battery voltage

Hi, I'm not sure if this is the right place to post this but I can't find anywhere else. I have a 2016 Club Car Precedent 48 volt with six 8 volt batteriea and a light kit I want to install. I need a voltage reducer to go from 16 to 12v, but I can't find a definitive answer on what is right...

I installed a new set of batteries and want to know what the battery voltage meter should be reading after full charge? It seems it fluctuates in the extremes.

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