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#1
03-19-2010, 04:46 PM
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Calvin, what are the dimensions o f the tank you are trying to light? The XR-E is plenty up to 24" with optics. 40 degree optics will probably put you between 250 watt and 400 watt metal halide PAR. I'm actually going to do some PAR testing when I have the array up and running so that will give us all some real numbers to look at.
As for heatsinks, eBay can be good for all sorts. Mine were definitely not from any computer. I am using three that are 12 inches by 15 inches and weigh 15 to 20 pounds each. they were industrial heatsinks of some sort. Lots of industrial heatsinks show up on eBay which is what I was looking for. You can find large heatsinks for any application on eBay, especially if you don't care how pretty they are. I was more concerned with size and functionality as they won't be visible in the housing. If they will be exposed and you want them to look nicer then Heatsink USA is a better, albeit more costly, option. 
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#2
03-20-2010, 05:21 AM
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Yours are definitely not from a computer
 Curiously large heatsinks anyhow.Hmm, I'll give you some background on my plan. I had a mysterious tank crash or illness take a few of my zoa colonies October / November, then I moved in December and lost my firefish and hermit crab. My goby is MIA, so assumed dead... So I'm left with 5 surviving coral colonies that I want to move into a second 10 gallon where I can better control the conditions (what I have now is pretty good for macros and crabs, but a little unstable for good coral growth). The plan is to use a single 'spotlight' sort of light highlighting a rock island in the middle of the tank. Basically, an MC-E star surrounded by XR-E royal blue stars. I don't really think I'll use optics with them. I'll get to that with the 29 gallon tank later this summer, where I plan to use XR-Es and T5. I want to get away from halides, they project a lot of heat and I find it hard to deal with even with only a 70W. EDIT: Found and read this tonight... very interesting. http://www.advancedaquarist.com/2010/2/aafeature2
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Calvin --- Planning a 29 gallon mixed reef... Last edited by BlueAbyss; 03-20-2010 at 06:27 AM.
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