Aside from Joe's comment on bugs, I see value in a "deck level" anchor light. I have one similar to this:
https://www.amazon.com/Pactrade-Marine-Navigation-Anchor-Splashproof/dp/B01KY4477I I plug it into a 12 vdc receptacle at the helm station and hang it from the boom. I also show the one at the mast top. Advantages: a spare anchor light and it can be seen by drunken party barge drivers (is that redundant?). Disadvantages: bugs and more light in the cabin for sleeping. Dennis C. Touche' 35-1 #83 Mandeville, LA
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