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Hey guys, sorry for posting a lot just so much easier having people who know what they're talking about . I'm gonna try to get a light for my 55 gallon tank but not sure how big of one I need? Its 48 inches long and 21 inches tall 12 inches wide. You can see that the middle part of my tank doesnt get much light at all. I have these two for $14 each they're 15 inches long. But trying to figure out how big of a light I need I want to get into plants and dont want to end up getting one too small.