Can I get a few descriptions of how folks have configured nav lights for their small boat? I plan on a bi-color (Attwood LED), stern(LED), top-of-mast anchor (Davis Mega-light), and something for a masthead (Perko is what I've found) for my 20'. My goal is minimal power draw since it will be run for 2-3 days at a time on one 75 Ah AGM battery, in addition to other things. Is all this necessary? (If I interpret the USCG specs, then I really only need a visible flashlight unless I'm motoring). How do folks have it set up for the mast that gets raised and dropped regularly? Are wires run thru the mast or on the outside?Do pop rivets hold a fixture in well?I don't wanna reinvent the wheel, so thanks for your input.