i run a 6 x 54 watt t-5 on my 55g. currently, i have 2 10000k's(soon to be replaced), 2 super actinics and 2 aquablue plus'. i think it gives my tank a 14k look. and it looks really good! especially ther zoa's. i personally think that the lighting you choose does have an effect on the color of the zoa's. the color on mine really seemed to pop after i put the above mentioned bubls in. i'm still pretty new, but i'm going by what i saw. HTH