1. ## Re: Liquid cooled LED's!!!!

Originally Posted by msmrx57
4W led = 25W incandescent 60w led = HOLY CRAP
Yeah, 375W incandescent.

2. ## Re: Liquid cooled LED's!!!!

Equivalent to 60w incandescent. Not 60w LEDs.

3. ## Re: Liquid cooled LED's!!!!

Originally Posted by 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.
Presumably the water conducts the heat from the insides to glass.

4. ## Re: Liquid cooled LED's!!!!

Its actually baby oil

5. ## Re: Liquid cooled LED's!!!!

Originally Posted by 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.
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.

6. ## Re: Liquid cooled LED's!!!!

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

7. ## Re: Liquid cooled LED's!!!!

\$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?

8. ## Re: Liquid cooled LED's!!!!

Originally Posted by SgtM
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.

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