Ballast 1 is a normal set up for NO lighting. Ballast 2 is a set up for running in series and will overdrive the bulbs, what kind of bulbs are you trying to run?
Steve
The second one is overdriving and may not even work if the total length of all the lamps is longer than what the ballast can handle. I second Steve question, what kind on lamps?
Lee
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Need more time for the tank... Break a leg!