eclipse 12 new lighting

I got a question... i have had a 12 gallon marineland eclipse 12 system for almost a year and the light just burned out. Was wondering if it is worth it to buy another bulb or to find another fixture for it. the lighting isn't really that great to begin with. I'm only keeping a couple of clowns...

I started my tank in May 21 2009 so it is new. It is a Eclipse Model 12gal I would like to try and be able to have coral (soft,hard) in my tank and made some day try anemone. But my problem is I have not clue about Watt or how many to a gallon cause none of the books I have read really...