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wow, that's a LOT of cooling.

Having said that, i've seen work lamps with the 50w heatsinks on them and they don't seem to have a huge heatsink fan.

I too am curious as to how well these chips work on a fish tank, would love a pair of them lighting up my 75 gal.

Another route to take would be a bank of 3w cree Q5's..... they seem to be proven and "cheap" for aquarium use.
 

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WOW, that is the first time i've seen led kits that seem to be geared for aquariums......

having said that, are there any reviews on how well an R5 bulb works on a planted tank? I know they where saying a while back that the Q5's (which where best at the time) had a nice spectrum for growing plants (a nice peak in the blue an a smaller peak in the red). The R5's do put out a LOT more light an the Q5's tho for the same wattage.
 

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Every company will have different lines ("bins") of led's....

Cree's are separated by Q1 - Q5 then R1 to R5........

The Q1's will put out MUCH less light than a r5 bulb... .. personally i'm using a Q5 3w cree flash light at home too and it puts out roughly 230 lumens.

I'm not sure personally how well the R5's work (they put out a lot more light than a Q5 but are also 3w) as i've not had a chance to look at their output spectrum yet. I do know a Q5 will work well in a aquarium if given enough of them.. In the fourm before the crash there was a write up about a DIY hood using LED's, and it worked GREAT.
 
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