I have a Prodrive with the older charging system, I use my sealbeam/headlight for running. I'm looking for a light(s) that draws low amps for the bow to help light up when running or picking up or putting out decoys. Is it best to run the lights both off the engine battery or my trolling motor battery? Thanks in advance for the help.

word of advice go to bass pro and pick you up a atv spotlight i use this and also have the swamp lights on my boat but this spotlight is bright as hell and everone who rides in my boat and uses it ends up getting themselves one

Unless you are making really long runs a small lawn tractor type battery would brobably be enough for short runs or use. You would just have to charge it after getting home each day. I always carry a second (LT) battery.