The Planted Tank Forum - View Single Post - DIY LED kit for a heavily planted 20L (solderless?)
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Old 05-18-2012, 05:27 AM   #8
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If there are 5 LEDs per row spaced four inches apart, then the three rows would be centered over the middle 20 inches of a 30 inch tank. With 40 degree optics, wouldn't that mean the ends of the tank would be quite dark?
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