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So question, how does this work? I just purchased the H160; it should be here on Sunday. The intent I want to happen is not to have a wide spread of light because the current knock-off I have from Amazon creates a spread onto my skimmer causing algae growth on the inside skimmer body as well as other areas within my sump outside of the dedicated refugium space
My design is just for the H380 at the moment. But it works by preventing the light from spreading out for an additional 4" or so; its the equivalent of lowering your light fixture 4", without risking putting it closer to the water. Reduces spread