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RVs and campers, particularly older ones, are generally provisioned with incandescent bulbs. Replacing these with LED lighting can reduce power consumpting for those fixtures by about 90%.
LEDs tend to have cooler/bluer color than incandescents, which are yellowish in comparison. First learn what color you prefer (expressed in degrees Kelvin) then select LEDs in that range. Some sample color temperatures:
In order from best to worst:
LED lighting can be sensitive to the higher voltages associated with lead-acid battery Absorption and Equalization stages. Campers may want to run LED lighting power through a power regulator.