More creative marketing. 250 lumens is the maximum flux of their highest bin. Typical values are 190 lumens at 700mA.

 

[monkeyboy]

More creative marketing. 250 lumens is the maximum flux of their highest bin. Typical values are 190 lumens at 700mA.

That's no better than a high bin luxeon V

 

[saabluster]

More creative marketing.

I agree. And what really worries me is that it appears to only have a life of 1000 hrs. If this is true it really hacks me off that they would even make these. If companies use these in lighting fixtures and they fail in 1000hrs how is the consumer going to feel about buying anything else LED based? Not that I think it will affect the LED market long term. Still .

 

[evan9162]

LEDs are a lucrative market right now. It attracts genuine competitors; but also plenty of hacks who are trying to cash in on a popular new product.

You can see the same thing with digital cameras and digital music players. Some of the cheap crap out there is appalling, especially the stuff that mimics existing, successful products.

The lifetime really is the worst part - the "article" (which is nothing more than a reprint of the company press release) emphasizes fixed lighting usage for these - something that you expect more reliability from than a portable lighting solution. At least when Lumileds found that the white Luxeon V had a shortened lifespan, they redirected people to using it in "portable" applications (where a bulb lifespan is already very short). Still not the best, but more honest than what appears to be happening here.

Another thing this brings to light are these so called "trade journals". I'm sure it's the same in every industry, but most of the LED trade journals just seem to be marketing sounding boards for the LED manufacturers. It would be nice to see some actual commentary from experts in the field pointing these things out. Of course, that would likely be detrimental to the journal since any seemingly negative press or comparisons to competitor products would likely result in manufacturers pulling back from those journals. It's just frustrating to see the same article verbatim published across multiple "trade journals" without any commentary or whatnot. Just seems like mindless pass-through advertising. I would expect more from a trade journal.

 

[saabluster]

most of the LED trade journals just seem to be marketing sounding boards for the LED manufacturers. It would be nice to see some actual commentary from experts in the field pointing these things out. Of course, that would likely be detrimental to the journal since any seemingly negative press or comparisons to competitor products would likely result in manufacturers pulling back from those journals.

I've been frustrated by the same thing. You can tell 80% of the "news" is just fluff in an attempt to either raise their stock price or attract investors. And of course the average person has no idea what the real truth is. To run a proper journal would take someone who knows the industry and the product. So with that in mind I think you should do it Evan. As far as the manufacturers pulling back do they have the right to say you cannot post their press release?