230% efficent light source

[lane912]

well no laws were broken either-
Ultra-efficient LED puts out more power than is pumped in (Wired UK)

ideas?

[Zeke]

This should be good. First in.

[scottmandue]

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]

Originally Posted by scottmandue

Hook it up to a geRerator and we could rule the world!

fixed it for ya

[lane912]

what if you made electrons from the extra photons and feed it back to the light emitting device you are making electrons from?

[lane912]

will this take the power away from oil?

[svandamme]

Originally Posted by lane912

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]

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]

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]

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]

interesting -- I've been wanting to replace the Dometic fridge in my VW Westy and now...

[flipper35]

Originally Posted by legion

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]

Originally Posted by legion

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]

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]

Perfect light for a refrigerator, it cools down the surrounding area, right?

...............it appears to draw in heat energy from its surroundings instead.

Maybe we can use it to cool things.

[GH85Carrera]

Originally Posted by lane912

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]

Originally Posted by lane912

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!

[RWebb]

Originally Posted by GH85Carrera

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]

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]

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-