What are the does and don't of using a RV power converter, 110 to 12 volt, to run pumps, lights, etc...(all 12 volt) in a water garden situation. I have a magnatek 50 amp, series 900 (model 50), I can use.. I do not have the number of watts I will be using, I just wandered what the short falls might be in using this kind of system or the precautions needed.. I have now approximately 35 walk-way (9watt) bulbs, and underwater lights (4 at 35 watt) I am using..With four different power supplies...I would like to know if I could just this one. Thanks...