right now in my 30 gallon eclipse tank i have 2 18in bulbs one is a 10,000k daylight and the other is an acting 03 blue bulb. I want to make sure that i get good lighting to the tank so i can put leather coral and nicer looking stuff in the tank. Some one told me about a 50watt metal halide system. I have never heard of that. Also i have heard power compacts are good. What should i do?