Remember that there is no requirement that it be at the top of the mast. In fact, there's lots of reasons it's better off down low, like in a crowded anchorage, during a fireworks show, when the nitwits weigh anchor and make a mad dash for the marinas. An anchor light at the top of a 55 ft mast might as well not be there at all.
From the Colregs:
Rule 30 - Anchored Vessels and Vessels Aground
(a) A vessel at anchor shall exhibit where it can best be seen:
(i) in the fore part, an all-round white light or one ball;
(ii) at or near the stern and at a lower level than the light prescribed in subparagraph (i), an all-round white light.
(b) A vessel of less than 50 meters in length may exhibit an all-round white light where it can best be seen instead of the lights prescribed in paragraph (a) of this Rule. (emphasis added)
Sounds to me that you're in compliance with the regulations, with one anchor light 'in the fore part' and another 'near the stern and at a lower level'. The regs say you 'may' use only one for boats less than 50 meters, but nothing says you can't use two. Sounds like a prudent arrangement to me.Although I do have an approved anchor light on top of the mast, I also have one generally hanging above the cockpit. Too many power boaters only look straight a head when flying around at night. I would rather not get hit rather than just say "I have an approved anchor light" and leave it at that.


We also have lights showing below and not just the masthead light most of the time,.. I would rather not get hit rather than just say "I have an approved anchor light" and leave it at that.
We use those as well as lots of other boaters. Have them on the Endeavour in the yard right now and they sure help in climbing on and off the boat at night. When we were out for a month before Christmas in Florida Ruth had to have Christmas lights and so we used some cheap solar ones,.....I recently bought several small solar garden-lights when they went on sale. I plan to hang or mount a few around the deck and shrouds when we're going out for a few days. They charge themselves during the day and switch on automatically at dusk.
What! That old piece of junk....Or a more vintage solution. Given to me by a good friend. Cleaned up well. Lasts about 9-10 hours on one fill of lantern oil. It's specifically an anchor light and is wind and waterproof.
rob j