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^^ I learn something new everyday. And most days on Fishlore, that something is from Nutter. ;DNutter said:Incandescents contain lots of light from the red end of the spectrum, which is great for growing algae, but not so good for plant growth. They also use lots of energy, putting out lots of heat for not much light in comparison to energy savers, CFL or fluorescent lighting. The Energy Savers will give you more light that the plants can use as well as using less energy to do it. Plants will grow better under 15w Energy Saver than they will under 100w incandescent. Mostly because of the spectrum that is emited.
You've just found one of several reasons why the WPG "rule" is a flawed metric... different types of lighting systems have different levels of efficiency. And you can't really even boil it down to incandescent vs. fluorescent, either, since different types of fluorescent fixtures can also have varying levels of efficiency.Suave said:so I'm guessing then that the watts per gallon rule should be used when a person using flourescents? I mean by that, if someone has a 'lowlight' planted tank with 1.5wpg, that would only be so with flourescents no incandescents... right?