Whats gonna happen when iI increase light conditions? I have ran low tech tank with 40 watts of light on this same 55 gal. I fertalized about twice a week.I'm planning to utilize a D.Y.I. C.O.2 system and i"m looking to utilize a 500watt metal halide fixture. So my question is this too much light? I want to be able to support baby tears in the forground and a few other high light plants.And if it's too much light then how much do I need? Is it possible to have too much light?