Looking to set up boat. Why wouldn't running 120v 50watt LED lights off a car battery inverter (DC to AC) work as well as using 12v 50 watt LED's off same battery? 120v LED lights cost less than the 12v ones. My guess is that the inverter uses some of the battery power thus shortening time to run the lights. I am looking to run 4-6 50 watt lights for 3-4 hours.........would the inverter route work? Thanks in advance.