Quote:
Originally Posted by malaybiswas
It all depends on the type of plants on the darker sides and how high you put your fixture. If it is 3-5 inches above the tank the sides should get enough light for stem plants to grow but probably not show enough color
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Having a 4' light on my 6' tank has worked out just fine. By placing the low light plants at the end, I don't have problems filling the whole tank. The only time I ran into problems was when I had floating plants that blocked out even more light.