02-22-2010, 05:49 AM
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You don't want 50/50 lights for plants, as those aren't the ideal color temperature for plants.
If you're talking about these bulbs
, you want the Colormax, not the 50/50.
Of course, you'd want to ask our saltwater experts over in the saltwater section of the forum, but from what little I know I think two of those 50/50 lights over a 5g hex might be enough for soft corals but might not be intense enough for stony corals. But then again, you'd have to ask the experts over on the saltwater end of things.