300 lumens per watt by 2015

http://www.semiconductor.net/article/328092-Illumitex_Launches_Into_HB_LED_Market.php

We'll see, but looking at the chart, looks like we are already ahead of the curve!:twothumbs

Oi!

In this forum, we obey the laws of thermodynamics!

Edit: A retraction. RGB LEDs can go higher than 241 lm/W.

So why wouldn't this?

Yawn...whassup?...oh...nothing to see here.

Wake us up again when someone makes a real breakthrough in LED efficiency. Not just shuffling around the die size, package size, or optics.

Until then... :sleepy:

-Jeff

uplite said:

Yawn...whassup?...oh...nothing to see here.

Wake us up again when someone makes a real breakthrough in LED efficiency. Not just shuffling around the die size, package size, or optics.

Until then... :sleepy:

-Jeff

Click to expand...

???

Whatever they can do to get more light out of the LED package, I'm all ears.

Me too. I did read the article. It said that Illumitex "will begin production later this year, starting at 100 lumens at 300 mA".

Meanwhile the Cree XP-G is already in production, and it does 130 lumens at 350 mA.

:shrug: :sleepy:

-Jeff

Basically a news release nested in an article. Talk is cheap...

Not a violation of the laws of thermodynamics but 300 lm/W is really pushing them. If we think of blue plus phosphor, then the limit is roughly 270 lm/W (with a 100% efficient blue LED and minimum possible Stokes losses). Nichia recently managed 250 lm/W in the lab (at 20 mA), and claims 300 lm/W is possible with a new phosphor mix. 400 lm/W is theoretically possible with RGB LEDs but you'll need to get them 75% efficient to reach 300 lm/W. Blue is already there in the lab, but red and especially green have a way to go.

All that being said, yes, I think 300 lm/W will indeed happen eventually, but if it happens in 6 years I'll really be surprised.

I'm skeptical too. It gets more challenging as a theoretical limit is approached. I'm pretty amazed at what we already have today.

I wonder why red is so hard when they've been around the longest so should have had plenty of time to do the research.

Yes.The led light technology developed so quickly.