Keeping guppies or SPS and clams? Dimension of tank? 30" x ??. How deep is the tank? Budget is important. A Radion pendant would be nice, run you about $900. MH is my favorite, but might cook the tank. T5 is popular, used fixtures $200 and up. 30" wide is an odd size, so might limit the options.
If you're just keeping fish, you might get away with $100.
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Brad
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