Hi all, I was hoping someone more knowledgeable about aquariums and specifically aquarium plants could help me out here. I have a 10 gallon aquarium that has two incandescent bulbs in the hood. I went to the pet store to get a plant for it, and they tell me that I should get one of those (14W) fluorescent tubes instead. Unfortunately to do that, I would need a new top for my aquarium, something like 80 bucks. They also had these bulbs, which (2) will fit into my current top (at least, the 13W ones will). I asked them if one of them would work, and they said no, something about the light not reaching the bottom of the tank. I know that that's nonsense, there's no way that the light will not travel through the foot or so of water to the bottom of the tank. My question is, is there any other reason why these bulbs wouldn't work for my fish and a plant as well? Should I get one or two? And which kinds? They have the 2.0, 5.0, and 10.0 (I think the numbers are based on the %age of UV light). Should I get 2 different ones? Or 2 the same? Thanks in advance.