Quote:
Originally Posted by Farrmanchu
I originally used only 2 bulbs, and when I went to 4, the Coraline on the top back of the tank actually bleached.
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lol coraline doesn't grow in the top 8" of my own tank
I've got a little porite frag up there now, and that's all there is for life up there. And the fixture is run ~7" from the water surface.
Quote:
Originally Posted by littlesilvermax
I disagree with T5s or VHOs not affecting temp as much as halides. Flourescents put off a lot of heat too, it is just not as concentrated as a halide.
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Agreed, my sunlight supply fixture (8 bulb 4' fixture) gave off crazy heat on my 120g. increased the temperature by 6-8 degrees without the 6", 100cfm AC fan! I think it was the light hitting the rocks, then warming the water. But it can really heat up the tank if I'm not careful. I run the fan on a timer to tweak evaporation/top-off, and I have to adjust it every once in a while.
Quote:
Originally Posted by Fish
Are you thinking of "Aquatinics" fixtures? ... I know that the Sunlight Supply have been tested with fans and a par meter and that their output is better with active cooling... but I didn't think it was anywhere near 75% better! I thought it was more like 15-20%???
- Chad
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No, not the Aquatinics, I mean the ATI fixture is the "awesome" fixture from germany. Don't know if it's available yet, but I read about somone running one on a 120-240 transformer in order to review it, and it got an output of 320 (don't know what the reading was in. PAR, lux, dunno), compared to sunlight supply's 150. Somone on the same thread tested their sunlight supply fixture after active cooling was installed in the top (3 90mm computer fans), and it increased to 250. I just can't find the damned thread!
ATI cools their fixtures to a specific temperature, and the reflectors are even coated in silver!
I remember reading somewhere, too, that measuring the PAR of flourescents is difficult compared to MH because of MH being a point source, and flourescents being a spread light. advanced aquarist had a good way of measuring a spread light source by measuring it the same way they measure MH reflectors. They used this method to review the solaris fixture.
http://www.advancedaquarist.com/2006/8/review2