Hi everyone, I just had a few questions about the Marineland single and double bright lighting. My first question is can they grow plants? I have a planted tank and want to know if these provide a good light source for the plants. Secondly, when it says 36"-48" does this mean it can fit both 36" long tanks and 48" long tanks? And thirdly, if these do work for plants which is better the single bright or the double bright? Thanks and sorry for the long post.