Liquid cooled LED's!!!!

[SgtM]

I need to pick a few of these up!

http://www.engadget.com/2009/07/15/eternaleds-debuts-worlds-first-liquid-cooled-led-light-bulb/

[Zephik]

Interesting. I wonder how well they work? Pretty cool in any case. Even if they perform like normal LED's I'd probably still buy them just to say I have them. lol

I wonder what its boiling point is?

[Collinstheclown]

$35? Yikes! A 25W incandescent it's the brightest bulb, I know most are 45-60 in my house. Which have all been replaced with CF bulbs anyway.

Bring the price down to like $10 and I can see this taking off alot more.




-CollinstheClown

[nevermind1534]

I'd take one of these over CF if they had some brighter ones; the fluorescent bulbs fade stuff, which I don't like.

[Spawn-Inc]

what i wonder is how does the heat get out? if through the glass there is no point in the water, assuming its that.

[SgtM]

LED's don't typically generate heat.. though at 4w I would imagine there has to be some heat.

[msmrx57]

From what the article said the liquid is more the keep the other components(resistors and transformer) cool not the led itself. It's designed to be replace incandescents or cfl's and not be a directional light source.

[SXRguyinMA]

$35? Yikes! A 25W incandescent it's the brightest bulb, I know most are 45-60 in my house. Which have all been replaced with CF bulbs anyway.

Bring the price down to like $10 and I can see this taking off alot more.




-CollinstheClown


:stupid:

[Kayin]

As soon as they hit 60w, they're on the shopping list.

[msmrx57]

As soon as they hit 60w, they're on the shopping list.

4W led = 25W incandescent 60w led = HOLY CRAP

[nevermind1534]

4W led = 25W incandescent 60w led = HOLY CRAP

Yeah, 375W incandescent.

[Kayin]

Equivalent to 60w incandescent. Not 60w LEDs.

[xmastree]

what i wonder is how does the heat get out? if through the glass there is no point in the water, assuming its that.
Presumably the water conducts the heat from the insides to glass.

[si-skyline]

Its actually baby oil :P

[d_stilgar]

what i wonder is how does the heat get out? if through the glass there is no point in the water, assuming its that.

Water, or baby oil, or whatever the liquid is, will conduct heat better than air. Let's say the LED is 2cm across (huge I know, but makes my math easier). The surface area would be 12.56 square cm. However, in a 10cm sphere the surface area is 314 square cm. The smaller area is too small for the heat to be conducted away via air, but if that heat is first taken away by a liquid to a surface area that's 26x bigger, then we have enough surface area to be cooled by air.

[XQuantum]

LEDs generate heat! But very few if they have no high package rate. Heat is the death of every semiconductor. So best way to extend lifespan of LEDs is to make good allocation of 20mA LEDs. A standard LED stripe with 60 LEDs on a flexible thin board generates only a handwarm surface. So this will be the best way in future. Not liquid cooled high power leds.

http://www.led-stripe.com

[slaveofconvention]

$35 may seem like a lot - but with a mtbf of 35000 hours, assuming it's on 8 hours a day, 7 days a week, that's 11+years - does about $5 a year INCLUDING power cost sound better?

[progbuddy]

LED's don't typically generate heat.. though at 4w I would imagine there has to be some heat.

Yes. It's not a long, drawn-out micro-coil filament or a gas-filled tube. It is a very small patch with 4 watts running through it about the size of half a grain of rice.