Don't know. But they DO make 12v - 120 v inverters. For a half-dozen
lights, you're only talking about 100 watts, which should cost about $50.

inverters lose or waste power in conversion. they do sell 12 volt
regular fluroscnts for camping and RVs.......

any cabins campsites nearby?

had a fiend with this problem he ran a underground line to the nearest
cabin and connected t them and split the power bill.

there are a variety of possible solutions how much does the power
company want for a line?