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ryno212
09/30/2010, 06:02 AM
Would a PAR38 20k with 80 degree optics be enough for a 10g cube if it only has soft coral and few acans or would the 60 optics be better?

BennyFrank
09/30/2010, 09:26 AM
what are the dimensions of the cube?

Here is a link where you can manipulate optics/height/tank size etc. to simulate coverage. I would also try find the PAR plots of the bulbs you are considering.

http://www.trashboard.de/wp-content/uploads/illumination.swf

I just purchased PAR30 bulbs from RapidLED and am very happy with them. They may be more appropriate for your situation with a smaller tank and lower light corals.

ryno212
09/30/2010, 11:54 AM
15"x12"x12"
I'll look at the link when I get home, I can't open it on iPhone.