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FW the lights can be as simple as the little bulbs from wal-mart or walgreens called daylight CFL... these bulbs are just like those you would put in a normal outlet that are twisted... since they have their own ballasts built in you can buy normal outlets which are about 5 dollars a piece... something to attach them to above the aquarium... and some wire to attach to a power source (may want to get someone who has done it before...)
another simpler option is find a lamp that clips on a side, or a lamp that hangs from the ceiling, or really any way to get a bulb facing down...
on the more technical side these bulbs let out 6500 k color and with the size can easily be fixed to enough wattage for any lighting needs on most planted tanks...