well, the difference between 2 amp-hrs/day and 120 amp-hrs/day is a about
5,000
pounds in weight of the boat and generator and batteries. but, who's
counting.

Wow! 118 amp-hrs extra for lights! You must like it bright!
And 5,000 #'s for a few extra batteries? A generator?
On our boat, with 12 volt refrig, amps used for lightning is maybe 10% of our
total amp use. The big batteries, hi output alt, solar panels, are needed for
the refrig. not the lights
Sail on