I would go with what is standard gauge wiring in a shop.as far a the 110v outlets you can go with 14 Ga for 15 amps and 12 Ga for 20 amp outlets.I would use flex conduit,and I like the plastic outlet boxes but metal one's work fine.For me I feel the led's don't put out enough light to work in the dark;maybe your eyes are better.I would save your money and by building type panels and not spend it on lesser quality RV breaker panels.
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