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Old 05-15-2012, 01:48 PM   #21
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Check out www.heatsinkusa.com they seem to have pretty good stuff. I got that heatsink from someone who I think got it from them. I ordered a similar sized one from china and it's not as well made or heavy duty as that one is, but if your mounting to plastic, weight may be an issue. I believe my larger heatsink is around 25lbs, the slightly smaller one is probably 15-20lbs.
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Old 05-15-2012, 01:58 PM   #22
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Mounting to plastic wont be bad ill have plenty of bracing for it
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Old 05-15-2012, 02:11 PM   #23
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Here is a full tank shot with the LEDs on.

Attachment 94891
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Old 05-15-2012, 02:26 PM   #24
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They look good
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Old 05-15-2012, 02:27 PM   #25
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What size tank is this?
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Old 05-15-2012, 02:33 PM   #26
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It's a 47g column tank.
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Old 05-15-2012, 02:34 PM   #27
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Sorry if thisbis a repeat? But how many leds is that?
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Old 05-15-2012, 02:46 PM   #28
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It is 9 x 10w leds on the big fixture. I also made a smaller strip of 12 x 1w leds. The 12x1w are 10 royal blues and 2x uv leds. So all together there are 21 emitters with 102w. I think I might add 3 more 10w's down the road. I have the parts , well everything but the actual emitters themselves.
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Old 05-15-2012, 02:53 PM   #29
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Looks like 9x10w LEDs or about 90 watts total.

It looks like a tall tank as well. I guess the better question would have been what the dimensions of the tank where. I'm still learning the ins and outs of LEDs myself and have read that a rule of thumb (knowing that this is all speculation still) is (L x W) / 16 x 3 = total watts to use. The 16 can be subbed with 14 for deeper tanks.

That being said. I know someone with a 125 that has 24 10w LEDs and going by that formula he should have 324 watts over the tank... but he was going from compact florescents...
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Old 05-15-2012, 03:15 PM   #30
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I believe the tank is 20x18x30.
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