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-   -   230% efficent light source (http://forums.pelicanparts.com/off-topic-discussions/665886-230-efficent-light-source.html)

lane912 03-16-2012 07:00 AM
230% efficent light source
 
well no laws were broken either-
Ultra-efficient LED puts out more power than is pumped in (Wired UK)

ideas?

Zeke 03-16-2012 07:04 AM
This should be good. First in.

scottmandue 03-16-2012 07:09 AM
Hook it up to a generator and we could rule the world!

Or better yet shine it on a solar panel!

Edit to add. read the article... looks pretty cool.

svandamme 03-16-2012 07:18 AM
Quote:
Originally Posted by scottmandue (Post 6627162)
Hook it up to a geRerator and we could rule the world!


fixed it for ya

lane912 03-16-2012 07:54 AM
what if you made electrons from the extra photons and feed it back to the light emitting device you are making electrons from?

lane912 03-16-2012 07:55 AM
will this take the power away from oil?

svandamme 03-16-2012 08:03 AM
Quote:
Originally Posted by lane912 (Post 6627267)
what if you made electrons from the extra photons and feed it back to the light emitting device you are making electrons from?
you'de probably have a system loss that makes you end up with darkness.

krystar 03-16-2012 08:12 AM
woooo defying the laws of thermodynamics!

all u need now is 1 of those bulbs and hook it up to a solar panel and back to itself. free energy from nothing!

legion 03-16-2012 08:17 AM
Quote:
However, while MIT's diode puts out more than twice as much energy in photons as it's fed in electrons, it doesn't violate the conservation of energy because it appears to draw in heat energy from its surroundings instead. When it gets more than 100 percent electrically-efficient, it begins to cool down, stealing energy from its environment to convert into more photons.
To me, that means that if deploying these in a large scale, they could have unintended consequences, as you cannot explicitly control what heat energy it draws from its environment.

On the flip side, they would probably make the ideal fridge light.

lane912 03-16-2012 08:20 AM
It depends on the wavelength. If we use the wavelength where the human eye has maximum sensitivity, 555 nm (yellow green), then 1 W = 683 lm. That's 1.464 x 10^9 picowatts per lumen.

At 69 picowatts per LED you would need around 21 million of them to give you a lumen!

RWebb 03-16-2012 11:27 AM
interesting -- I've been wanting to replace the Dometic fridge in my VW Westy and now...

flipper35 03-16-2012 11:39 AM
Quote:
Originally Posted by legion (Post 6627316)
To me, that means that if deploying these in a large scale, they could have unintended consequences, as you cannot explicitly control what heat energy it draws from its environment.

On the flip side, they would probably make the ideal fridge light.
Yeah, but would the light go out when you opened the door?

dhoward 03-16-2012 11:41 AM
Quote:
Originally Posted by legion (Post 6627316)
To me, that means that if deploying these in a large scale, they could have unintended consequences, as you cannot explicitly control what heat energy it draws from its environment.

On the flip side, they would probably make the ideal fridge light.
The solution to global warming.
Parking lot LEDs

krystar 03-16-2012 12:06 PM
and the commercial/industrial platform of this would need reverse heatsinks.

thing is could you pair a regular LED and a uberLED together so that the uberLED IS the heatsink for the regular LED. how much heat wattage draw can you create.

kach22i 03-19-2012 05:43 AM
Perfect light for a refrigerator, it cools down the surrounding area, right?

Quote:
...............it appears to draw in heat energy from its surroundings instead.
Maybe we can use it to cool things.

GH85Carrera 03-19-2012 06:21 AM
Quote:
Originally Posted by lane912 (Post 6627321)
It depends on the wavelength. If we use the wavelength where the human eye has maximum sensitivity, 555 nm (yellow green), then 1 W = 683 lm. That's 1.464 x 10^9 picowatts per lumen.

At 69 picowatts per LED you would need around 21 million of them to give you a lumen!
So 21 million of them to make as much light as a candle. How much does it cost to make 21 million of them and how big is the lamp going to be?

red-beard 03-19-2012 06:32 AM
Quote:
Originally Posted by lane912 (Post 6627321)
It depends on the wavelength. If we use the wavelength where the human eye has maximum sensitivity, 555 nm (yellow green), then 1 W = 683 lm. That's 1.464 x 10^9 picowatts per lumen.

At 69 picowatts per LED you would need around 21 million of them to give you a lumen!
A man after my own heart! SmileWavy

RWebb 03-19-2012 11:40 AM
Quote:
Originally Posted by GH85Carrera (Post 6632735)
So 21 million of them to make as much light as a candle. How much does it cost to make 21 million of them and how big is the lamp going to be?
don't conflate research results with a product


ask yourself how many semi-conductor devices are on a current Intel CPU, a memory chip, or an LED TV screen

and then Google Shockley and the first one made...

GH85Carrera 03-19-2012 11:51 AM
Oh come on. My comment was in jest.

It is interesting theory at this point but I can't imagine it will be used as a light source in the home in the near future. It may have some applications someday but not as a replacement for the light bulb.

lane912 03-19-2012 01:48 PM
LEDs are now being produced on a single chip the size of a standard CPU. what looks like a single square of light is in fact hundreds or thousands of individual emitters packed into a square inch and a half or so-


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