T5 are the most efficient that I know of (though I'm sure new technology is out there or coming). I can get a 4 ft t5 HO strip for about $34.00 here in Ohio. 2 would run less than 80. I dont think you're going to get much cheaper than that unless its used.
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For in much wisdom [is] much grief: and he that increaseth knowledge increaseth sorrow.
Member of the AGA (Aquatic Gardner's Association)
Member of the IBC (International Betta Congress)
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