Well, I ran into the same problems on 1974
C&C 35, two circuits for starboard and port
cabin lights. The old lights were protected by two 5A panel mounted
fuses. Since the 40+ year old
power distribution panel with individual
fuses for 25+ switches was all corroded, I just replace the
power disti with a new panel and I just merged port and startboard lights into a
single circuit with a one 5A circuit breaker.
Then I replaced every
single light with a new LED fixtures and i used these:
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
It has worked great for two seasons and the light is amazing ... and abundant. Unlike before.
My two cents.