The best lighting for the least cost is gonna be a dual 24 inch shop light fixture. I am not exactly sure about the wattage they come in but I am sure they come in T12, T10, T8 and T5 now. Try to get a T5 or T8. Any of them will give you a lot more light than what you have and should only costs $25 for fisture and bulbs at Walmart or a good home supply store like home depot or Lowes. There is always the chance of finding a fixture that will hold 3 bulbs.