I am thinking of switching from my 3 20W fluorescents to a home brew halide lamp. For a 37g tank is one 175w 5500 bulb enough? If so, how would I get the light to evenly disperse across the surface of the bottom of the tank, or should it not matter? be seeing you... Adam Aronson aaronson at aol_com adam.aronson at spcorp_com