Quote:
Originally Posted by dirtyreefer
For actinics, you are most likely only supplementing to improve the appearance of your tank, not because you are trying to increase the total output of your lights.
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The corals that I keep are moderate to deep brain-shapes. They live at moderate depths and don't require a lot of light. The type of light that reaches their natural habitat (at 25-30 metres) is fairly low-wavelength light and is not very intense.
Given these natural settings, actinic light seems to be the best choice of light for replicating their natural environment.