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I changed my 4x96w PC from 50/50 to 7100K Blue on my 150g. It contains mostly LPS (elegant, brains) and mushrooms (giants, rics), with a few SPS ( monti's, hydros and frag of acropora from my 250w MH tank). The bulbs were changed in January and it looks blue... but that's the look i was going for. These bulbs are 7100K-blue, not actinic. I believe that actinic wouldn't be as bright as these are. I like the look. Corals do look different than they were under the 50/50s. The oranges and greens "glow" more. The corals seem to like it... polyps multiplying and rics dividing. Even the acro, near the top of the tank shows purple growth tips. So far, it's a good thing.
I don't have a picture at this time
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