I'm looking for simple answer to a lighting question (if there is one) . The more I read about lighting the more I get confused. The tank that I am asking about is a 55 gallon (standard 4 foot long) and the lighting fixtures are the ones that came with the tank. The fixtures are side by side lengthwise on the tank and each holds an 18 " (i think it's 15 watt) bulb. I have sand as the substrate. The fish that I have are red zebras, rustys, acei, and socolofi. I plan on adding (when I can find them) possibly hongi and/or saulosi. What bulbs can I get (that won't cost tooooooo much) that will show of the colors of these fish. I prefer not to use a bulb that gives the water a yellowish tint. Thanks for your help