Not so sure about atinics but if were talking about growing macro in a sump refuge area the best lights to use are 6400k or red grow bulbs as plants use more red to grow, if you look at grow/veg bulbs on eBay they are usually 6400k or red.
If you're trying to grow sponges in the sump 420nm or no light is best....
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Always looking for the next best coral...
90g starphire cube/400mhRadium20k/2 XHO/2x27w UV/2x39w T5/ 3 Trulumen led strips
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