On my boat, the fittings and wiring were so beat up and unaccessible that I gave up on them. Furthermore, I almost never sail/motor at night. The waters here are full of logs, debris, crab pots, etc. So I bought a couple of Navisafe Navi Lights from Defender. These are battery-powered LEDs. Pushing a button cycles between red - green - red/green - white. These nice-looking, waterproof units attach at the bow and stern with magnets (I modified the existing brackets for this). They conform to regulations in terms of visibility. Normally, the Navi Lights live inside the boat, safe and dry. The truth is, I've never used them.