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Comment by James Highgate on March 12, 2011 at 9:28pm

See all of the latest LED technology at The LED Show - July 27, 2011 Las Vegas http://www.theledshow.com

Comment by Abbe westerlundh on April 14, 2010 at 4:27am

In my opinion as long as the efficiency of the optics for collimating a LED source is on the current level, we will not see that much of interesting developments for Stage Lighting. Latest example is Martin Entour 350 witch is a very nice try but not MORE efficient than a discharge lamp.
Witch is why we work with LED solutions anyway right?

Comment by Jeffrey Beaver on February 20, 2010 at 9:32am

I would caution all discussing the laboratory results to be wary of thinking that those lumens per watt will be available today. In laboratory testing, chips suppliers will do what is called flash testing, that is, pulse feeding high milliamperage through the chips and measuring how many lumens are emitted. Sustained lumens is yet another beast altogether. Cree, Samsung, Nichia, Samsung and many others are usually pretty good about being honest about sustained lumens but these claims are not usually translateable to finished product as many different factors contribute to lumen loss before delivering lumens to the workplane. driver efficiencies, optical loss, thermal limitations, etc... These lab lumens are usually not even shippable to manufacturers for at least a year, at best, after discovery. So just a word to the wise. Understand the details of the claim.

Comment by Agustin on September 9, 2009 at 8:18pm

hello friends, I invite you to go see my photos and my videos. this is the LED screen that did, are home care in my garage. Greetings

Comment by Bob Hunter on May 20, 2009 at 4:04pm

http://www.philipslumileds.com/newsandevents/releases/PR110.pdf

Phillips' press release. Philips Lumileds has released LUXEON Rebel ES, the world’s first
high-efficacy power LED specified to deliver a minimum of 100 lumens per watt.

Comment by Dennis J Solomon on May 17, 2009 at 4:36pm

Most LED die have a maximum power density per acres and a most efficient one - with the latter being about 35% of the former. With 'White' LEDs, the efficiency of the fluors is a major factor. Vari-lite just introduced a seven-lensed LED wash - Anyone have the specs?

Dennis

Comment by Bob Hunter on May 5, 2009 at 4:47pm

EDIT: A 100 watt bulb is more like 10-20 LPW. A compact flourescent is in the 50-70 LPW range.

Bob

Comment by Bob Hunter on May 5, 2009 at 4:42pm

CREE has said that it has produced a white light LED with 131 LPW rating.

http://www.dvorak.org/blog/2006/06/21/new-record-for-led-lumens-per-watt-the-end-is-near/

Man, I bet the heat sinks on that thing are huge. From what I understand, the typical benchmark measurements are at 1 foot. Also, practically all measurements are "initial Lumens" meaning what the light produces when first lit. What the unit will reproduce on a daily basis is usually quite a bit less than that. As much as 25-30% less. With the generic 100 watt light bulb producing something like 50-70 LPW; after the chip has run a while, it'll have settled into something like 70-80 LPW. It is interesting though; now if they can syphon off the heat from the circuit boards and keep the failure rate down, they'll be onto something. Right now, with that much current flow, their biggest enemy is heat.

Comment by Richard Cadena on May 3, 2009 at 1:56pm

100 lumens per watt is like the Dow Jones Industrial Average breaking 10,000 - it's a benchmark for lighting. But unless I'm missing something this PR doesn't give a lot of details about the benchmark - how it was measured, what the conditions are, whether it's white LEDs or some other color, etc. Still, it's interesting.