150W in a single chip LED

[overhal]

http://phys.org/news/2014-12-bright-future.html

 

I just wanted to share this with you guys!

[Horerczy]

Neat.

 

Too bad its only at 15% working efficiency. Still it's a pretty cool advancement in led technology.

[overhal]

But even at 15%, the necessity of a liquid cooling system shows the power density of this one hahaha

 

Can you imagine if we used our LED heatsinks to heat our tank water and keep the LEDs cool? lol

[Benny314]

Overhal you make that comment but I was considering that as an option on a algae scrubber design I was planning.

Tap some water off the overflow to feed over the screen and a little more to drain through a PC liquid cooling plates with the LEDs attached to one side.

Should keep the LEDs nice and cool and free heating for my tank, it never gets that warm down here in deepest darkest Cornwall UK.

I may yet try it, but I've ended up with some mangroves so I'll give them a crack first.

[Horerczy]

It would be fascinating i guess though that would mean hoses between the lights and tank. Difficult to manage without making it an eyesore.

[farkwar]

Just make the lights waterproof.

 

And mount them underwater.

[overhal]

An underwater fixture is actually an interesting idea haha

 

But the only problem I see is that, from what I know, aluminum is not reef-safe. I think the only metal that has a good conductivity and might be reef safe is metalic silver or gold. I might be wrong though.

 

And about the fixture + water cooling, instead of the hanging style fixture, make tubes going inside the fixture instead of above the fixture and holding the fixture through the attached wires.

[evilc66]

Using salt water for cooling an LED rig is a major challenge. One of which I have looked into in the past. It's really not a practical option. Grade 2 titanium is really the only long term option, as even mil spec hard anodizing with a teflon sealer doesn't hold up well to salt water over time. Titanium is a terrible thermal conductor, and horrendously expensive.

 

To the original topic, I'm not finding it all that exciting. The bigger the die, the greater chance of defect and failure. There is a reason that the likes of Cree and Philips aren't following a similar path.

[Horerczy]

To the original topic, I'm not finding it all that exciting. The bigger the die, the greater chance of defect and failure. There is a reason that the likes of Cree and Philips aren't following a similar path.

Not to mention the increased complexity of the die being more expensive to manufacture and the efficiency doesn't hold a candle to smaller dies.

[evilc66]

I found it funny that they talked about stadium lighting as an application here. There is nothing about this concept that makes it better for stadium lighting than any other LED topography. Also, large area lighting using a centralized light source distributed via light pipes or fiber. Seems stupid to rely on a single low reliability light source to light a large area like a house.

[farkwar]

This is a photograph from one of my favorite photographers.

 

http://s1078.photobucket.com/user/RichardSperry/media/20070612-burtynsky-mw13-001-910-1.jpg.html][/url]

 

Edward Burtynsky

 

https://www.google.com/search?q=edward+burtynsky+china+landscapes&client=tablet-android-att-us&source=lnms&biw=800&bih=1280&tbm=isch&sa=X&ei=Eq-QVOvqDse3oQSv-YGoAw&ved=0CAYQ_AUoAQ#tbm=isch&q=edward+burtynsky+china+landscapes+buildings&facrc=_

 

The Chinese arent interested in efficiency. Look at the walls of the buildings. There is an AC unit hanging out of each apartment.

 

They are putting up one scyscraper apartment building a day in the capitol. They need lights for all those people. The LED has no application for us, for the Chinese who 20 years ago were using fire for light, its perfect.

[GHill762]

 

They are putting up one scyscraper apartment building a day in the capitol. They need lights for all those people.

 

have you seen the ghost cities? they build entire cities and people can't afford to move to them so they continue to bunk up multiple families in an apartment..

 

china is very.....interesting..

[farkwar]

have you seen the ghost cities? they build entire cities and people can't afford to move to them so they continue to bunk up multiple families in an apartment..

 

china is very.....interesting..

 

His photos of the Three Gorges Dam project are fantastic, like a lucid drug induced nightmare.

[evilc66]

The Chinese arent interested in efficiency. Look at the walls of the buildings. There is an AC unit hanging out of each apartment.

 

They are putting up one scyscraper apartment building a day in the capitol. They need lights for all those people. The LED has no application for us, for the Chinese who 20 years ago were using fire for light, its perfect.

 

You kinda contradicted yourself there. They put individual AC units in each apartment because it was too costly to set up the infrastructure for roof mounted units with duct work to each apartment. What makes you think they will put in the effort to do that for light?

[farkwar]

Evil,

 

Individual ac units is completely inefficient. Energy wise.

 

 

 

In 20 years, China will be the perfect example of a blackened skies Dystopia. If its not already. They have a whole coastal town, which melts down the solder of PC boards to get to the gold conductors and lead. The stench of molten lead can be smelled a mile before reaching the town.

 

We get tin whiskers now, because of it. A whole town breathing airborne lead is what they get, mental retardation, birth defects, and crippling deformations.

[evilc66]

I didn't say it was efficient. Neither did you. All I'm saying is that they used individual AC units in each apartment to save cost and effort from the building as a whole. What makes you think they will change their tune for lighting?

[Horerczy]

I think it's funny that they basically invented a solid state metal halide. As far as efficiency goes at least.

[farkwar]

C, I don't understand the point of your posts. May I clarify?

 

I wrote that it was inefficient in post 11. I was replying to H's post number 2.

 

I did not write that it was efficient, correct..

 

Then I gave numerous examples via a link to photos(one is embedded), that the Chinese are not interested in efficiency, at this point of their socio-economical state. Individual AC units to cool skyscrapers is an example of energy inefficiency and environmental ignorance.

 

I did not write that they will "change their tune". I wrote the opposite, and predict that in 20 years, due to their environmental shortcuts, they will be living in a blackened sky Dystopia(Brazil, Bladerunner, Highlander3, 1984, The Matrix, Eraserhead, et al). Breathing in smog laced with vaporized lead, will be the norm.