The lights on my current 'fish only' tank are going south and i want to replace them. The current setup is a 150 gallon 'fish only' using 2 sets of T5 doubles (one full spectrum, one full actinic bulb). Most of my fish are 3 to 6 inches in length and the tank has been stable for five years. Now I would like to step up the lighting and try to grow some basic inverts and starter corals.

I am thinking about an LED setup with 2-36 inch units or 1-72 inch unit. I need to educate myself on the options available while keeping costs in mind. Can anyone suggest websites or books that would help me understand the lighting options?

Thanks much!