Breaking News
News & Analysis

Cree claims LED price-performance breakthrough

2/7/2012 05:02 PM EST
25 comments
NO RATINGS
More Related Links
View Comments: Newest First | Oldest First | Threaded View
<<   <   Page 2 / 3   >   >>
DrQuine
User Rank
CEO
re: Cree claims LED price-performance breakthrough
DrQuine   2/11/2012 4:46:57 PM
NO RATINGS
Can we skip LED lights and go straight to 4 color diode laser white lights? "Photonics Spectra" (Jan 2012, page 20) reports that Sandia National Laboratory has produced white light that is superior in quality to current lighting technologies. They claim diode laser lights can also scale to brighter level than can be achieved with LEDs (which lose efficiency above 0.5 amp currents).

DrQuine
User Rank
CEO
re: Cree claims LED price-performance breakthrough
DrQuine   2/11/2012 4:37:44 PM
NO RATINGS
Can we believe lifetime estimates? When CFL bulbs were launched, they were touted as having 7 year lifetimes. Not including the infant mortality (5% of bulbs failed out of the box), I'd guess that 25% failed within a year. While they all got replaced at no cost, the mismatch between reported and actual lifetimes was striking. At least the CFL bulbs were cheap. LED bulbs are not.

Sanjib.A
User Rank
CEO
re: Cree claims LED price-performance breakthrough
Sanjib.A   2/11/2012 3:32:44 PM
NO RATINGS
I agree with you to some extent. I am concerned that in the cost sensitive regions of the world (e.g. India) it might take some more time to accept the LED lamps. Going with the experience with the CFL lamps: the CFL lamps were costly (they are still) when launched compared to incandescent lamps or the fluorescent lamps, but over last 5-7 years CFL lamps have become popular in India. It was partly because of your logic, some people were not so cost obsessive, may be because the cost of CFL lamps justified over the energy saving over the incandescent lamps…some due to the spreading of the awareness, marketing etc. But the cost of LED lamps is too high compared to the benefits that could be explained to these people.

Sakthidaran, R.T.
User Rank
Rookie
re: Cree claims LED price-performance breakthrough
Sakthidaran, R.T.   2/11/2012 10:14:12 AM
NO RATINGS
Cree 231 Lumen Per Watt LED Shatters LED Efficacy Records – was the news reported on May 9, 2011. http://www.cree.com/press/press_detail.asp?i=1304945651119 Now, it reports 148 LPW as an achievement. ???

Bert22306
User Rank
CEO
re: Cree claims LED price-performance breakthrough
Bert22306   2/8/2012 9:45:24 PM
NO RATINGS
Good point. Also because, LEDs tend to become gradually dimmer with age. Although this happens so gradually that people don't usually notice. So "lifetime" needs to consider replacement just because of lost lumens. We have noticed this dimming over time with CFLs, more pronounced in the ones with very small twisty part, enclosed in a light bulb-like glass cover.

BicycleBill
User Rank
Rookie
re: Cree claims LED price-performance breakthrough
BicycleBill   2/8/2012 9:38:22 PM
NO RATINGS
How accurate/reliable/meaningful are the tests used to project overall lifetime, I wonder?

prabhakar_deosthali
User Rank
CEO
re: Cree claims LED price-performance breakthrough
prabhakar_deosthali   2/8/2012 12:33:50 PM
NO RATINGS
The LEDs are supposed to have a life of 25 years. If the associated electronics also lasts that long then LEDs will become a good lifetime investment for lighting and saving a huge amount of energy cost over their lifetime

daleste
User Rank
CEO
re: Cree claims LED price-performance breakthrough
daleste   2/8/2012 3:04:48 AM
NO RATINGS
This is a good advancement. The move to LED lighting will happen once it is better (cheaper) than what is available. The price of LED bulbs will continue to come down as the volume increases and the advancements in the science continue. I look forward to moving to that technology.

_hm
User Rank
CEO
re: Cree claims LED price-performance breakthrough
_hm   2/8/2012 1:48:22 AM
NO RATINGS
What is CRI for this new LEDs? Can it be 95% or higher?

Bert22306
User Rank
CEO
re: Cree claims LED price-performance breakthrough
Bert22306   2/8/2012 12:48:36 AM
NO RATINGS
I think that having any new appliance that requires LESS power than what it replaces, for a change, can only be beneficial overall. That in itself is worth money. Obviously, this can be taken to extremes, but it seems to me that it's wrong to dismiss these improvements, only on the basis that overall acquisition and operating costs are perhaps not quite low enough. Would anyone be so cost-obsessive, say, about their food? Never mind clothing? Think of it this way. Flat panel TVs, especially plasmas, require considerably more power than the CRTs they replaced. Thank goodness we have LED lighting just around the corner that can actually compensate for this.

<<   <   Page 2 / 3   >   >>
Top Comments of the Week
August Cartoon Caption Winner!
August Cartoon Caption Winner!
"All the King's horses and all the KIng's men gave up on Humpty, so they handed the problem off to Engineering."
5 comments
Like Us on Facebook

Datasheets.com Parts Search

185 million searchable parts
(please enter a part number or hit search to begin)
EE Times on Twitter
EE Times Twitter Feed
Radio
LATEST ARCHIVED BROADCAST
David Patterson, known for his pioneering research that led to RAID, clusters and more, is part of a team at UC Berkeley that recently made its RISC-V processor architecture an open source hardware offering. We talk with Patterson and one of his colleagues behind the effort about the opportunities they see, what new kinds of designs they hope to enable and what it means for today’s commercial processor giants such as Intel, ARM and Imagination Technologies.
Flash Poll