As far as wiring them, I do belive you will not be able to series the bulbs. The balasts won't drive across the 2 gaps, basically. You parralel the tubes up. As long as the tube wattage does not exceed the ballast rating, you should be fine. So, if the ballast was rated for 4 48" bulbs, you can parralel 8 24" in their place.
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Dan Pesonen
Umm, a tank or 5
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