Well, price aside, what brand is the fixture? You want to stay away from fixtures under the brands Jebo or Oddesy. They pretty cheaply made fixtures, and from what i hear, their fixtures only take bulbs that THEY make. Brands like Current USA are good. A little bit more pricey, but when it comes to coral, you don't want to slack on the lighting at all. I forgot the names of some other brands, but there are good ones out there. Give us the names of the brands and their prices, and then we can give you a better idea of how good, or how worth-it it is.